Toyota Yaris: Stop And Start System / How To Proceed With Troubleshooting

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Engine & Hybrid System / Stop And Start / Stop And Start System / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

*: Use the GTS.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

CUSTOMER PROBLEM ANALYSIS

NEXT

3.

PRE-CHECK

(a) 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:

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

      Click here

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

      Click here

  • 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.

(b) Check the fuses and relays.

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

NEXT

4.

CHECK DTC AND FREEZE FRAME DATA*

(a) Check for DTCs.

Powertrain > Stop and Start > Trouble Codes

(b) Check for freeze frame data.

HINT:

Record or print DTCs and freeze frame data if necessary.

(c) Clear the DTCs and freeze frame data.

Powertrain > Stop and Start > Clear DTCs

(d) Recheck for DTCs.

Powertrain > Stop and Start > Trouble Codes

HINT:

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

Result

Proceed to

DTCs are not output

A

DTCs are output

B

Malfunction cannot be duplicated and DTCs are not output

C

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

C

USE SIMULATION METHOD TO CHECK

A

5.

REFER TO PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here

Result

Proceed to

Fault is not listed in problem symptoms table

A

Fault is listed in problem symptoms table

B

B

GO TO STEP 7

A

6.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Data List / Active Test

Click here

(b) Terminals of ECU

Click here

NEXT

7.

REPAIR OR REPLACE

NEXT

8.

CONFIRMATION TEST

(a) Warm up the engine.

(b) Turn the air conditioning system off.

(c) Drive the vehicle for 5 to 40 minutes.

CAUTION:

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

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

  • Steering wheel centered
  • Shift lever to neutral and release the clutch pedal
  • Stop and start indicator illuminated

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.

(e) Depress the clutch pedal and check that the engine restarts.

NEXT

END

    System Description

    SYSTEM DESCRIPTION STOP AND START CONTROL The stop and start system operates according to the following conditions, achieving appropriate engine stop and start control together with safe and smooth driving characteristics...

    Operation Check

    OPERATION CHECK STOP AND START SYSTEM OPERATION CHECK HINT: If the cable is disconnected from the battery terminal, stop and start control is prohibited until refresh charge is completed...

    Other information:

    Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: Utility


    U..

    Toyota Yaris XP210 (2020-2024) Owner's Manual: Bright-Metal Maintenance


    Use tar remover to remove road tar and insects. Never do this with a knife or similar tool. To prevent corrosion on bright-metal surfaces, apply wax or chrome preservative and rub it to a high luster. During cold weather or in coastal areas, cover bright-metal parts with a coating of wax or preservative heavier than usual...

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