How To Proceed With Troubleshooting

HINT: 

• Use these procedures to troubleshoot the power steering system.
• *: Use a 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 DIAGNOSIS SYSTEM .

      Result

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

      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: Go to next step 

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

      Result

      Result	Proceed to
      DTC output	A
      DTC 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