How To Proceed With Troubleshooting

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

HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
- Use these procedures to troubleshoot the Electronic Power Steering System (EPS).
- *: 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*
(a) Record DTCs Reading and Clearing Diagnostic Trouble Codes and freeze frame data Freeze Frame Data.
NEXT -- Continue to next step.

4. PROBLEM SYMPTOM CONFIRMATION

Result





B -- Go to step 6
A -- Continue to next step.

5. SYMPTOM SIMULATION
NEXT -- Continue to next step.

6. CHECK CAN COMMUNICATION SYSTEM*
(a) Check for DTCs.

Result





HINT:
- When any CAN communication system DTCs are output, perform troubleshooting on the CAN communication system first Symptom Related Diagnostic Procedures.
- When communication to the power steering ECU is not established through the Techstream, inspect terminals SIL of the DLC3 and power steering ECU and inspect the IG circuit of the power steering ECU.

B -- PROCEED TO CAN COMMUNICATION SYSTEM
A -- Continue to next step.

7. CHECK DTC*
(a) Check for a DTCs.

Result





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

8. PROBLEM SYMPTOMS TABLE
NEXT -- Continue to next step.

9. CIRCUIT INSPECTION
NEXT -- Continue to next step.

10. IDENTIFICATION OF PROBLEM
NEXT -- Continue to next step.

11. REPAIR OR REPLACE
NEXT -- Continue to next step.

12. CONFIRMATION TEST
NEXT -- END