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. CUSTOMER PROBLEM ANALYSIS

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

NEXT -- Continue to next step.

3. INSPECT AUXILIARY BATTERY VOLTAGE

(a) Measure the voltage of the auxiliary battery.

Standard Voltage:

11 to 14 V

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

(b) Using the Techstream, inspect auxiliary battery voltage reduction history "Batt Vo Low" in the Data List Data List / Active Test.

NEXT -- Continue to next step.

4. CHECK DTC AND FREEZE FRAME DATA*

(a) Record DTCs and freeze frame data.

NEXT -- Continue to next step.

5. CLEAR DTC AND FREEZE FRAME DATA*

(a) Clear the DTCs and freeze frame data.

NEXT -- Continue to next step.

6. PROBLEM SYMPTOM CONFIRMATION

Result:





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

7. SYMPTOM SIMULATION

NEXT -- Continue to next step.

8. CHECK CAN COMMUNICATION SYSTEM*

(a) Check for DTCs Diagnosis System.

Result:





HINT
* If any DTCs of the CAN communication system 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 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.

Result:





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

10. PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table Problem Symptoms Table.

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