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: Go 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: Go to next step 

3. CHECK DTC AND FREEZE FRAME DATA 

   NEXT: Go to next step 

4. PROBLEM SYMPTOM CONFIRMATION 

   NEXT: Go to next step 

5. CHECK CAN COMMUNICATION SYSTEM* 
   1. Check for DTCs. Refer to DTC CHECK / CLEAR .

      Result

      Result	Proceed to
      CAN system DTC is not output	A
      CAN system DTC is output	B

      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. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING 

      A: Go to next step 

6. CHECK FOR DTC* 
   1. Check for DTCs. Refer to DTC CHECK / CLEAR .

      Result

      Result	Proceed to
      DTC is output	A
      DTC is not output	B

      A → Go to step 9 

      B: Go to next step 

7. PROBLEM SYMPTOMS TABLE 

   Result

   Result	Proceed to
   Fault is not listed in problem symptoms table	A
   Fault is listed in problem symptoms table	B

   B → Go to step 9 

   A: Go to next step 

8. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. Terminals of ECU. Refer to TERMINALS OF ECU 
   2. Data List / Active Test. Refer to DATA LIST / ACTIVE TEST 

      NEXT: Go to next step 

9. REPAIR OR REPLACE 

   NEXT: Go to next step 

10. CONFIRMATION TEST 

    NEXT → END