How To Proceed With Troubleshooting

POWER STEERING: POWER STEERING SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

HINT
* Use these procedures to troubleshoot the power steering system.
* *: Use a Techstream.
1. VEHICLE BROUGHT TO WORKSHOP

NEXT -- Continue to next step.

2. INSPECT BATTERY VOLTAGE

Standard voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the battery before proceeding.

NEXT -- Continue to next step.

3. CHECK DTC AND FREEZE FRAME DATA*

NEXT -- Continue to next step.

4. PROBLEM SYMPTOM CONFIRMATION

NEXT -- Continue to next step.

5. CHECK CAN COMMUNICATION SYSTEM*

(a) Check for DTCs Diagnosis System.

Result:





HINT
* When any CAN communication system DTCs are output, perform troubleshooting on the CAN communication system first.
* When communication to the power steering ECU is not established through a Techstream, inspect terminals CANH and CANL of the DLC3 and the power steering ECU, and the IG circuit of the power steering ECU.
B -- PROCEED TO CAN COMMUNICATION SYSTEM
A -- Continue to next step.

6. CHECK DTC*

(a) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result:





A -- Go to step 9
B -- Continue to next step.

7. PROBLEM SYMPTOMS TABLE

Result:





B -- Go to step 9
A -- Continue to next step.

8. OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Terminals of ECU Pinout Values and Diagnostic Parameters.

(b) Data List / Active Test Data List / Active Test.

NEXT -- Continue to next step.

9. REPAIR OR REPLACE

NEXT -- Continue to next step.

10. CONFIRMATION TEST*

NEXT -- END