How To Proceed With Troubleshooting

The intelligent tester can be used at step 3, 4, 6, 7, 11, 14, and 17.

VEHICLE BROUGHT TO WORKSHOP

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CUSTOMER PROBLEM ANALYSIS

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HINT:

See page IN-36.

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. 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

CHECK MULTIPLEX COMMUNICATION SYSTEM

(a) Check for output DTCs. 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

DTC CHECK AND CLEAR

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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

DTC CHECK (OTHER THAN CAN AND MULTIPLEX COMMUNICATION SYSTEM DTC)

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NORMAL SYSTEM CODE: GO TO STEP 12

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TROUBLE CODE: GO TO STEP 13

12

PROBLEM SYMPTOMS TABLE

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DTC CHART

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CIRCUIT INSPECTION

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IDENTIFICATION OF PROBLEM

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REPAIR OR REPLACE

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CONFIRMATION TEST

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Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.

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