How to Proceed With Troubleshooting

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

HINT
*: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP

NEXT -- Continue to next step.

2. CUSTOMER PROBLEM ANALYSIS

(a) Confirm problem symptoms How To Proceed With Troubleshooting.

NEXT -- Continue to next step.

3. INSPECT BATTERY VOLTAGE*

(a) Measure the voltage of the battery.

Standard voltage:

11 to 14 V

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

NEXT -- Continue to next step.

4. CHECK DTC*

(a) Check and record DTCs.

NEXT -- Continue to next step.

5. CLEAR DTC*

(a) Clear the DTCs.

NEXT -- Continue to next step.

6. PROBLEM SYMPTOM CONFIRMATION





B -- Go to step 8
A -- Continue to next step.

7. SYMPTOM SIMULATION

(a) Perform symptom simulation How To Proceed With Troubleshooting.

NEXT -- Continue to next step.

8. CHECK CAN COMMUNICATION SYSTEM*

(a) Check for DTCs Diagnosis System.





HINT
* If any CAN communication system DTCs are output, perform troubleshooting for the CAN communication system first How to Proceed With Troubleshooting.
* If communication with the power steering ECU cannot be established through the Techstream, inspect terminals CANH and CANL of the DLC3 and power steering ECU, and the IG circuit of the power steering ECU.
B -- PROCEED TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)
A -- Continue to next step.

9. CHECK FOR DTC*

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

HINT
Refer to Diagnostic Trouble Code Chart when any DTCs are output Power Steering System.





B -- Go to step 11
A -- Continue to next step.

10. PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table Power Steering System.

NEXT -- Continue to next step.

11. CIRCUIT INSPECTION

NEXT -- Continue to next step.

12. IDENTIFICATION OF PROBLEM

NEXT -- Continue to next step.

13. REPAIR OR REPLACE

NEXT -- Continue to next step.

14. CONFIRMATION TEST

NEXT -- END