How To Proceed With Troubleshooting

HINT:

• Use these procedures to troubleshoot the power steering system.
• *: Use the Intelligent tester or Techstream.

1. VEHICLE BROUGHT TO WORKSHOP 
2. INSPECT AUXILIARY BATTERY VOLTAGE 

   Standard voltage: 

   11 to 14 V 

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

3. CHECK DTC AND FREEZE FRAME DATA* 
   1. Record DTCs and freeze frame data.
4. CLEAR DTC AND FREEZE FRAME DATA* 
5. PROBLEM SYMPTOM CONFIRMATION 

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   Symptom does not occur	A
   Symptom occurs	B

   B:  Go to step  7

   A: Go to next Step 

6. SYMPTOM SIMULATION 
7. CHECK DTC* 
   1. Check for DTCs (see DTC CHECK / CLEAR  ).
   2. Delete DTCs
   3. Recheck for DTCs

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      DTC does not reoccur	A
      DTC reoccurs	B

      HINT:

      • Refer to the DIAGNOSTIC TROUBLE CODE CHART  if any DTCs are output.
      • If any CAN communication system DTCs are output, perform troubleshooting on the CAN communication system first (see DIAGNOSIS SYSTEM ).
      • If communication to the power steering ECU is not established through the Intelligent tester or Techstream, inspect terminals CANH and CANL of the DLC3 and power steering ECU, and inspect the IG circuit of the power steering ECU.

   B:  Go to step  9

   A: Go to next Step 

8. PROBLEM SYMPTOMS TABLE 
9. CIRCUIT INSPECTION 
10. IDENTIFICATION OF PROBLEM 
11. REPAIR OR REPLACE 
12. CONFIRMATION TEST 

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