POWER STEERING SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

CAUTION / NOTICE / HINT

PROCEDURE

1. Click here

   VEHICLE BROUGHT TO WORKSHOP

   Result
   Proceed to NEXT

   
   
   • NEXTClick here
2. Click here

   INSPECT BATTERY VOLTAGE

   
   

   1. Measure the voltage of the battery.

      Standard Voltage
      11 to 14 V

      Tip:

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

   2. Using the GTS, inspect battery voltage reduction history "Battery Control Count (Body ECU)" in the Data List.

      Click here

      Result
      Proceed to NEXT

   
   
   • NEXTClick here
3. Click here

   CHECK DTC AND FREEZE FRAME DATA*

   Tip:

   Refer to DTC Check / Clear.

   Click here

   
   
   1. Chassis > EMPS > Trouble Codes
   2. 
      
   3. 
      

   Result
   Proceed to NEXT

   
   
   • NEXTClick here
4. Click here

   PROBLEM SYMPTOM CONFIRMATION

   Result
   Result Proceed to Symptom does not occur. A Symptom occurs. B

   
   
   • AClick here
   • BClick here

     GO TO STEP 6

5. Click here

   SYMPTOM SIMULATION

   Result
   Proceed to NEXT

   
   
   • NEXTClick here
6. Click here

   CHECK CAN COMMUNICATION SYSTEM*

   
   

   1. Check for DTCs.

      Click here

      Result
      Result Proceed to CAN communication system DTCs are not output. A CAN communication system DTCs are output. B

      Tip:
      

      • If any CAN communication system DTCs are output, perform troubleshooting for the CAN communication system first.

      • If communication to the power steering ECU assembly cannot be established through the GTS, inspect terminals CANH and CANL of the DLC3 and the power steering ECU assembly, and the IG circuit of the power steering ECU assembly.

   
   
   • AClick here
   • B

     PROCEED TO CAN COMMUNICATION SYSTEMClick here

7. Click here

   CHECK FOR DTC*

   
   

   1. Check for DTCs.

      Click here

      
      
      1. Chassis > EMPS > Trouble Codes
      2. 
         
      3. 
         
      Tip:

      Refer to Diagnostic Trouble Code Chart when any DTCs are output.

      Click here

      Result
      Result Proceed to DTCs are not output. A DTCs are output. B

   
   
   • AClick here
   • BClick here

     GO TO STEP 10

8. Click here

   PROBLEM SYMPTOMS TABLE

   
   

   1. Refer to Problem Symptoms Table.

      Click here

      Result
      Result Proceed to Fault is not listed in Problem Symptoms Table. A Fault is listed in Problem Symptoms Table. B

   
   
   • AClick here
   • BClick here

     GO TO STEP 10

9. Click here

   OVERALL ANALYSIS AND TROUBLESHOOTING*

   
   

   1. Refer to Terminals of ECU.

      Click here

   2. Refer to Data List / Active Test.

      Click here

      Result
      Proceed to NEXT

   
   
   • NEXTClick here
10. Click here

    REPAIR OR REPLACE

    Result
    Proceed to NEXT

    
    
    • NEXTClick here
11. Click here

    CONFIRMATION TEST

    Result
    Proceed to NEXT

    
    
    • NEXT

      END