How To Proceed With Troubleshooting

BRAKE CONTROL: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

*: Use the Techstream.
1. VEHICLE BROUGHT TO WORKSHOP
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2. CUSTOMER PROBLEM ANALYSIS
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3. CHECK DTC AND FREEZE FRAME DATA*
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4. CLEAR DTC AND FREEZE FRAME DATA*
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5. PROBLEM SYMPTOM CONFIRMATION
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6. CHECK CAN COMMUNICATION SYSTEM*
(a) Check for output DTCs Diagnosis System.
HINT:
The ECU of this system is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN communication system.

-- CAN COMMUNICATION SYSTEM DTC IS OUTPUT: PROCEED TO CAN COMMUNICATION SYSTEM
-- NO CAN COMMUNICATION SYSTEM DTC IS OUTPUT: GO TO STEP 7
7. CHECK MULTIPLEX COMMUNICATION SYSTEM*
(a) Check for output DTCs Reading and Clearing Diagnostic Trouble Codes.
HINT:
The skid control ECU sends the signals of each warning light to the gateway ECU via CAN communication, and the gateway ECU sends the signals to the combination meter via the multiplex communication system (BEAN).

-- MULTIPLEX COMMUNICATION SYSTEM DTC IS OUTPUT: PROCEED TO MULTIPLEX COMMUNICATION SYSTEM
-- NO MULTIPLEX COMMUNICATION SYSTEM DTC IS OUTPUT: GO TO STEP 8
8. DTC CHECK AND CLEAR*
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9. PROBLEM SYMPTOM SIMULATION
-- SYMPTOM DOES NOT OCCUR: GO TO STEP 10
-- SYMPTOM OCCURS: GO TO STEP 11
10. SYMPTOM SIMULATION
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11. CHECK FOR DTC (OTHER THAN CAN AND MULTIPLEX COMMUNICATION SYSTEM DTC)*
(a) Check for output DTCs Electronically Controlled Brake System.
-- NORMAL SYSTEM CODE: GO TO STEP 12
-- TROUBLE CODE: GO TO STEP 13
12. PROBLEM SYMPTOMS TABLE
NEXT -- GO TO STEP 14
13. DTC CHART
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14. CIRCUIT INSPECTION*
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15. IDENTIFICATION OF PROBLEM
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16. REPAIR OR REPLACE
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17. CONFIRMATION TEST*
NEXT -- END