Toyota Yaris: Power Steering System / How To Proceed With Troubleshooting

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Steering / Power Assist Systems / Power Steering System / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • Use the following procedure to troubleshoot the power steering system.
  • *: Use the GTS.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

INSPECT AUXILIARY BATTERY

(a) Turn the ignition switch off.

(b) Measure the voltage of the auxiliary battery.

Standard Voltage:

11 to 14 V

HINT:

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

NEXT

3.

CHECK DTC AND FREEZE FRAME DATA*

HINT:

Refer to DTC Check / Clear.

Click here

Chassis > EMPS > Trouble Codes
NEXT

4.

PROBLEM SYMPTOM CONFIRMATION

Result

Proceed to

Symptom does not occur.

A

Symptom occurs.

B

B

GO TO STEP 6

A

5.

SYMPTOM SIMULATION

NEXT

6.

CHECK CAN COMMUNICATION SYSTEM*

(a) Check for DTCs.

Click here

Result

Proceed to

CAN communication system DTCs are not output.

A

CAN communication system DTCs are output.

B

HINT:

  • If any CAN communication system DTCs are output, perform troubleshooting for the CAN communication system first.
  • If communication to the power steering ECU assembly cannot be established through the GTS, inspect terminals CANH and CANL of the DLC3 and the power steering ECU assembly, and the IG circuit of the power steering ECU assembly.
B

PROCEED TO CAN COMMUNICATION SYSTEM

A

7.

CHECK FOR DTC*

(a) Check for DTCs.

Click here

Chassis > EMPS > Trouble Codes

HINT:

Refer to Diagnostic Trouble Code Chart when any DTCs are output.

Click here

Result

Proceed to

DTCs are not output.

A

DTCs are output.

B

B

GO TO STEP 10

A

8.

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 10

A

9.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Refer to Terminals of ECU.

Click here

(b) Refer to Data List / Active Test.

Click here

NEXT

10.

REPAIR OR REPLACE

NEXT

11.

CONFIRMATION TEST

NEXT

END

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