Es

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

GO TO STEP 17

CHECK ECM POWER SOURCE CIRCUIT

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CONDUCT CIRCUIT INSPECTION

Result

Proceed to

Malfunction not confirmed

A

Malfunction confirmed

GO TO STEP 18

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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