How To Proceed With Troubleshooting

HINT:

• Use these procedures to troubleshoot the power steering system.
• Use the 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 DTC CHECK / CLEAR  ).

      Result 

      RESULT CHART
      
      

      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 the intelligent tester or 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 CHART
      
      

      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 CHART
   
   

   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