How To Proceed With Troubleshooting

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

HOW TO PROCEED WITH TROUBLESHOOTING

Perform troubleshooting according to the following flowchart.
HINT: The Techstream can be used in steps 3, 4, 7, 10 and 13.

1. VEHICLE BROUGHT TO WORKSHOP
NEXT -- Continue to next step.
2. CUSTOMER PROBLEM ANALYSIS
NEXT -- Continue to next step.
3. CHECK DTC AND FREEZE FRAME DATA
(a) Record DTCs and freeze frame data. Reading and Clearing Diagnostic Trouble Codes
NEXT -- Continue to next step.
4. CLEAR DTC AND FREEZE FRAME DATA
HINT: Clear DTC and FREEZE FRAME DATA Reading and Clearing Diagnostic Trouble Codes.

NEXT -- Continue to next step.
5. PROBLEM SYMPTOM CONFIRMATION
-- SYMPTOM DOES NOT OCCUR: GO TO STEP 6
-- SYMPTOM OCCURS: GO TO STEP 7
6. SYMPTOM SIMULATION
NEXT -- Continue to next step.
7. CHECK DTC
(a) Recheck for DTCs Reading and Clearing Diagnostic Trouble Codes.
HINT:
- Refer to the diagnostic trouble code chart when any DTCs are output.
- 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 the Techstream , inspect terminals SIL of the DLC3 and the power steering ECU, and the IG circuit of the power steering ECU.

-- NORMAL SYSTEM CODE OUTPUT: GO TO STEP 8
-- DTC OUTPUT: GO TO STEP 9
8. PROBLEM SYMPTOMS TABLE
HINT: Refer to PROBLEM SYMPTOMS TABLE Electronic Power Steering System.

NEXT -- Continue to next step.
9. DTC CHART
HINT: Refer to DIAGNOSTIC TROUBLE CODE CHART Electronic Power Steering System.

NEXT -- Continue to next step.
10. CIRCUIT INSPECTION
NEXT -- Continue to next step.
11. PROBLEM IDENTIFICATION
NEXT -- Continue to next step.
12. REPAIR OR REPLACE
NEXT -- Continue to next step.
13. CONFIRMATION TEST
NEXT -- END