How to Proceed With Troubleshooting

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

HINT
* Use the following procedure to troubleshoot the power steering system.
* *: Use the 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 Reading and Clearing Diagnostic Trouble Codes.

Result:





HINT
* If any CAN communication system DTCs are output, perform troubleshooting on the CAN communication system first.
* If communication to the power steering ECU cannot be established through the 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 FOR 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