POWER STEERING SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

VEHICLE BROUGHT TO WORKSHOP

NEXT

CUSTOMER PROBLEM ANALYSIS

1. Confirm problem symptoms Click here.

   
   

   NEXT

INSPECT AUXILIARY BATTERY VOLTAGE

1. Measure the voltage of the auxiliary battery.

   Standard Voltage
   11 to 14 V

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

2. Using the intelligent tester, inspect auxiliary battery voltage reduction history "Batt Vo Low" in the Data List Click here.

   
   

   NEXT

CHECK DTC AND FREEZE FRAME DATA*

1. Record DTCs and freeze frame data.

   
   

   NEXT

CLEAR DTC AND FREEZE FRAME DATA*

1. Clear the DTCs and freeze frame data.

   
   

   NEXT

PROBLEM SYMPTOM CONFIRMATION

B

Go to step 8

A

SYMPTOM SIMULATION

NEXT

CHECK CAN COMMUNICATION SYSTEM*

1. Check for DTCs Click here.

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

   Tech Tips

   
   

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

   • If communication to the power steering ECU cannot be established through the intelligent tester, 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 Click here

   A

CHECK FOR DTC*

1. Check for DTCs Click here.

   Tech Tips

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

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

   
   

   B

   Go to step 11

   A

PROBLEM SYMPTOMS TABLE

1. Refer to Problem Symptoms Table Click here.

   
   

   NEXT

CIRCUIT INSPECTION

NEXT

IDENTIFICATION OF PROBLEM

NEXT

REPAIR OR REPLACE

NEXT

CONFIRMATION TEST

NEXT