How to Proceed With Troubleshooting

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for 2AZ-FE): HOW TO PROCEED WITH TROUBLESHOOTING

HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
- Use these procedures to troubleshoot the power steering system.
- *: 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*
HINT: Refer to Clear DTCs Reading and Clearing Diagnostic Trouble Codes.

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 How to Proceed With Troubleshooting.
Result:





HINT:
- If any CAN communication system DTCs 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
A -- Continue to next step.
7. 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 9
A -- Continue to next step.
8. PROBLEM SYMPTOMS TABLE
(a) Refer to Problem Symptoms Table Power Steering System.
Result:






B -- Go to step 9
A -- Continue to next step.
9. OVERALL ANALYSIS AND TROUBLESHOOTING*
(a) Refer to Terminals of ECU Pinout Values and Diagnostic Parameters.
(b) Refer to Data List / Active Test Data List / Active Test.
NEXT -- Continue to next step.
10. REPAIR OR REPLACE
NEXT -- Continue to next step.
11. CONFIRMATION TEST
NEXT -- END