RM35X0E _51 Engine / Hybrid System _078825 STOP AND START _0382334 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:
·

Front radar sensor system

·

Dynamic radar cruise cintrol system

·

Electronically controlled brake system

·

Pre-collision system

·

Audio and visual system

·

Navigation system

·

Digital rear-view mirror system

·

Wireless door lock control system

·

Lighting system (INT)

·

CAN communication system

·

Meter / gauge system

·

Panoramic view monitor system

·

Front camera system

·

Tire pressure warning system

·

Blind spot monitor system



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>REGISTRATION

·

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>REGISTRATION

·

After replacing the engine stop and start ECU or airbag sensor assembly, clear and calibrate the deceleration sensor zero point in the engine stop and start ECU.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>REGISTRATION

·

for Automatic Transmission:

When the engine stop and start ECU or electromagnetic oil pump is replaced, check the electromagnetic oil pump.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>REGISTRATION

·

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



PROCEDURE

1.CHECK PROBLEM SYMPTOMS
a.

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*1


Backup boost converter internal malfunction
·

Internal power source malfunction

·

Internal power source overvoltage

·

CPU duty malfunction

·

Communication cycle error


Stop and start control prohibited P323A00
P323AA2
P323B29
P323B38 		Blinks Systems stop operating during engine restart as the backup boost converter output voltage cannot be boosted A
Battery voltage drop
Systems on the converter output side do not operate
B41 terminal: All of the following will not operate
·

Wireless door lock control system

·

Digital rear-view mirror system

·

Lighting system (INT)

·

Panoramic view monitor system*2

·

Tire pressure warning system


B42 terminal:

The audio and visual system will not operate


B43 terminal:

The navigation system will not operate


IG41 terminal: All of the following will not operate
·

CAN communication system

·

Main body ECU (Multiplex network body ECU)

·

Front radar sensor system

·

Panoramic view monitor system*2

·

Dynamic radar cruise cintrol system

·

Blind spot monitor system

·

Tire pressure warning system


EMOP terminal:

The electromagnetic oil pump will not operate


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) 		P323A19 Blinks Systems do not operate as power supply from the converter is cut off A
Systems do not operate
(Due to converter input side malfunction)
IG1 terminal: All of the following will not operate
·

Front radar sensor system

·

Dynamic radar cruise cintrol system

·

Electronically controlled brake system

·

Panoramic view monitor system*2

·

CAN communication system

·

Pre-collision system

·

Front camera system

·

Main Body ECU (Multiplex Network Body ECU)

·

Tire pressure warning system

·

Blind spot monitor system


IG2 terminal:

The meter / gauge system will not operate


ACC terminal: All of the following will not operate
·

Audio and visual system

·

Panoramic view monitor system*2

·

Navigation system (for Wagon, 12 speakers)*2


Converter input circuit malfunction
·

Open or short to GND in IG1 circuit

·

Open or short to GND in IG2 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)
AC41 terminal: All of the following will not operate
·

Audio and visual system

·

Panoramic view monitor system*2

·

Navigation system (for Wagon, 12 speakers)*2


IG11 terminal: All of the following will not operate
·

The pre-collision system

·

Dynamic radar cruise cintrol system

·

Front camera system


IG12 terminal:

The meter / gauge system will not operate


IG31 terminal: All of the following will not operate
·

The electronically controlled brake system

·

Dynamic radar cruise cintrol system


IG41 terminal: All of the following will not operate
·

CAN communication system

·

Main body ECU (Multiplex network body ECU)

·

Front radar sensor system

·

Panoramic view monitor system

·

Dynamic radar cruise cintrol system

·

Tire pressure warning system

·

Blind spot monitor system


B41 terminal: All of the following will not operate
·

Wireless door lock control system

·

Digital rear-view mirror system

·

Lighting system (INT)

·

Panoramic view monitor system

·

Tire pressure warning system


B42 terminal:

The audio and visual system will not operate


B43 terminal:

The navigation 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
·

Front radar sensor system

·

Electronically controlled brake system

·

Pre-collision system

·

Audio and visual system

·

Navigation system

·

Digital rear-view mirror system

·

Wireless door lock control system

·

Lighting system (INT)

·

CAN communication system

·

Meter / gauge system

·

Panoramic view monitor system

·

Dynamic radar cruise cintrol system

·

Front camera system

·

Tire pressure warning system

·

Blind spot monitor system


·

Open in BBC fuse circuit

·

Short in converter circuit

·

Backup boost converter malfunction


Stop and start control prohibited P061519 Does not blink (Due to disabled meter / gauge system) All systems that the converter supplies power to do not operate (see circuit diagram) A
P30DF62
P30EF4B
P323A00
P323A16
P323AA2
P323B29
P323B38
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 (for Wagon, 12 speakers)


·

Open in PA-BBC 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)

·

Communication error DTCs may be stored due to short between AC41 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

·

Short between AC41 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 IG (short between IG1 or IG2 and +B)


Engine stop and start ECU power source circuit malfunction
·

Short between ACC and +B

·

Short between IG1 and +B

·

Short between IG2 and +B


- - Does not blink Ignition switch cannot be turned off B

*1: A DTC may be stored in the power steering system

*2: Production date from 2019/06 to 2023/10



Result:
Proceed to
A
B
C
D



A

GO TO DIAGNOSTIC TROUBLE CODE CHART

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>DIAGNOSTIC TROUBLE CODE CHART


B

2.CHECK HARNESS AND CONNECTOR (BIN1 AND BIN2 TERMINALS POWER SOURCE CIRCUIT)

C

7.CHECK AUDIO AND VISUAL SYSTEM

D

10.CHECK HARNESS AND CONNECTOR (BIN TERMINAL POWER SOURCE CIRCUIT)
2.CHECK HARNESS AND CONNECTOR (BIN1 AND BIN2 TERMINALS POWER SOURCE CIRCUIT)
A346333
1.469,0.219 1.958,0.5 0.49,0.281 1.042,1.5 0.75,1.875 true 1.458,1.896 1.167,1.156 true 1.594,0.271 2.052,0.469 0.458,0.198 10 false N31 0.146,0.146 0.458,0.344 0.313,0.198 10 false *a 0.573,1.927 1,2.146 0.427,0.219 10 false BIN1 1.333,1.938 1.76,2.156 0.427,0.219 10 false BIN2
*a Front view of wire harness connector
(to Engine Stop and Start ECU)


a.

Disconnect the engine stop and start ECU connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
N31-1 (BIN2) - Body ground Always 9.5 to 14 V
N31-3 (BIN1) - Body ground Always 9.5 to 14 V



Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (IG1 AND ACC TERMINALS POWER SOURCE CIRCUIT)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE STOP AND START ECU - BATTERY)

3.CHECK HARNESS AND CONNECTOR (IG1 AND ACC TERMINALS POWER SOURCE CIRCUIT)
A436064
1.469,0.396 1.958,0.688 0.49,0.292 2.021,1.49 2.052,1.854 true 1.573,1.479 1.438,1.854 true 1.583,0.469 2.031,0.646 0.448,0.177 10 false N33 0.094,0.104 0.406,0.302 0.313,0.198 10 false *a 1.948,1.896 2.333,2.115 0.385,0.219 10 false IG1 1.333,1.896 1.719,2.115 0.385,0.219 10 false ACC
*a Front view of wire harness connector
(to Engine Stop and Start ECU)


a.

Disconnect the engine stop and start ECU connector.


b.

Turn the Ignition switch to ACC.


c.

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

Standard Voltage:
Tester Connection Condition Specified Condition
N33-19 (ACC) - Body ground Ignition switch ACC 9.5 to 14 V



d.

Turn the ignition switch to ON.


e.

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

Standard Voltage:
Tester Connection Condition Specified Condition
N33-21 (IG1) - Body ground Ignition switch ON 9.5 to 14 V



f.

Turn the ignition switch to off.


g.

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

Standard Voltage:
Tester Connection Condition Specified Condition
N33-19 (ACC) - Body ground ignition switch off 0 to 1 V
N33-21 (IG1) - Body ground ignition switch off 0 to 1 V



Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (+B TERMINAL POWER SOURCE CIRCUIT)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE STOP AND START ECU - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG1-NO.1 OR ACC RELAY))

4.CHECK HARNESS AND CONNECTOR (+B TERMINAL POWER SOURCE CIRCUIT)
A346332C43
1.615,0.417 2.031,0.656 0.417,0.24 0.781,1.208 0.688,1.719 true 1.698,0.458 2.156,0.656 0.458,0.198 10 false N32 0.156,0.125 0.469,0.323 0.313,0.198 10 false *a 0.563,1.76 0.875,1.958 0.313,0.198 10 false +B
*a Front view of wire harness connector
(to Engine Stop and Start ECU)


a.

Disconnect the engine stop and start ECU connector.


b.

Turn the ignition switch to ON.


c.

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

Standard Voltage:
Tester Connection Condition Specified Condition
N32-1 (+B) - Body ground Ignition switch ON 9.5 to 14 V



d.

Turn the ignition switch to off.


e.

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

Standard Voltage:
Tester Connection Condition Specified Condition
N32-1 (+B) - Body ground Ignition switch off 0 to 1 V



Result:
Proceed to
OK
NG



OK

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE STOP AND START ECU - EFI-MAIN NO. 1 RELAY)

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

Disconnect the connector from the corresponding system ECU/sensor.


b.

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

Standard Resistance:
Radio and Display Receiver Assembly (Production date from 2019/06 to 2023/10)
Tester Connection Condition Specified Condition
N33-12 (B42) - O5-4 (+B1) Always Below 1 Ω
N33-24 (AC41) - O5-15 (ACC1) Always Below 1 Ω
N33-12 (B42) or O5-4 (+B1) - Body ground and other terminals Always 10 kΩ or higher
N33-24 (AC41) or O5-15 (ACC1) - Body ground and other terminals Always 10 kΩ or higher

Radio and Display Receiver Assembly (Production date from 2023/10)
Tester Connection Condition Specified Condition
N33-12 (B42) - O5-4 (+B1) Always Below 1 Ω
N33-12 (B42) or O5-4 (+B1) - Body ground and other terminals Always 10 kΩ or higher

Parking Assist ECU (w/ Panoramic view monitor system)(Production date from 2019/06 to 2023/10)
Tester Connection Condition Specified Condition
N33-24 (AC41) - N151-3 (ACC) Always Below 1 Ω
N33-3 (IG41) - N151-21 (IG) Always Below 1 Ω
N33-2 (B41) - N151-1 (+B) Always Below 1 Ω
N33-2 (B41) - N151-19 (+B2) Always Below 1 Ω
N33-24 (B42) or N151-3 (ACC) - Body ground and other terminals Always 10 kΩ or higher
N33-3 (AC41) or N151-21 (IG) - Body ground and other terminals Always 10 kΩ or higher
N33-2 (B41) or N151-1 (+B) - Body ground and other terminals Always 10 kΩ or higher
N33-2 (B41) or N151-19 (+B2) - Body ground and other terminals Always 10 kΩ or higher

Stereo Component Amplifier Assembly (w/ Navigation System, for Wagon, 12 Speakers)(Production date from 2019/06 to 2023/10)
Tester Connection Condition Specified Condition
N33-24 (AC41) - N169-12 (ACC) Always Below 1 Ω
N33-24 (IG41) or N169-12 (ACC) - Body ground and other terminals Always 10 kΩ or higher

Network Gateway ECU
Tester Connection Condition Specified Condition
N33-3 (IG41) - N21-11 (IG1) Always Below 1 Ω
N33-3 (IG41) or N21-11 (IG1) - Body ground and other terminals Always 10 kΩ or higher

Instrument Panel Junction Block Assembly (Main Body ECU (Multiplex Network Body ECU))
Tester Connection Condition Specified Condition
N33-3 (IG41) - 3A-15 Always Below 1 Ω
N33-3 (IG41) or 3A-15 - Body ground and other terminals Always 10 kΩ or higher

Millimeter Wave Radar Sensor Assembly (w/ Front radar sensor system)
Tester Connection Condition Specified Condition
N33-3 (IG41) - A3-8 (IGB) Always Below 1 Ω
N33-3 (IG41) or A3-8 (IGB) - Body ground and other terminals Always 10 kΩ or higher

Navigation ECU (w/ Navigation system)
Tester Connection Condition Specified Condition
N33-11 (B43) - O9-10 (+B) Always Below 1 Ω
N33-11 (B43) or O9-10 (+B) - Body ground and other terminals Always 10 kΩ or higher

Skid Control ECU (Brake Actuator Assembly)
Tester Connection Condition Specified Condition
N33-1 (IG31) - A28-28 (IG1) Always Below 1 Ω
N33-1 (IG31) or A28-28 (IG1) - Body ground and other terminals Always 10 kΩ or higher

Steering Sensor
Tester Connection Condition Specified Condition
N33-1 (IG31) - N3-9 (IG1) Always Below 1 Ω
N33-1 (IG31) or N3-9 (IG1) - Body ground and other terminals Always 10 kΩ or higher

Combination Meter Assembly
Tester Connection Condition Specified Condition
N33-10 (IG12) - N22-38 (IG+) Always Below 1 Ω
N33-10 (IG12) or N22-38 (IG+) - Body ground and other terminals Always 10 kΩ or higher

Forward Recognition Camera
Tester Connection Condition Specified Condition
N33-6 (IG11) - a9-7 (IGB) Always Below 1 Ω
N33-6 (IG11) or a9-7 (IGB) - Body ground and other terminals Always 10 kΩ or higher

Door Control Receiver (w/ Wireless Door Lock Control System)
Tester Connection Condition Specified Condition
N33-2 (B41) - b2-5 (+B) Always Below 1 Ω
N33-2 (B41) or b2-5 (+B) - Body ground and other terminals Always 10 kΩ or higher

Inner Rear View Mirror Assembly (w/ Digital Rear-View Mirror System)
Tester Connection Condition Specified Condition
N33-2 (B41) - a5-6 (+B) Always Below 1 Ω
N33-2 (B41) or a5-6 (+B) - Body ground and other terminals Always 10 kΩ or higher

No. 1 Integration Relay (DOME CUT NO.2 relay)
Tester Connection Condition Specified Condition
N33-2 (B41) - 1C-7 Always Below 1 Ω
N33-2 (B41) - 1C-8 Always Below 1 Ω
N33-2 (B41) or 1C-7 - Body ground and other terminals Always 10 kΩ or higher
N33-2 (B41) or 1C-8 - Body ground and other terminals Always 10 kΩ or higher

Blind Spot Monitor Sensor LH (w/ Blind Spot Monitor System)
Tester Connection Condition Specified Condition
N33-3 (IG41) - e2-5 (BLB) Always Below 1 Ω
N33-3 (IG41) or e2-5 (BLB) - Body ground and other terminals Always 10 kΩ or higher

Blind Spot Monitor Sensor RH (w/ Blind Spot Monitor System)
Tester Connection Condition Specified Condition
N33-3 (IG41) - e3-5 (BRB) Always Below 1 Ω
N33-3 (IG41) or e3-5 (BRB) - Body ground and other terminals Always 10 kΩ or higher

Tire Pressure Warning ECU and Receiver (w/ Tire Pressure Warning System)
Tester Connection Condition Specified Condition
N33-2 (B41) - Z30-7 (+B) Always Below 1 Ω
N33-3 (IG41) - Z30-1 (IG) Always Below 1 Ω
N33-2 (B41) or Z30-7 (IG) - Body ground and other terminals Always 10 kΩ or higher
N33-3 (IG41) or Z30-1 (IG) - Body ground and other terminals Always 10 kΩ or higher

Inner Rear View Mirror Assembly (w/ Rear View Mirror System)
Tester Connection Condition Specified Condition
N33-3 (IG41) - a7-6 (IG) Always Below 1 Ω
N33-3 (IG41) or a7-6 (IG) - Body ground and other terminals Always 10 kΩ or higher

NO. 1 Interior Illumination Light Assembly (Slide Door Illumination)
Tester Connection Condition Specified Condition
N33-2 (B41) - U10-1 (ILL+) Always Below 1 Ω
N33-2 (B41) or U10-1 (ILL+) - Body ground and other terminals Always 10 kΩ or higher

NO. 2 Interior Illumination Light Assembly (Slide Door Illumination)
Tester Connection Condition Specified Condition
N33-2 (B41) - U12-1 (ILL+) Always Below 1 Ω
N33-2 (B41) or U12-1 (ILL) - Body ground and other terminals Always 10 kΩ or higher

NO. 1 Interior Illumination Light Assembly (Quarter Trim Illumination)
Tester Connection Condition Specified Condition
N33-2 (B41) - W31-1 (ILL+) Always Below 1 Ω
N33-2 (B41) or W31-1 (ILL+) - Body ground and other terminals Always 10 kΩ or higher

NO. 2 Interior Illumination Light Assembly (Quarter Trim Illumination)
Tester Connection Condition Specified Condition
N33-2 (B41) - V29-1 (ILL+) Always Below 1 Ω
N33-2 (B41) or V29-1 - Body ground and other terminals Always 10 kΩ or higher

Spot Light Assembly (for Front LH)
Tester Connection Condition Specified Condition
N33-2 (B41) - a26-5 (+) Always Below 1 Ω
N33-2 (B41) or a26-5 (+) - Body ground and other terminals Always 10 kΩ or higher

Spot Light Assembly (for Rear LH)
Tester Connection Condition Specified Condition
N33-2 (B41) - a35-5 (+) Always Below 1 Ω
N33-2 (B41) or a35-5 (+) - Body ground and other terminals Always 10 kΩ or higher

Spot Light Assembly (for Front RH)
Tester Connection Condition Specified Condition
N33-2 (B41) - a25-5 (+) Always Below 1 Ω
N33-2 (B41) or a25-5 (+) - Body ground and other terminals Always 10 kΩ or higher

Spot Light Assembly (for Rear RH)
Tester Connection Condition Specified Condition
N33-2 (B41) - a34-5 (+) Always Below 1 Ω
N33-2 (B41) or a34-5 (+) - Body ground and other terminals Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

6.CHECK ENGINE STOP AND START ECU (OUTPUT VOLTAGE FOR EACH ECU OR SENSOR)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK ENGINE STOP AND START ECU (OUTPUT VOLTAGE FOR EACH ECU OR SENSOR)
a.

Disconnect the connector from the corresponding system ECU/sensor.


b.

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
O5-4 (+B1) - Body ground Always 10.5 to 16 V
O9-10 (+B) - Body ground*1 Always 10.5 to 16 V
b2-5 (+B) - Body ground*2 Always 10.5 to 16 V
a5-6 (+B) - Body ground*3 Always 10.5 to 16 V
U10-1 (ILL+) - Body ground Always 10.5 to 16 V
U12-1 (ILL+) - Body ground Always 10.5 to 16 V
W31-1 (ILL+) - Body ground Always 10.5 to 16 V
V29-1 (ILL+) - Body ground Always 10.5 to 16 V
a26-5 (+) - Body ground Always 10.5 to 16 V
a25-5 (+) - Body ground Always 10.5 to 16 V
a35-5 (+) - Body ground Always 10.5 to 16 V
a34-5 (+) - Body ground Always 10.5 to 16 V
Z30-7 (+B) - Body ground*4 Always 10.5 to 16 V
N151-1 (+B) - Body ground*5*10 Always 10.5 to 16 V
N151-19 (+B2) - Body ground*5*10 Always 10.5 to 16 V



c.

Turn the ignition switch to ACC.


d.

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

HINT:

Measure the voltage at the corresponding terminals.


Standard Voltage (Production date from 2019/06 to 2023/10):
Tester Connection Condition Specified Condition
O5-15 (ACC1) - Body ground Ignition switch ACC 10.5 to 16 V
N151-3 (ACC)*5 - Body ground Ignition switch ACC 10.5 to 16 V
N169-12 (ACC)*6 - Body ground Ignition switch ACC 10.5 to 16 V



e.

Turn the ignition switch to ON.


f.

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
N21-11 (IG1) - Body ground Ignition switch ON 10.5 to 16 V
Z30-1 (IG) - Body ground*4 Ignition switch ON 10.5 to 16 V
A28-28 (IG1) - Body ground Ignition switch ON 10.5 to 16 V
N3-9 (IG1) - Body ground Ignition switch ON 10.5 to 16 V
N22-38 (IG+) - Body ground Ignition switch ON 10.5 to 16 V
a9-7 (IGB) - Body ground Ignition switch ON 10.5 to 16 V
N151-21 (IG) - Body ground*5*10 Ignition switch ON 10.5 to 16 V
A3-8 (IGB) - Body ground*7 Ignition switch ON 10.5 to 16 V
a7-6 (IG) - Body ground*8 Ignition switch ON 10.5 to 16 V
e2-5 (BLB) - Body ground*9 Ignition switch ON 10.5 to 16 V
e3-5 (BRB) - Body ground*9 Ignition switch ON 10.5 to 16 V



*1: w/ Navigation System

*2: w/ Wireless Door Lock Control System

*3: w/ Digital Rear-View Mirror System

*4: w/ Tire Pressure Warning System

*5: w/ Panoramic view monitor system

*6: w/ Navigation System, for Wagon, 12 Speakers

*7: w/ Front Radar Sensor System

*8: w/ Rear View Mirror System

*9: w/ Blind Spot Monitor System

*10: Production date from 2019/06 to 2023/10


Result:
Proceed to
OK
NG



OK

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

NG

REPLACE ENGINE STOP AND START ECU

Click hereEngine / Hybrid System>STOP AND START>ENGINE STOP AND START ECU>REMOVAL


7.CHECK AUDIO AND VISUAL SYSTEM
a.

Turn the ignition switch off and wait for 1 minute.


b.

Turn the ignition switch to ON.


c.

Lower the audio volume.


d.

Check if the audio and visual system operates normally.

OK:

Audio and visual system operates normally.



Result:
Proceed to
OK
NG



OK

END

NG

8.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - RADIO AND DISPLAY RECEIVER ASSEMBLY)
8.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - RADIO AND DISPLAY RECEIVER ASSEMBLY)
a.

Disconnect the engine stop and start ECU connector.


b.

Disconnect the radio and display receiver assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
N33-12 (B42) or O5-4 (+B1) - Body ground Always 10 kΩ or higher



Result:
Result Proceed to
OK (w/ Navigation System, for Wagon, 12 Speakers) A
OK (Except Navigation System, for Wagon, 12 Speakers) B
NG C



A

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

B

GO TO AUDIO AND VISUAL SYSTEM (FOR RADIO AND DISPLAY TYPE)

Click hereAudio / Visual / Telematics>AUDIO / VIDEO>AUDIO AND VISUAL SYSTEM (for Radio and Display Type)>HOW TO PROCEED WITH TROUBLESHOOTING


C

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

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


b.

Disconnect the stereo component amplifier assembly connectors.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
N145-5 (BO1) or N170-16 (+B2) - Body ground and other terminals Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

GO TO NAVIGATION SYSTEM

Click hereAudio / Visual / Telematics>NAVIGATION / MULTI INFO DISPLAY>NAVIGATION SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.CHECK HARNESS AND CONNECTOR (BIN TERMINAL POWER SOURCE CIRCUIT)
A331558
1.5,0.167 1.917,0.417 0.417,0.25 2.031,1.885 2.031,1.406 true 1.948,1.917 2.406,2.115 0.458,0.198 10 false BIN 0.104,0.083 0.417,0.281 0.313,0.198 10 false *a 1.552,0.208 1.948,0.427 0.396,0.219 10 false N145
*a Front view of wire harness connector
(to External Backup Boost Converter (Eco Run Vehicle Converter Assembly))


a.

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


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
N145-11 (BIN) - Body ground Always 9.5 to 14 V



Result:
Proceed to
OK
NG



OK

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

NG

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

11.CHECK HARNESS AND CONNECTOR (ACC TERMINAL POWER SOURCE CIRCUIT)
A331558
1.479,0.167 1.896,0.417 0.417,0.25 1.146,1.875 1.542,1.198 true 1,1.927 1.458,2.125 0.458,0.198 10 false ACC 0.104,0.083 0.417,0.281 0.313,0.198 10 false *a 1.521,0.208 1.927,0.427 0.406,0.219 10 false N145
*a Front view of wire harness connector
(to External Backup Boost Converter (Eco Run Vehicle Converter Assembly))


a.

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


b.

Turn the Ignition switch to ACC.


c.

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

Standard Voltage:
Tester Connection Condition Specified Condition
N145-3 (ACC) - Body ground Ignition switch ACC 9.5 to 14 V



d.

Turn the ignition switch off.


e.

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

Standard Voltage:
Tester Connection Condition Specified Condition
N145-3 (ACC) - Body ground Ignition switch off 0 to 1 V



Result:
Proceed to
OK
NG



OK

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

NG

15.CHECK HARNESS AND CONNECTOR (EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
12.CHECK HARNESS AND CONNECTOR (EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) - BODY GROUND)
a.

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


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
N145-6 (GND) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

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


b.

Disconnect the stereo component amplifier assembly connectors.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
N145-5 (BO1) - N170-16 (+B2) Always Below 1 Ω
N145-5 (BO1), N170-16 (+B2) - Body ground and other terminals Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

14.CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY POWER SOURCE CIRCUIT)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

14.CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY POWER SOURCE CIRCUIT)
a.

Disconnect the stereo component amplifier assembly connectors.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
N170-16 (+B2) - Body ground Always 10.5 to 16 V
N169-12 (ACC)* - Body ground Ignition switch ACC 10.5 to 16 V


*: Production date from 2019/06 to 2023/10


Result:
Proceed to
OK
NG



OK

GO TO NAVIGATION SYSTEM

Click hereAudio / Visual / Telematics>NAVIGATION / MULTI INFO DISPLAY>NAVIGATION SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING


NG

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

Click hereEngine / Hybrid System>STOP AND START>BACKUP BOOST CONVERTER>REMOVAL


15.CHECK HARNESS AND CONNECTOR (EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
a.

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


b.

Disconnect the instrument panel junction block assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
N145-3 (ACC) - 3D-26 Always Below 1 Ω
N145-3 (ACC) or 3D-26 - Body ground and other terminals Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)