ELECTRONICALLY CONTROLLED BRAKE SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

VEHICLE BROUGHT TO WORKSHOP

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CUSTOMER PROBLEM ANALYSIS

1. Interview the customer and confirm the problem (Click here).

   
   
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CHECK DTC AND FREEZE FRAME DATA*

1. Check and record DTCs and Freeze Frame Data.

2. Clear the DTCs and Freeze Frame Data (Click herefor DTC Check/Clear, andClick herefor Freeze Frame Data).

3. Reconfirm the DTCs.

   
   

   1. Reconfirm the DTCs based on the recorded DTCs and Freeze Frame Data (Click herefor DTC Check/Clear, andClick herefor Freeze Frame Data).

      Tip:
      

      • When DTCs indicating CAN communication system malfunctions are output, repair the CAN communication system before repairing each corresponding sensor (Click here).

      • If any of DTCs U0123/62, U0124/95, U0126/63, and U0293/59 is output together with a CAN communication DTC, first check the appropriate sensor for a momentary open circuit (Click here).

      • If the intelligent tester cannot communicate with the skid control ECU, inspect the CAN communication system (Click here).

      • If there is no response from the skid control ECU, inspect the IG1 circuit of the skid control ECU (Click here).

      Result
      Result Proceed to DTC is output A DTC is not output (Problem symptom does not occur) B DTC is not output (Problem symptom occurs) C

   
   
   • B
   • Go to step 5
   • C
   • Go to step 6
   • A

DIAGNOSTIC TROUBLE CODE CHART

1. Proceed to Diagnostic Trouble Code Chart (Click here).

   
   
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   • Go to step 7

SYMPTOM SIMULATION

1. Proceed to How to Proceed with Troubleshooting (Click here).

   
   
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PROBLEM SYMPTOMS TABLE

1. Proceed to Problem Symptoms Table (Click here).

   
   
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CIRCUIT INSPECTION*

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IDENTIFICATION OF PROBLEM

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REPAIR OR REPLACEMENT

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CONFIRMATION TEST*

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• END