How To Proceed With Troubleshooting

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

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 .
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