How To Proceed With Troubleshooting

HINT:

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

1. VEHICLE BROUGHT TO WORKSHOP 
2. INSPECT BATTERY VOLTAGE 

   Standard voltage: 11 to 14 V 

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

3. CHECK DTC AND FREEZE FRAME DATA* 
4. PROBLEM SYMPTOM CONFIRMATION 
5. CHECK CAN COMMUNICATION SYSTEM* 
   1. Check for DTCs (See DIAGNOSIS SYSTEM ).

      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.
      • 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 (See DTC CHECK / CLEAR  ).

      Result 

      RESULT REFERENCE
      
      

      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 REFERENCE
   
   

   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 (See TERMINALS OF ECU  ).
   2. Data List / Active Test (See DATA LIST / ACTIVE TEST  ).
9. REPAIR OR REPLACE 
10. CONFIRMATION TEST* 

    NEXT : END