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

Measure the battery voltage.

Standard voltage:

11 to 14 V (ignition switch off)

HINT:

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If the battery voltage is below 11 V, recharge or replace the battery. Until charging current decreases to 5 A or less, if integrated current value still does not increase to threshold value*1 or higher, initialize integrated current value*2.

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*1: Refer to Description of Integrated Current Value Threshold

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>SYSTEM DESCRIPTION201902,201906,_51,_078825,_0382334,RM100000001GBQ4,201906,202405,_51,_078825,_0382334,RM100000001IKMC,202405,999999,_51,_078825,_0382334,RM100000002MFND,

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*2: Using the GTS, perform Integrated Current Value Initialization.

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When the battery is replaced, even if stop and start control operates immediately after replacement, stop and start control prohibition may temporarily continue due to charging capacity learning that occurs within several trips.

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

Refer to Problem Symptoms Table.

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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 TEST201902,201906,_51,_078825,_0382334,RM100000001GBQE,201906,999999,_51,_078825,_0382334,RM100000001IKMH,

Terminals of ECU

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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.

for Automatic Transmission:

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

for Manual Transmission:

Depress the clutch pedal and check that the engine restarts.