STOP AND START  STOP AND START SYSTEM  HOW TO PROCEED WITH TROUBLESHOOTING  

Measure the auxiliary battery voltage.

Standard voltage:

11 to 14 V (ignition switch off)

If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.

HINT:

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If the auxiliary battery voltage is less than 11 V, recharge or replace the auxiliary battery. If the integrated current value does not exceed the threshold*1 even though the auxiliary battery has been replaced or charged until the charging current decreases to 5 A or less, perform an integrated current value initialization*2 and drive the vehicle for approximately 5 to 40 minutes until the stop and start system operates.

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*1: Refer to System Description for details on the integrated current threshold.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>SYSTEM DESCRIPTION202201,202307,_51,_115233,_0510781,RM1000000020B28,202307,202405,_51,_115233,_0510781,RM100000002CS0C,202405,999999,_51,_115233,_0510781,RM100000002MDKV,

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*2: Use the GTS to perform Integrated Current Value Initialization.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>REGISTRATION202201,999999,_51,_115233,_0510781,RM1000000020B1M,

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When replacing the auxiliary battery, even if the stop and start system operates directly after performing integrated current value initialization, operation of the stop and start system may be prohibited at certain times over the next few trips while auxiliary battery charge learning is performed.

Check the fuses and relays.

Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

Check for DTCs.

Powertrain > Stop and Start > Trouble Codes

50001 392

Check for Freeze Frame Data.

HINT:

Record or print DTCs and Freeze Frame Data if necessary.

Clear the DTCs and Freeze Frame Data.

Powertrain > Stop and Start > Clear DTCs

50002 392

Recheck for DTCs.

Powertrain > Stop and Start > Trouble Codes

50001 392

HINT:

If any DTCs for the CAN communication system are output, troubleshoot those DTCs first.

Result:

Result	Proceed to
DTCs are not output	A
DTCs are output	B

Check for Vehicle Control History (RoB) and Vehicle Control History Freeze Frame Data.

Powertrain > Stop and Start > Utility

Tester Display
Vehicle Control History (RoB)

50005 392 55

HINT:

Print Vehicle Control History (RoB) and Vehicle Control History Freeze Frame Data if necessary.

Refer to Problem Symptoms Table.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>PROBLEM SYMPTOMS TABLE202201,202307,_51,_115233,_0510781,RM1000000020B29,202307,999999,_51,_115233,_0510781,RM100000002CS66,

Result:

Result	Proceed to
Fault is not listed in problem symptoms table	A
Fault is listed in problem symptoms table	B

Data List / Active Test

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>DATA LIST / ACTIVE TEST202201,202307,_51,_115233,_0510781,RM1000000020B2Q,202307,999999,_51,_115233,_0510781,RM100000002O492,

Terminals of ECU

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>TERMINALS OF ECU202201,999999,_51,_115233,_0510781,RM1000000020B1N,

Warm up the engine.

Turn the air conditioning system off.

Drive the vehicle for 5 to 40 minutes.

CAUTION:

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

Stop the vehicle and confirm that the engine is stopped by stop and start control when all of the following conditions are met:

HINT:

If the engine is not stopped by stop and start control, air fuel ratio learning and idle speed learning are necessary. Allow the engine to idle for 3 minutes and check that the engine idle speed is within 50 rpm of the target idle speed.

Move the shift lever to N and confirm that the engine starts.