How To Proceed With Troubleshooting

HINT:

*: Use the intelligent tester.

VEHICLE BROUGHT TO WORKSHOP

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CUSTOMER PROBLEM ANALYSIS

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CONNECT INTELLIGENT TESTER TO DLC3*

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HINT:

If the display indicates a communication fault in the tester, inspect the DLC3.

CHECK DTC AND FREEZE FRAME DATA*

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HINT:

Record or print DTCs and freeze frame data, if necessary.

CLEAR DTC AND FREEZE FRAME DATA*

CONDUCT VISUAL INSPECTION

SET CHECK MODE DIAGNOSIS*

NEXT

CONFIRM PROBLEM SYMPTOMS

HINT:

If the engine does not start, first perform the "CHECK DTC" procedures and "CONDUCT BASIC INSPECTION" procedures below.

Result

Proceed to

Malfunction does not occur

A

Malfunction occurs

GO TO STEP 10

SIMULATE SYMPTOMS

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CHECK DTC*

Result

Proceed to

Malfunction code

A

No code

GO TO STEP 12

REFER TO DTC CHART

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GO TO STEP 14

CONDUCT BASIC INSPECTION

Result

Proceed to

Malfunctioning parts not confirmed

A

Malfunctioning parts confirmed

GO TO STEP 17

REFER TO PROBLEM SYMPTOMS TABLE

Result

Proceed to

Malfunctioning circuit confirmed

A

Malfunctioning parts confirmed

CHECK ECM POWER SOURCE CIRCUIT

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CONDUCT CIRCUIT INSPECTION

Result

Proceed to

Malfunction not confirmed

A

Malfunction confirmed

CHECK FOR INTERMITTENT PROBLEMS

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GO TO STEP 18

CONDUCT PARTS INSPECTION

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IDENTIFY PROBLEM

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ADJUST AND/OR REPAIR

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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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