RM36D0EC _51 Engine / Hybrid System _083056 STOP AND START _0402418 STOP AND START SYSTEM C

STOP AND START  STOP AND START SYSTEM  P253014  Ignition Switch Circuit Short to Ground or Open  


DESCRIPTION

If the engine stop and start ECU receives the off signal from the ignition or starter switch assembly*1 or certification ECU (smart key ECU assembly)*2 when communication with the ECM is normal, the engine stop and start ECU will output DTC P253014.

*1: w/o Smart Entry and Start System

*2: w/ Smart Entry and Start System


DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory Note
P253014 Ignition Switch Circuit Short to Ground or Open All of the following conditions are met for 10 seconds or more (1 trip detection logic):
·

Ignition switch off signal is input.

·

Communication with the ECM is normal.

·

Ignition switch (communication) to ON.


·

Wire harness or connector

·

IGP relay

·

Ignition or starter switch assembly (w/o Smart Entry and Start System)

·

Certification ECU (Smart key ECU assembly) (w/ Smart Entry and Start System)

·

Engine stop and start ECU


Does not come on DTC stored SAE Code: P2531

CONFIRMATION DRIVING PATTERN

CONFIRMATION AFTER TROUBLESHOOTING


HINT:
·

If the cable is disconnected from the battery terminal, stop and start control is prohibited until refresh charge is completed.

In this case, let the vehicle idle to complete the refresh charge. The refresh charge is complete when the Data List item "Status of Battery Charge Control" changes from "Refresh Charge Mode". (Usually, idling the engine for 5 to 60 minutes with the battery fluid temperature at 11°C (51°F) or higher, the refresh charge will be completed.)

·

If the GTS is not available and the Data List item "Status of Battery Charge Control" cannot be checked, charge the battery by idling the engine for approximately 5 to 60 minutes or driving the vehicle, and then drive the vehicle and check that stop and start control operates.

If the engine is started with the hood open, the system determines that a jump start has occurred. Therefore, make sure that the hood is closed before starting the engine and driving the vehicle.

·

After the refresh charge completes, turn the ignition switch off, wait for at least 30 seconds, and then start the engine again. If the vehicle enters refresh charge mode again while the engine is idling, the initial refresh charge did not properly complete, so wait for the refresh charge to complete.

·

Allow the engine to idle for 3 minutes after it is warmed up and check that the engine idle speed is within 50 rpm of the target idle speed.



a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Clear the DTCs.

Powertrain > Stop and Start > Clear DTCs
50002 392

e.

Start the engine and warm it up.


f.

Drive the vehicle at 7 km/h (4 mph) or more.

CAUTION:

When performing Confirmation Driving Pattern, obey all speed limits and traffic laws.



g.

Depress the brake pedal and stop the vehicle.


h.

Keep the engine stopped by stop and start control for 10 seconds or more. (Keep the shift lever in D.)


i.

Release the brake pedal with the shift lever in D to start the engine.


j.

Check that DTCs are not output.

Powertrain > Stop and Start > Trouble Codes
50001 392


STOP AND START SYSTEM OPERATION CHECK


Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>OPERATION CHECK


WIRING DIAGRAM

w/ Smart Entry and Start System


A574938E01
1.313,6.76 4.313,7.042 3,0.281 10 false Certification ECU (Smart Key ECU Assembly) 1.208,6.552 1.667,6.75 0.458,0.198 10 false G170 2.031,6.281 2.49,6.479 0.458,0.198 10 false IGPD 1.583,6.292 2.042,6.49 0.458,0.198 10 false +B 2.469,6.177 2.927,6.375 0.458,0.198 10 false 24 1.417,6.167 1.76,6.458 0.344,0.292 10 false 6 0.635,2.063 1.281,2.573 0.646,0.51 10 false EFI-MAIN NO. 1 0.656,4.5 1.865,4.76 1.208,0.26 10 false IGP 0.635,6.729 1.844,6.99 1.208,0.26 10 false Battery 1.938,5.635 4.885,5.958 2.948,0.323 10 false Instrument Panel Junction Block Assembly 2.271,2.531 3.479,2.792 1.208,0.26 10 false EFI-MAIN NO. 1 4.604,0.917 5.188,1.406 0.583,0.49 10 false ECU-IGP NO. 1 3.75,2.021 5.104,2.333 1.354,0.313 10 false EFI NO. 1 4,5.042 5.354,5.354 1.354,0.313 10 false IGP 5.698,4.875 7.073,5.313 1.375,0.438 10 false Engine Stop and Start ECU 5.76,4.354 6.302,4.635 0.542,0.281 10 false A32 5.74,3.75 6.281,4.052 0.542,0.302 10 false A34 6.198,4.365 6.74,4.646 0.542,0.281 10 false IGP 6.188,3.74 6.729,4.021 0.542,0.281 10 false +B 5.823,3.542 6.365,3.823 0.542,0.281 10 false 1 5.792,4.156 6.333,4.438 0.542,0.281 10 false 18 6.323,2.771 6.865,3.052 0.542,0.281 10 false ECM 6.198,2.313 6.74,2.594 0.542,0.281 10 false MREL 6.188,0.729 6.729,1.01 0.542,0.281 10 false IGP 2.26,2.177 2.802,2.458 0.542,0.281 10 false 1 2.24,1.76 2.781,2.042 0.542,0.281 10 false 3 3.021,1.76 3.563,2.042 0.542,0.281 10 false 5 3.031,2.198 3.573,2.479 0.542,0.281 10 false 2 1.927,5.385 3.135,5.646 1.208,0.26 10 false 6B 1.896,4.719 3.104,4.979 1.208,0.26 10 false 6K 3.708,4.667 4.917,4.927 1.208,0.26 10 false 1 3.24,5.052 4.448,5.313 1.208,0.26 10 false 17 3.25,5.271 4.458,5.531 1.208,0.26 10 false 6C 3.25,4.76 4.458,5.021 1.208,0.26 10 false 6E 1.938,4.521 3.146,4.781 1.208,0.26 10 false 1 5.74,0.74 6.281,1.021 0.542,0.281 10 false A125 5.74,2.302 6.281,2.583 0.542,0.281 10 false A125 5.813,2.094 6.354,2.375 0.542,0.281 10 false 26 5.802,0.531 6.344,0.813 0.542,0.281 10 false 30 4.771,4.49 5.354,4.979 0.583,0.49 10 false ECU-IGP NO. 3 2.469,5.104 2.927,5.302 0.458,0.198 10 false AM2 3.25,4.563 4.458,4.823 1.208,0.26 10 false 13 4.438,4.677 4.979,4.958 0.542,0.281 10 false 2 4.448,4.26 4.99,4.542 0.542,0.281 10 false 3 3.698,4.25 4.24,4.531 0.542,0.281 10 false 5 1.948,5.177 3.156,5.438 1.208,0.26 10 false 9 0.417,4.854 1.677,5.115 1.26,0.26 10 false INP STD NO. 1-3


w/o Smart Entry and Start System


A574939E01
1.313,6.76 4.313,7.042 3,0.281 10 false Ignition or Starter Switch Assembly 1.365,6.604 1.823,6.802 0.458,0.198 10 false G28 2.344,6.188 2.802,6.385 0.458,0.198 10 false IG1 1.5,6.188 1.958,6.385 0.458,0.198 10 false AM1 2.635,6.188 3.094,6.385 0.458,0.198 10 false 8 1.354,6.188 1.698,6.479 0.344,0.292 10 false 7 0.635,2.063 1.281,2.573 0.646,0.51 10 false EFI-MAIN NO. 1 0.656,4.5 1.865,4.76 1.208,0.26 10 false IGP 0.635,6.729 1.844,6.99 1.208,0.26 10 false Battery 1.938,5.635 4.885,5.958 2.948,0.323 10 false Instrument Panel Junction Block Assembly 2.271,2.531 3.479,2.792 1.208,0.26 10 false EFI-MAIN NO. 1 4.604,0.917 5.188,1.406 0.583,0.49 10 false ECU-IGP NO. 1 3.75,2.021 5.104,2.333 1.354,0.313 10 false EFI NO. 1 4,5.042 5.354,5.354 1.354,0.313 10 false IGP 5.698,4.875 7.073,5.313 1.375,0.438 10 false Engine Stop and Start ECU 5.76,4.354 6.302,4.635 0.542,0.281 10 false A32 5.74,3.75 6.281,4.052 0.542,0.302 10 false A34 6.198,4.365 6.74,4.646 0.542,0.281 10 false IGP 6.188,3.74 6.729,4.021 0.542,0.281 10 false +B 5.823,3.542 6.365,3.823 0.542,0.281 10 false 1 5.792,4.156 6.333,4.438 0.542,0.281 10 false 18 6.323,2.771 6.865,3.052 0.542,0.281 10 false ECM 6.198,2.313 6.74,2.594 0.542,0.281 10 false MREL 6.188,0.729 6.729,1.01 0.542,0.281 10 false IGP 2.26,2.177 2.802,2.458 0.542,0.281 10 false 1 2.24,1.76 2.781,2.042 0.542,0.281 10 false 3 3.021,1.76 3.563,2.042 0.542,0.281 10 false 5 3.031,2.198 3.573,2.479 0.542,0.281 10 false 2 1.927,5.385 3.135,5.646 1.208,0.26 10 false 6B 1.896,4.719 3.104,4.979 1.208,0.26 10 false 6K 3.708,4.667 4.917,4.927 1.208,0.26 10 false 1 3.24,5.052 4.448,5.313 1.208,0.26 10 false 17 3.25,5.271 4.458,5.531 1.208,0.26 10 false 6C 3.25,4.76 4.458,5.021 1.208,0.26 10 false 6E 1.938,4.531 3.146,4.792 1.208,0.26 10 false 1 5.74,0.74 6.281,1.021 0.542,0.281 10 false A125 5.74,2.302 6.281,2.583 0.542,0.281 10 false A125 5.813,2.094 6.354,2.375 0.542,0.281 10 false 26 5.802,0.531 6.344,0.813 0.542,0.281 10 false 30 4.771,4.49 5.354,4.979 0.583,0.49 10 false ECU-IGP NO. 3 2.469,5.104 2.927,5.302 0.458,0.198 10 false AM2 3.25,4.563 4.458,4.823 1.208,0.26 10 false 13 4.438,4.677 4.979,4.958 0.542,0.281 10 false 2 4.448,4.26 4.99,4.542 0.542,0.281 10 false 3 3.698,4.25 4.24,4.531 0.542,0.281 10 false 5 1.948,5.177 3.156,5.438 1.208,0.26 10 false 9 0.417,4.854 1.677,5.115 1.26,0.26 10 false INP STD NO. 1-3


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 ECU 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

·

Bleed the oil pump with motor assembly (continuously variable transaxle assembly) after removing and installing the continuously variable transaxle assembly or replacing the CVT fluid.

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.



HINT:
·

Using the GTS, read the freeze frame data before troubleshooting. System condition information is recorded as freeze frame data the moment a DTC is stored. This information can be useful when troubleshooting.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>FREEZE FRAME DATA

·

DTCs for the stop and start system are not cleared even if the malfunction has been repaired. After repairing the malfunction, be sure to clear the DTCs.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>DTC CHECK / CLEAR



PROCEDURE

1.READ VALUE USING GTS (IG SWITCH)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Powertrain / Stop and Start / Data List / IG Switch.

Powertrain > Stop and Start > Data List
Tester Display
IG Switch
50003 392 203

e.

According to the display on the GTS, read the Data List.

Result:
GTS Display Result Proceed to
IG Switch ON A
OFF B




A

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


B

2.CHECK ENGINE STOP AND START ECU (IGP TERMINAL VOLTAGE)
2.CHECK ENGINE STOP AND START ECU (IGP TERMINAL VOLTAGE)
A450728C02
4.646,0.479 5.167,0.792 0.521,0.313 5.438,2.271 5.104,1.531 true 5.385,2.323 6.042,2.51 0.656,0.188 10 false IGP 0.104,0.073 0.885,0.271 0.781,0.198 10 false *a 4.76,0.531 5.135,0.729 0.375,0.198 10 false A32
*a Component with harness connected
(Engine Stop and Start ECU) 		- -


a.

Turn the ignition switch to ON.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
A32-18 (IGP) - Body ground Ignition switch ON 9.5 to 14 V



Result:
Proceed to
OK
NG



OK

3.CHECK ENGINE STOP AND START ECU (+B TERMINAL VOLTAGE)

NG

6.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - IGP RELAY)
3.CHECK ENGINE STOP AND START ECU (+B TERMINAL VOLTAGE)
A397704C56
3.26,0.094 3.646,0.365 0.385,0.271 4.104,0.688 4.302,1.479 true 0.865,0.135 1.177,0.333 0.313,0.198 10 false *a 4.313,1.458 4.927,1.656 0.615,0.198 10 false +B 3.344,0.156 3.958,0.354 0.615,0.198 10 false A34
*a Component with harness connected
(Engine Stop and Start ECU) 		- -


a.

Turn the ignition switch to ON.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
A34-1 (+B) - Body ground Ignition switch ON 9.5 to 14 V



Result:
Proceed to
OK
NG



OK

REPLACE ENGINE STOP AND START ECU

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


NG

4.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - EFI-MAIN NO. 1 RELAY)
4.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - EFI-MAIN NO. 1 RELAY)
a.

Disconnect the engine stop and start ECU connector.


b.

Remove the EFI-MAIN No. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A34-1 (+B) - 5 (EFI-MAIN NO. 1 relay) Always Below 1 Ω
A34-1 (+B) or 5 (EFI-MAIN NO. 1 relay) - Body ground and other terminals Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

5.INSPECT EFI-MAIN NO. 1 RELAY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - IGP RELAY)
a.

Disconnect the engine stop and start ECU connector.


b.

Remove the IGP relay from No. 1 engine room relay block and No. 1junction block.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A32-18 (IGP) - IGP relay terminal 3 Always Below 1 Ω
A32-18 (IGP) or IGP relay terminal 3 - Body ground and other terminals Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

7.CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (POWER SOURCE)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (POWER SOURCE)
A375649C22
0.615,1.146 0.948,1.396 0.333,0.25 0.271,0.125 0.583,0.323 0.313,0.198 10 false *a 0.688,1.177 1,1.375 0.313,0.198 10 false 4L
*a Front view of wire harness connector
(to Instrument Panel Junction Block Assembly)


a.

Disconnect the instrument panel junction block assembly connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
4L-1 - Body ground Always 11 to 14 V



Result:
Proceed to
OK
NG



OK

8.INSPECT IGP RELAY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

8.INSPECT IGP RELAY

Click hereEngine / Hybrid System>M20C-FKS (ENGINE CONTROL)>RELAY>ON-VEHICLE INSPECTION

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>RELAY>ON-VEHICLE INSPECTION

Result:
Result Proceed to
OK (w/ Smart Entry and Start System) A
OK (w/o Smart Entry and Start System) B
NG C



A

9.CHECK HARNESS AND CONNECTOR (IGP RELAY - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

B

10.CHECK HARNESS AND CONNECTOR (IGP RELAY - IGNITION OR STARTER SWITCH ASSEMBLY)

C

REPLACE IGP RELAY

9.CHECK HARNESS AND CONNECTOR (IGP RELAY - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))
a.

Remove the IGP relay from No. 1 engine room relay block and No. 1junction block.


b.

Disconnect the certification ECU (smart key ECU assembly) connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
IGP relay terminal 1 - G170-24 (IGPD) Always Below 1 Ω
IGP relay terminal 1 or G170-24 (IGPD) - Body ground and other terminals Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

GO TO SMART ENTRY AND START SYSTEM

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM (for Start Function, Gasoline Model)>Power Source Mode does not Change to ON (IG)


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.CHECK HARNESS AND CONNECTOR (IGP RELAY - IGNITION OR STARTER SWITCH ASSEMBLY)
a.

Remove the IGP relay from No. 1 engine room relay block and No. 1 junction block.


b.

Disconnect the ignition or starter switch assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
IGP relay terminal 1 - G28-8 (IG1) Always Below 1 Ω
IGP relay terminal 1 or G28-8 (IG1) - Body ground and other terminals Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

11.INSPECT IGNITION OR STARTER SWITCH ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

11.INSPECT IGNITION OR STARTER SWITCH ASSEMBLY
a.

Inspect the ignition or starter switch assembly.

·

for M20C-FKS:

Click hereEngine / Hybrid System>M20C-FKS (STARTING)>IGNITION SWITCH>INSPECTION

·

for M20D-FKS:

Click hereEngine / Hybrid System>M20D-FKS (STARTING)>IGNITION SWITCH>INSPECTION



Result:
Proceed to
OK
NG



OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - IGNITION OR STARTER SWITCH ASSEMBLY)

NG

REPLACE IGNITION OR STARTER SWITCH ASSEMBLY
·

for M20C-FKS:

Click hereEngine / Hybrid System>M20C-FKS (STARTING)>IGNITION SWITCH>REMOVAL

·

for M20D-FKS:

Click hereEngine / Hybrid System>M20D-FKS (STARTING)>IGNITION SWITCH>REMOVAL