How To Proceed With Troubleshooting

HINT:

• Use these procedures to troubleshoot the Electronic Power Steering System (EPS).
• *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT 

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 

3. CHECK DTC AND FREEZE FRAME DATA* 
   1. Record DTCs (see DTC CHECK / CLEAR ) and (see FREEZE FRAME DATA ).

   NEXT 

4. PROBLEM SYMPTOM CONFIRMATION 

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   Symptom does not occur	A
   Symptom occurs	B

   B : Go to step   6 

   A : Go to next step 

5. SYMPTOM SIMULATION 

   NEXT 

6. CHECK CAN COMMUNICATION SYSTEM* 
   1. Check for DTCs.

      Result 

      RESULT REFERENCE
      
      

      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 (see HOW TO PROCEED WITH TROUBLESHOOTING ).
      • When communication to the power steering ECU is not established through the Techstream, inspect terminals SIL of the DLC3 and power steering ECU and inspect the IG circuit of the power steering ECU.

   B : PROCEED TO CAN COMMUNICATION SYSTEM 

   A : Go to next step 

7. CHECK DTC* 
   1. Check for a DTCs.

      Result 

      RESULT REFERENCE
      
      

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

   B : Go to step   11 

   A : Go to next step 

8. PROBLEM SYMPTOMS TABLE  

   NEXT 

9. CIRCUIT INSPECTION 

   NEXT 

10. IDENTIFICATION OF PROBLEM 

    NEXT 

11. REPAIR OR REPLACE 

    NEXT 

12. CONFIRMATION TEST 

    NEXT: END