RM38N0EC _51 Engine / Hybrid System _111803 STOP AND START _0509671 STOP AND START SYSTEM J

STOP AND START STOP AND START SYSTEM Backup Boost Converter Circuit

DESCRIPTION

A backup boost converter is built into the engine stop and start ECU. The backup boost converter helps maintain the power source voltage when the engine is restarted by stop and start control.

This prevents various functions such as the audio and visual system from malfunctioning if the power source voltage drops due to the battery voltage dropping when the engine is restarted by stop and start control.

If any DTCs are output, troubleshoot the DTCs first.

HINT:: A relay function and fuse function are provided in the backup boost converter.; If there is a malfunction in any of the electrical system circuits connected to the backup boost converter, the fuse and relay functions shut off the malfunctioning circuit to protect other circuits (remains shut off until next trip).; When the electrical system circuit is shut off, power to the circuit is cut off, causing any systems connected to the circuit to be disabled.; The fuse function is reset* when the ignition switch is turned off. If the malfunction still exists in the electrical system circuit that has been shut off by the relay function, it will be shut off again by the relay and fuse functions the next time the ignition switch is turned to ON.; *: A semiconductor fuse self resets according to electric signal.; The backup boost converter supplies power to:

·

Digital rear-view mirror system

·

Front radar sensor system

·

Parking support brake system

·

Air conditioning system

·

Tire pressure warning system

·

Electronically controlled brake system

·

Power steering system

·

Meter / gauge System

·

Headup display system; The external backup boost converter (eco run vehicle converter assembly) supplies power to:

·

Navigation system (w/ stereo component amplifier assembly)

WIRING DIAGRAM

Refer to DTC P323A00.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>P323A00202409,999999,_51,_111803,_0509671,RM100000002O9OM_02,P323A00

CAUTION / NOTICE / HINT

NOTICE:: ·

Before replacing the engine stop and start ECU, read the number of starter operations and write it into a new engine stop and start ECU.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>REGISTRATION202111,999999,_51,_111803,_0509671,RM1000000020651,

·

After replacing the engine stop and start ECU or air conditioning amplifier assembly, reset and perform learning of the air conditioning information in the engine stop and start ECU.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>REGISTRATION202111,999999,_51,_111803,_0509671,RM1000000020651,

·

Inspect the fuses for circuits related to this system before performing the following procedure.

·

After replacing the engine stop and start ECU, perform learning of the external backup boost converter (eco run vehicle converter assembly).

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>REGISTRATION202111,999999,_51,_111803,_0509671,RM1000000020651,

PROCEDURE

1.CHECK PROBLEM SYMPTOMS

Determine the trouble area by referring to the table below.

Effect on Vehicle	Trouble Area/Cause	Fail-safe	DTC Output	Stop and start cancel indicator	Symptom	Proceed to
When the engine is restarted by stop and start control: The following symptoms may occur · Audio and visual system is reset · The combination meter assembly fades out · The steering wheel feels heavy when the engine is restarted* *A DTC may be stored in the power steering system	Backup boost converter internal malfunction · Internal power source malfunction · Internal power source overvoltage · Duty error · Communication cycle error	Stop and start control prohibited	P323A00 P323A16 P323B29 P323B38	Blinks	Converter output voltage cannot be boosted when the engine is restarted	A
	Battery voltage drop	Stop and start control prohibited	P323A00 P323A16 P323B29 P323B38	Blinks		A
Systems on the converter output side do not operate B41 terminal: The tire pressure warning system will not operate B43 terminal: Both of the following will not operate · Digital rear-view mirror system · Headup display system IG41 terminal: All of the following will not operate · Front radar sensor system · Air conditioning system · Tire pressure warning system · Headup display system · Parking support brake system · Digital rear-view mirror system	Overcurrent applied to an output terminal (output terminal relay circuit is shutoff)	Stop and start control is prohibited (Connected ECUs or sensors may detect power source malfunction DTCs)	X087A	Blinks	Systems do not operate as power supply from the converter is cut off	E
Systems do not operate (Due to converter input side malfunction) IGP terminal: All of the following will not operate · Digital rear-view mirror system · Front radar sensor system · Parking support brake system · Air conditioning system · Tire pressure warning system · Electronically controlled brake system · Power steering system · Meter / gauge System · Headup display system IGR terminal: Electronically controlled brake system will not operate ACC terminal: - ILL terminal: Air conditioning system will not operate	Converter input circuit malfunction · Open or short to GND in IGR circuit · Open or short to GND in IGP circuit · Open or short to GND in ACC circuit	Stop and start control prohibited	-	Does not blink (Blinks when communication error DTCs are stored)	Systems do not operate as power supply from the converter is cut off	B
Systems on the converter output side do not operate (varies depending on the malfunctioning relay circuit the converter detected) AC42 terminal: - IG12 terminal: Meter / gauge system will not operate IG31 terminal: Both of the following will not operate · Electronically controlled brake system · Power steering system IL41 terminal: Air conditioning system will not operate	Malfunction in circuits the converter supplies power to (between the converter and ECUs or sensors)	Related systems do not operate as the relay circuit in the converter is turned off	-	Does not blink (Blinks when communication error DTCs are stored)	Systems do not operate as power supply from the converter is cut off	B
All of the following systems do not operate · Digital rear-view mirror system · Front radar sensor system · Parking support brake system · Air conditioning system · Tire pressure warning system · Electronically controlled brake system · Power steering system · Meter / gauge System · Headup display system	· Open in BBC fuse circuit · Short in converter circuit · Backup boost converter malfunction	Stop and start control prohibited	P061511	Does not blink (Due to disabled meter / gauge system)	All systems that the converter supplies power to do not operate (see circuit diagram)	A
		Stop and start control prohibited	P323A00 P323A16 P323B29 P323B38	Does not blink (Due to disabled meter / gauge system)		A
The audio does not operate (until the ignition switch is turned off)	Excessive audio volume Data List item "State of BBC" displays "BBC Overcurrent" while the circuit is protected	The relay circuit in the converter is turned off to cut off power supply to the audio and visual system (navigation system) (Returns to normal when the ignition switch is turned off)	-	Does not blink	If overcurrent is detected in the audio and visual system (navigation system), system operation is disabled while the ignition switch is ON (Returns to normal when the ignition switch is turned off)	C
The external backup boost converter (eco run vehicle converter assembly) output side system does not operate · Navigation system (w/ stereo component amplifier assembly)	· Open in BBC NO. 3 fuse circuit · Malfunction in circuits the converter supplies power to · External backup boost converter (eco run vehicle converter assembly) malfunction	-	-	Does not blink	All systems that the converter supplies power to do not operate (see circuit diagram)	D
The combination meter assembly cannot be turned off (short between IG12 and +B) HINT: Varies depending on the number of times an open occurs in the +B circuit	Converter circuit malfunction · Short between IG12 and +B	-	-	Does not blink	The converter cannot shut off the power source when the ignition switch is turned off	B
· Ignition switch cannot be turned off from ACC (short between ACC and +B) · Ignition switch cannot be turned off from ON (short between IGP or IGR and +B)	Engine stop and start ECU power source circuit malfunction · Short between ACC and +B · Short between IGP and +B · Short between IGR and +B	-	-	Does not blink	· Ignition switch does not turn ACC · Ignition switch cannot be turned off	B

Result:

Proceed to
A
B
C
D
E

GO TO DIAGNOSTIC TROUBLE CODE CHART

2.CHECK ENGINE STOP AND START ECU (POWER SOURCE CIRCUIT)

5.CHECK AUDIO AND VISUAL SYSTEM

7.CHECK HARNESS AND CONNECTOR (BIN TERMINAL POWER SOURCE CIRCUIT)

13.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - BBC NO. 1, BBC NO. 2 FUSES)

2.CHECK ENGINE STOP AND START ECU (POWER SOURCE CIRCUIT)

Disconnect the engine stop and start ECU connector.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
Click Location & Routing(A105)Location & Routingewd_type=routing;type=c;code=A105 Click Connector(A105)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A105;pinno=1,3
A105-1 (BIN2) - Body ground	Always	9.5 to 14 V
A105-3 (BIN1) - Body ground	Always	9.5 to 14 V

Tester Connection

Condition

Specified Condition

Click Location & Routing(A105)Location & Routingewd_type=routing;type=c;code=A105

Click Connector(A105)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A105;pinno=1,3

A105-1 (BIN2) - Body ground

Always

9.5 to 14 V

A105-3 (BIN1) - Body ground

Always

9.5 to 14 V

Turn the ignition switch to ACC.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
Click Location & Routing(A104)Location & Routingewd_type=routing;type=c;code=A104 Click Connector(A104)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A104;pinno=19
A104-19 (ACC) - Body ground	Ignition switch ACC	9.5 to 14 V

Tester Connection

Switch Condition

Specified Condition

Click Location & Routing(A104)Location & Routingewd_type=routing;type=c;code=A104

Click Connector(A104)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A104;pinno=19

A104-19 (ACC) - Body ground

Ignition switch ACC

9.5 to 14 V

Turn the ignition switch to ON.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
Click Location & Routing(A104)Location & Routingewd_type=routing;type=c;code=A104 Click Connector(A104)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A104;pinno=21,18
A104-21 (IGR) - Body ground	Ignition switch ON	9.5 to 14 V
A104-18 (IGP) - Body ground	Ignition switch ON	9.5 to 14 V

Tester Connection

Switch Condition

Specified Condition

Click Location & Routing(A104)Location & Routingewd_type=routing;type=c;code=A104

Click Connector(A104)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A104;pinno=21,18

A104-21 (IGR) - Body ground

Ignition switch ON

9.5 to 14 V

A104-18 (IGP) - Body ground

Ignition switch ON

9.5 to 14 V

Turn the ignition switch off.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
Click Location & Routing(A104)Location & Routingewd_type=routing;type=c;code=A104 Click Connector(A104)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A104;pinno=21,19,18
A104-21 (IGR) - Body ground	Ignition switch off	0 to 1 V
A104-19 (ACC) - Body ground	Ignition switch off	0 to 1 V
A104-18 (IGP) - Body ground	Ignition switch off	0 to 1 V

Result:

Proceed to
OK
NG

3.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - EACH ECU OR SENSOR)

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - EACH ECU OR SENSOR)

Disconnect the connector from the corresponding system ECU/sensor.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tire Pressure Warning ECU and Receiver
Tester Connection	Condition	Specified Condition
Click Location & Routing(A104,K7)Location & Routingewd_type=routing;type=c,c;code=A104,K7 Click Connector(A104)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A104;pinno=3,2 Click Connector(K7)Body>Floor Wire>Electrical Key and Tire Pressure Monitoring System Receiver Assemblyewd_type=component;type=c;code=K7;pinno=1,7
A104-3 (IG41) - K7-1 (IG)	Always	Below 1 Ω
A104-2 (B41) - K7-7 (+B)	Always	Below 1 Ω
A104-3 (IG41) - Body ground	Always	10 kΩ or higher
K7-1 (IG) - Body ground	Always	10 kΩ or higher
A104-2 (B41) - Body ground	Always	10 kΩ or higher
K7-7 (+B) - Body ground	Always	10 kΩ or higher

Inner Rear View Mirror Assembly*1
Tester Connection	Condition	Specified Condition
Click Location & Routing(A104,Q1)Location & Routingewd_type=routing;type=c,c;code=A104,Q1 Click Connector(A104)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A104;pinno=11,3 Click Connector(Q1)Body>Roof Wire>Inner Rear View Mirror Assemblyewd_type=component;type=c;code=Q1;pinno=6,1
A104-11 (B43) - Q1-6 (+B)	Always	Below 1 Ω
A104-3 (IG41) - Q1-1 (IG)	Always	Below 1 Ω
A104-11 (B43) - Body ground	Always	10 kΩ or higher
Q1-6 (+B) - Body ground	Always	10 kΩ or higher
A104-3 (IG41) - Body ground	Always	10 kΩ or higher
Q1-1 (IG) - Body ground	Always	10 kΩ or higher

Inner Rear View Mirror Assembly*2
Tester Connection	Condition	Specified Condition
Click Location & Routing(A104,Q16)Location & Routingewd_type=routing;type=c,c;code=A104,Q16 Click Connector(A104)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A104;pinno=3 Click Connector(Q16)Body>Roof Wire>Inner Rear View Mirror Assemblyewd_type=component;type=c;code=Q16;pinno=4
A104-3 (IG41) - Q16-4 (IG)	Always	Below 1 Ω
A104-3 (IG41) - Body ground	Always	10 kΩ or higher
Q16-4 (IG) - Body ground	Always	10 kΩ or higher

Air Conditioning Control Assembly
Tester Connection	Condition	Specified Condition
Click Location & Routing(A104,E22)Location & Routingewd_type=routing;type=c,c;code=A104,E22 Click Connector(A104)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A104;pinno=3,25 Click Connector(E22)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Air Conditioning Control Assemblyewd_type=component;type=c;code=E22;pinno=9,8
A104-3 (IG41) - E22-9 (IG+)	Always	Below 1 Ω
A104-25 (IL41) - E22-8 (ILL+)	Always	Below 1 Ω
A104-3 (IG41) - Body ground	Always	10 kΩ or higher
E22-9 (IG+) - Body ground	Always	10 kΩ or higher
A104-25 (IL41) - Body ground	Always	10 kΩ or higher
E22-8 (ILL+) - Body ground	Always	10 kΩ or higher

Clearance Warning ECU Assembly*3
Tester Connection	Condition	Specified Condition
Click Location & Routing(A104,E51)Location & Routingewd_type=routing;type=c,c;code=A104,E51 Click Connector(A104)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A104;pinno=3 Click Connector(E51)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Clearance Warning ECU Assemblyewd_type=component;type=c;code=E51;pinno=1
A104-3 (IG41) - E51-1 (IG)	Always	Below 1 Ω
A104-3 (IG41) - Body ground	Always	10 kΩ or higher
E51-1 (IG) - Body ground	Always	10 kΩ or higher

Millimeter Wave Radar Sensor Assembly
Tester Connection	Condition	Specified Condition
Click Location & Routing(A104,B5)Location & Routingewd_type=routing;type=c,c;code=A104,B5 Click Connector(A104)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A104;pinno=3 Click Connector(B5)Engine Compartment>No. 4 Engine Room Wire / No. 2 Engine Wire / No. 3 Engine Wire / No. 5 Engine Wire / No. 6 Engine Wire / Sensor Wire>Millimeter Wave Radar Sensor Assemblyewd_type=component;type=c;code=B5;pinno=8
A104-3 (IG41) - B5-8 (IGB)	Always	Below 1 Ω
A104-3 (IG41) - Body ground	Always	10 kΩ or higher
B5-8 (IGB) - Body ground	Always	10 kΩ or higher

Steering Sensor
Tester Connection	Condition	Specified Condition
Click Location & Routing(A104,E60)Location & Routingewd_type=routing;type=c,c;code=A104,E60 Click Connector(A104)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A104;pinno=23 Click Connector(E60)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Steering Sensorewd_type=component;type=c;code=E60;pinno=9
A104-23 (IG31) - E60-9 (IG1)	Always	Below 1 Ω
A104-23 (IG31) - Body ground	Always	10 kΩ or higher
E60-9 (IG1) - Body ground	Always	10 kΩ or higher

Power Steering ECU with Motor Assembly
Tester Connection	Condition	Specified Condition
Click Location & Routing(A104,C37)Location & Routingewd_type=routing;type=c,c;code=A104,C37 Click Connector(A104)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A104;pinno=23 Click Connector(C37)Engine Compartment>Engine Wire>Power Steering ECU with Motor Assembly (Rack and Pinion Power Steering Gear Assembly)ewd_type=component;type=c;code=C37;pinno=4
A104-23 (IG31) - C37-4 (IG)	Always	Below 1 Ω
A104-23 (IG31) - Body ground	Always	10 kΩ or higher
C37-4 (IG) - Body ground	Always	10 kΩ or higher

Skid Control ECU (brake actuator assembly)
Tester Connection	Condition	Specified Condition
Click Location & Routing(A104,A40)Location & Routingewd_type=routing;type=c,c;code=A104,A40 Click Connector(A104)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A104;pinno=23 Click Connector(A40)Engine Compartment>Engine Room Main Wire / Transmission Wire>Brake Actuator Assemblyewd_type=component;type=c;code=A40;pinno=36
A104-23 (IG31) - A40-36 (IGR)	Always	Below 1 Ω
A104-23 (IG31) - Body ground	Always	10 kΩ or higher
A40-36 (IGR) - Body ground	Always	10 kΩ or higher

Combination Meter Assembly
Tester Connection	Condition	Specified Condition
Click Location & Routing(A104,E143,E17)Location & Routingewd_type=routing;type=c,c,c;code=A104,E143,E17 Click Connector(A104)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A104;pinno=10 Click Connector(E143)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Combination Meter Assemblyewd_type=component;type=c;code=E143;pinno=6 Click Connector(E17)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Combination Meter Assemblyewd_type=component;type=c;code=E17;pinno=39
A104-10 (IG12) - E143-6 (IG+)*4	Always	Below 1 Ω
A104-10 (IG12) - E17-39 (IG+)*5	Always	Below 1 Ω
A104-10 (IG12) - Body ground	Always	10 kΩ or higher
E143-6 (IG+)*4 - Body ground	Always	10 kΩ or higher
E17-39 (IG+)*5 - Body ground	Always	10 kΩ or higher

Meter Mirror Sub-assembly*6
Tester Connection	Condition	Specified Condition
Click Location & Routing(A104,E160)Location & Routingewd_type=routing;type=c,c;code=A104,E160 Click Connector(A104)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A104;pinno=3,11 Click Connector(E160)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Meter Mirror Sub-Assemblyewd_type=component;type=c;code=E160;pinno=1,2
A104-3 (IG41) - E160-1 (IG)	Always	Below 1 Ω
A104-11 (B43) - E160-2 (B)	Always	Below 1 Ω
A104-3 (IG41) - Body ground	Always	10 kΩ or higher
A104-11 (B43) - Body ground	Always	10 kΩ or higher
E160-1 (IG) - Body ground	Always	10 kΩ or higher
E160-2 (B) - Body ground	Always	10 kΩ or higher

*1: w/ Digital Rear-View Mirror System

*2: w/ EC Mirror

*3: w/ Parking Support Brake System

*4: for TFT Meter Type

*5: for Optitron Meter Type

*6: w/ Headup Display System

Result:

Proceed to
OK
NG

4.CHECK ENGINE STOP AND START ECU (EACH ECU OR SENSOR POWER SOURCE CIRCUIT)

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CHECK ENGINE STOP AND START ECU (EACH ECU OR SENSOR POWER SOURCE CIRCUIT)

Disconnect the connector from the corresponding system ECU/sensor.

Measure the voltage according to the value(s) in the table below.

HINT:: Measure the voltage at the corresponding terminals.

Standard Voltage:

Tester Connection	Condition	Specified Condition
1: w/ Digital Rear-view Mirror System 2: w/ Headup Display System
Click Location & Routing(K7,Q1,E160)Location & Routingewd_type=routing;type=c,c,c;code=K7,Q1,E160 Click Connector(K7)Body>Floor Wire>Electrical Key and Tire Pressure Monitoring System Receiver Assemblyewd_type=component;type=c;code=K7;pinno=7 Click Connector(Q1)Body>Roof Wire>Inner Rear View Mirror Assemblyewd_type=component;type=c;code=Q1;pinno=6 Click Connector(E160)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Meter Mirror Sub-Assemblyewd_type=component;type=c;code=E160;pinno=2
K7-7 (+B) - Body ground	Always	10.5 to 16 V
Q1-6 (+B)*1 - Body ground	Always	10.5 to 16 V
E160-2 (B)*2 - Body ground	Always	10.5 to 16 V

Turn the ignition switch to ON.

Measure the voltage according to the value(s) in the table below.

HINT:: Measure the voltage at the corresponding terminals.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
1: w/ Digital Rear-View Mirror System 2: w/ EC Mirror 3: w/ Parking Support Brake System 4: for TFT Meter Type 5: for Optitron Meter Type 6: w/ Headup Display System
Click Location & Routing(K7,Q1,Q16,E22,E51,B5,E60,C37,A40,E143,E17,E160)Location & Routingewd_type=routing;type=c,c,c,c,c,c,c,c,c,c,c,c;code=K7,Q1,Q16,E22,E51,B5,E60,C37,A40,E143,E17,E160 Click Connector(K7)Body>Floor Wire>Electrical Key and Tire Pressure Monitoring System Receiver Assemblyewd_type=component;type=c;code=K7;pinno=1 Click Connector(Q1)Body>Roof Wire>Inner Rear View Mirror Assemblyewd_type=component;type=c;code=Q1;pinno=1 Click Connector(Q16)Body>Roof Wire>Inner Rear View Mirror Assemblyewd_type=component;type=c;code=Q16;pinno=4 Click Connector(E22)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Air Conditioning Control Assemblyewd_type=component;type=c;code=E22;pinno=9 Click Connector(E51)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Clearance Warning ECU Assemblyewd_type=component;type=c;code=E51;pinno=1 Click Connector(B5)Engine Compartment>No. 4 Engine Room Wire / No. 2 Engine Wire / No. 3 Engine Wire / No. 5 Engine Wire / No. 6 Engine Wire / Sensor Wire>Millimeter Wave Radar Sensor Assemblyewd_type=component;type=c;code=B5;pinno=8 Click Connector(E60)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Steering Sensorewd_type=component;type=c;code=E60;pinno=9 Click Connector(C37)Engine Compartment>Engine Wire>Power Steering ECU with Motor Assembly (Rack and Pinion Power Steering Gear Assembly)ewd_type=component;type=c;code=C37;pinno=4 Click Connector(A40)Engine Compartment>Engine Room Main Wire / Transmission Wire>Brake Actuator Assemblyewd_type=component;type=c;code=A40;pinno=36 Click Connector(E143)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Combination Meter Assemblyewd_type=component;type=c;code=E143;pinno=6 Click Connector(E17)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Combination Meter Assemblyewd_type=component;type=c;code=E17;pinno=39 Click Connector(E160)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Meter Mirror Sub-Assemblyewd_type=component;type=c;code=E160;pinno=1
K7-1 (IG) - Body ground	Ignition switch ON	10.5 to 16 V
Q1-1 (IG)*1 - Body ground	Ignition switch ON	10.5 to 16 V
Q16-4 (IG)*2 - Body ground	Ignition switch ON	10.5 to 16 V
E22-9 (IG+) - Body ground	Ignition switch ON	10.5 to 16 V
E51-1(IG)*3 - Body ground	Ignition switch ON	10.5 to 16 V
B5-8 (IGB) - Body ground	Ignition switch ON	10.5 to 16 V
E60-9 (IG1) - Body ground	Ignition switch ON	10.5 to 16 V
C37-4 (IG) - Body ground	Ignition switch ON	10.5 to 16 V
A40-36 (IGR) - Body ground	Ignition switch ON	10.5 to 16 V
E143-6 (IG+)*4 - Body ground	Ignition switch ON	10.5 to 16 V
E17-39 (IG+)*5 - Body ground	Ignition switch ON	10.5 to 16 V
E160-1 (IG)*6 - Body ground	Ignition switch ON	10.5 to 16 V

Result:

Proceed to
OK
NG

CHECK POWER SOURCE CIRCUIT (POWER SOURCE CIRCUIT OF RELATED SYSTEM)

REPLACE ENGINE STOP AND START ECU

Click hereEngine / Hybrid System>STOP AND START>ENGINE STOP AND START ECU>REMOVAL202406,999999,_51,_111803,_0501591,RM100000002MPW2,

5.CHECK AUDIO AND VISUAL SYSTEM

Turn the ignition switch off and wait for 1 minute.

Turn the ignition switch to ON.

Lower the audio volume.

Check if the audio and visual system operates normally.

OK:: Audio and visual system operates normally.

Result:

Proceed to
OK
NG

END

6.CHECK HARNESS AND CONNECTOR (EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) - STEREO COMPONENT AMPLIFIER ASSEMBLY)

Disconnect the external backup boost converter (eco run vehicle converter assembly) connector.

Disconnect the stereo component amplifier assembly connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(A100,K2)Location & Routingewd_type=routing;type=c,c;code=A100,K2 Click Connector(A100)Engine Compartment>Engine Room Main Wire / Transmission Wire>Eco-Run Vehicle Converter Assemblyewd_type=component;type=c;code=A100;pinno=5 Click Connector(K2)Body>Floor Wire>Stereo Component Amplifier Assemblyewd_type=component;type=c;code=K2;pinno=1,16
A100-5 (BO1), K2-1 (+B) or K2-16 (+B2) - Body ground	Always	10 kΩ or higher

Tester Connection

Condition

Specified Condition

Click Location & Routing(A100,K2)Location & Routingewd_type=routing;type=c,c;code=A100,K2

Click Connector(A100)Engine Compartment>Engine Room Main Wire / Transmission Wire>Eco-Run Vehicle Converter Assemblyewd_type=component;type=c;code=A100;pinno=5

Click Connector(K2)Body>Floor Wire>Stereo Component Amplifier Assemblyewd_type=component;type=c;code=K2;pinno=1,16

A100-5 (BO1), K2-1 (+B) or K2-16 (+B2) - Body ground

Always

10 kΩ or higher

Result:

Proceed to
OK
NG

GO TO NAVIGATION SYSTEM (AUDIO AND VISUAL SYSTEM)

Click hereAudio / Visual / Telematics>NAVIGATION / MULTI INFO DISPLAY>NAVIGATION SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING202409,999999,_56,_111823,_0502893,RM100000002OBSR,

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.CHECK HARNESS AND CONNECTOR (BIN TERMINAL POWER SOURCE CIRCUIT)

Disconnect the external backup boost converter (eco run vehicle converter assembly) connector.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
Click Location & Routing(A100)Location & Routingewd_type=routing;type=c;code=A100 Click Connector(A100)Engine Compartment>Engine Room Main Wire / Transmission Wire>Eco-Run Vehicle Converter Assemblyewd_type=component;type=c;code=A100;pinno=11
A100-11 (BIN) - Body ground	Always	9.5 to 14 V

Tester Connection

Condition

Specified Condition

Click Location & Routing(A100)Location & Routingewd_type=routing;type=c;code=A100

Click Connector(A100)Engine Compartment>Engine Room Main Wire / Transmission Wire>Eco-Run Vehicle Converter Assemblyewd_type=component;type=c;code=A100;pinno=11

A100-11 (BIN) - Body ground

Always

9.5 to 14 V

Result:

Proceed to
OK
NG

8.CHECK HARNESS AND CONNECTOR (ACC TERMINAL POWER SOURCE CIRCUIT)

REPAIR OR REPLACE HARNESS OR CONNECTOR (EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) - BATTERY)

8.CHECK HARNESS AND CONNECTOR (ACC TERMINAL POWER SOURCE CIRCUIT)

Disconnect the external backup boost converter (eco run vehicle converter assembly) connector.

Turn the ignition switch to ACC.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
Click Location & Routing(A100)Location & Routingewd_type=routing;type=c;code=A100 Click Connector(A100)Engine Compartment>Engine Room Main Wire / Transmission Wire>Eco-Run Vehicle Converter Assemblyewd_type=component;type=c;code=A100;pinno=3
A100-3 (ACC) - Body ground	Ignition switch ACC	9.5 to 14 V

Tester Connection

Condition

Specified Condition

Click Location & Routing(A100)Location & Routingewd_type=routing;type=c;code=A100

Click Connector(A100)Engine Compartment>Engine Room Main Wire / Transmission Wire>Eco-Run Vehicle Converter Assemblyewd_type=component;type=c;code=A100;pinno=3

A100-3 (ACC) - Body ground

Ignition switch ACC

9.5 to 14 V

Turn the ignition switch off.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
Click Location & Routing(A100)Location & Routingewd_type=routing;type=c;code=A100 Click Connector(A100)Engine Compartment>Engine Room Main Wire / Transmission Wire>Eco-Run Vehicle Converter Assemblyewd_type=component;type=c;code=A100;pinno=3
A100-3 (ACC) - Body ground	Ignition switch off	0 to 1 V

Tester Connection

Condition

Specified Condition

Click Location & Routing(A100)Location & Routingewd_type=routing;type=c;code=A100

Click Connector(A100)Engine Compartment>Engine Room Main Wire / Transmission Wire>Eco-Run Vehicle Converter Assemblyewd_type=component;type=c;code=A100;pinno=3

A100-3 (ACC) - Body ground

Ignition switch off

0 to 1 V

Result:

Proceed to
OK
NG

9.CHECK HARNESS AND CONNECTOR (EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) - BODY GROUND)

12.CHECK HARNESS AND CONNECTOR (EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) - POWER DISTRIBUTION BOX ASSEMBLY)

9.CHECK HARNESS AND CONNECTOR (EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) - BODY GROUND)

Disconnect the external backup boost converter (eco run vehicle converter assembly) connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(A100)Location & Routingewd_type=routing;type=c;code=A100 Click Connector(A100)Engine Compartment>Engine Room Main Wire / Transmission Wire>Eco-Run Vehicle Converter Assemblyewd_type=component;type=c;code=A100;pinno=6
A100-6 (GND) - Body ground	Always	Below 1 Ω

Tester Connection

Condition

Specified Condition

Click Location & Routing(A100)Location & Routingewd_type=routing;type=c;code=A100

Click Connector(A100)Engine Compartment>Engine Room Main Wire / Transmission Wire>Eco-Run Vehicle Converter Assemblyewd_type=component;type=c;code=A100;pinno=6

A100-6 (GND) - Body ground

Always

Below 1 Ω

Result:

Proceed to
OK
NG

10.CHECK HARNESS AND CONNECTOR (EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) - EACH ECU OR SENSOR)

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.CHECK HARNESS AND CONNECTOR (EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) - EACH ECU OR SENSOR)

Disconnect the external backup boost converter (eco run vehicle converter assembly) connector.

Disconnect the connector from the corresponding system ECU/sensor.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(A100,K2)Location & Routingewd_type=routing;type=c,c;code=A100,K2 Click Connector(A100)Engine Compartment>Engine Room Main Wire / Transmission Wire>Eco-Run Vehicle Converter Assemblyewd_type=component;type=c;code=A100;pinno=5 Click Connector(K2)Body>Floor Wire>Stereo Component Amplifier Assemblyewd_type=component;type=c;code=K2;pinno=1,16
A100-5 (BO1) - K2-1 (+B)	Always	Below 1 Ω
A100-5 (BO1) - K2-16 (+B2)	Always	Below 1 Ω
A100-5 (BO1) or K2-1 (+B) or K2-16 (+B2) - Body ground and other terminals	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

11.CHECK EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) (OUTPUT VOLTAGE FOR EACH SYSTEM)

REPAIR OR REPLACE HARNESS OR CONNECTOR

11.CHECK EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) (OUTPUT VOLTAGE FOR EACH SYSTEM)

Disconnect the connector from the corresponding system ECU/sensor.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
Click Location & Routing(K2)Location & Routingewd_type=routing;type=c;code=K2 Click Connector(K2)Body>Floor Wire>Stereo Component Amplifier Assemblyewd_type=component;type=c;code=K2;pinno=1,16
K2-1 (+B) - Body ground	Always	10.5 to 16 V
K2-16 (+B2) - Body ground	Always	10.5 to 16 V

Tester Connection

Condition

Specified Condition

Click Location & Routing(K2)Location & Routingewd_type=routing;type=c;code=K2

Click Connector(K2)Body>Floor Wire>Stereo Component Amplifier Assemblyewd_type=component;type=c;code=K2;pinno=1,16

K2-1 (+B) - Body ground

Always

10.5 to 16 V

K2-16 (+B2) - Body ground

Always

10.5 to 16 V

Result:

Proceed to
OK
NG

CHECK POWER SOURCE CIRCUIT (POWER SOURCE CIRCUIT OF RELATED SYSTEM)

REPLACE EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY)

Click hereEngine / Hybrid System>STOP AND START>BACKUP BOOST CONVERTER>REMOVAL202406,999999,_51,_111803,_0501592,RM100000002MPW3,

12.CHECK HARNESS AND CONNECTOR (EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) - POWER DISTRIBUTION BOX ASSEMBLY)

Disconnect the external backup boost converter (eco run vehicle converter assembly) connector.

Disconnect the power distribution box assembly connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(A100)Location & Routingewd_type=routing;type=c;code=A100 Click Connector(A100)Engine Compartment>Engine Room Main Wire / Transmission Wire>Eco-Run Vehicle Converter Assemblyewd_type=component;type=c;code=A100;pinno=3
A100-3 (ACC) - 4B-12	Always	Below 1 Ω
A100-3 (ACC) or 4B-12 - Body ground and other terminals	Always	10 kΩ or higher

Tester Connection

Condition

Specified Condition

Click Location & Routing(A100)Location & Routingewd_type=routing;type=c;code=A100

Click Connector(A100)Engine Compartment>Engine Room Main Wire / Transmission Wire>Eco-Run Vehicle Converter Assemblyewd_type=component;type=c;code=A100;pinno=3

A100-3 (ACC) - 4B-12

Always

Below 1 Ω

A100-3 (ACC) or 4B-12 - Body ground and other terminals

Always

10 kΩ or higher

Result:

Proceed to
OK
NG

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL202406,999999,_57,_111828,_0500082,RM100000002MQ55,

REPAIR OR REPLACE HARNESS OR CONNECTOR

13.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - BBC NO. 1, BBC NO. 2 FUSES)

Disconnect the engine stop and start ECU connector.

Remove the BBC NO. 1 and BBC NO. 2 fuses from the NO. 1 engine room relay block and NO. 1 junction block assembly

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(A105)Location & Routingewd_type=routing;type=c;code=A105 Click Connector(A105)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A105;pinno=1,3
A105-1 (BIN2) - BBC NO. 2 fuse terminal 2	Always	Below 1 Ω
A105-3 (BIN1) - BBC NO. 1 fuse terminal 2	Always	Below 1 Ω
A105-1 (BIN2) - Body ground	Always	10 kΩ or higher
A105-3 (BIN1) - Body ground	Always	10 kΩ or higher
BBC NO. 2 fuse terminal 2 - Body ground	Always	10 kΩ or higher
BBC NO. 1 fuse terminal 2 - Body ground	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

14.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - EACH ECU OR SENSOR)

REPAIR OR REPLACE HARNESS OR CONNECTOR

14.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - EACH ECU OR SENSOR)

Disconnect the engine stop and start ECU connector.

Disconnect the meter mirror sub-assembly connector.(w/ Headup Display System)

Disconnect the clearance warning ECU assembly connector. (w/ Parking Support Brake System)

Disconnect the tire pressure warning ECU and receiver connector.

Disconnect the inner rear view mirror assembly connector.

Disconnect the air conditioning control assembly connector.

Disconnect the millimeter wave radar sensor assembly connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
1: w/ Digital rear-view mirror system 2: w/ EC Mirror 3: w/ Parking Support Brake System 4: w/ Headup display system
Click Location & Routing(A104,B5,Q1,Q16,E51,E22,K7,E160)Location & Routingewd_type=routing;type=c,c,c,c,c,c,c,c;code=A104,B5,Q1,Q16,E51,E22,K7,E160 Click Connector(A104)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A104;pinno=3,2,11 Click Connector(B5)Engine Compartment>No. 4 Engine Room Wire / No. 2 Engine Wire / No. 3 Engine Wire / No. 5 Engine Wire / No. 6 Engine Wire / Sensor Wire>Millimeter Wave Radar Sensor Assemblyewd_type=component;type=c;code=B5;pinno=8 Click Connector(Q1)Body>Roof Wire>Inner Rear View Mirror Assemblyewd_type=component;type=c;code=Q1;pinno=1,6 Click Connector(Q16)Body>Roof Wire>Inner Rear View Mirror Assemblyewd_type=component;type=c;code=Q16;pinno=4 Click Connector(E51)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Clearance Warning ECU Assemblyewd_type=component;type=c;code=E51;pinno=1 Click Connector(E22)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Air Conditioning Control Assemblyewd_type=component;type=c;code=E22;pinno=9 Click Connector(K7)Body>Floor Wire>Electrical Key and Tire Pressure Monitoring System Receiver Assemblyewd_type=component;type=c;code=K7;pinno=1,7 Click Connector(E160)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Meter Mirror Sub-Assemblyewd_type=component;type=c;code=E160;pinno=1,2
A104-3 (IG41) - B5-8 (IGB)	Always	Below 1 Ω
A104-3 (IG41) - Q1-1 (IG)*1	Always	Below 1 Ω
A104-3 (IG41) - Q16-4 (IG)*2	Always	Below 1 Ω
A104-3 (IG41) - E51-1 (IG)*3	Always	Below 1 Ω
A104-3 (IG41) - E22-9 (IG+)	Always	Below 1 Ω
A104-3 (IG41) - K7-1 (IG)	Always	Below 1 Ω
A104-3 (IG41) - E160-1 (IG)*4	Always	Below 1 Ω
A104-2 (B41) - K7-7 (+B)	Always	Below 1 Ω
A104-11 (B43) - E160-2 (B)*4	Always	Below 1 Ω
A104-11 (B43) - Q1-6 (+B)*1	Always	Below 1 Ω
A104-3 (IG41) - Body ground	Always	10 kΩ or higher
A104-2 (B41) - Body ground	Always	10 kΩ or higher
A104-11 (B43) - Body ground	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

15.CHECK ENGINE STOP AND START ECU

REPAIR OR REPLACE HARNESS OR CONNECTOR

15.CHECK ENGINE STOP AND START ECU

Disconnect the engine stop and start ECU connectors.

4.927,0.479 5.406,0.792 0.479,0.313 3.146,0.479 3.625,0.792 0.479,0.313 3.427,2.302 3.635,1.344 true 5.604,2.281 5.563,1.448 true 5.698,1.448 6.073,2.25 true 4.656,1.458 4.885,2.271 true 3.219,2.333 3.833,2.531 0.615,0.198 10 false DGND 5.469,2.333 6.083,2.5 0.615,0.167 10 false IG41 3.229,0.563 3.688,0.76 0.458,0.198 10 false A106 5.01,0.563 5.469,0.76 0.458,0.198 10 false A104 0.104,0.083 0.719,0.281 0.615,0.198 10 false *a 6.021,2.313 6.479,2.51 0.458,0.198 10 false B41 4.802,2.344 5.26,2.542 0.458,0.198 10 false B43

Component without harness connected
(Engine Stop and Start ECU)

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(A104,A106)Location & Routingewd_type=routing;type=c,c;code=A104,A106 Click Connector(A104)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A104;pinno=3,2,11 Click Connector(A106)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A106;pinno=6
A104-3 (IG41) - A106-6 (DGND)	Always	10 kΩ or higher
A104-2 (B41) - A106-6 (DGND)	Always	10 kΩ or higher
A104-11 (B43) - A106-6 (DGND)	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

16.CHECK VEHICLE CONDITION (B41, B43 AND IG41 CIRCUIT)

REPLACE ENGINE STOP AND START ECU

Click hereEngine / Hybrid System>STOP AND START>ENGINE STOP AND START ECU>REMOVAL202406,999999,_51,_111803,_0501591,RM100000002MPW2,

16.CHECK VEHICLE CONDITION (B41, B43 AND IG41 CIRCUIT)

Check that additional devices installed to the vehicle (aftermarket audio system, etc.) are not connected to the B41, B43 or IG41 terminal circuit of the engine stop and start ECU.

Result:

Result	Proceed to
Load from an additional device installed to the vehicle (aftermarket audio system, etc.) is not applied.	A
Load from an additional device installed to the vehicle (aftermarket audio system, etc.) is applied.	B

TROUBLESHOOT ECUS CONNECTED TO TERMINALS B41, B43 AND IG41

END (REMOVE ADDITIONAL DEVICE)