Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2002HIGHLANDER 4WD L4-2.4L (2AZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTTRANSMISSION CONTROL SYSTEMSTESTING AND INSPECTIONSYMPTOM RELATED DIAGNOSTIC PROCEDURES
2002 Toyota Highlander 4WD L4-2.4L (2AZ-FE)
Symptom Related Diagnostic Procedures
2002 Toyota Highlander 4WD L4-2.4L (2AZ-FE)SECTION Symptom Related Diagnostic Procedures
PROBLEM SYMPTOMS TABLE
HINT: If a normal code is displayed during the diagnostic trouble code check although the trouble still occurs, check the circuits for each symptom in the order given in the charts.
The Matrix Chart is divided into 3 chapters.
- If the instruction "Proceed to next circuit inspection shown on matrix chart" is given in the flow chart of each circuit, proceed to the circuit with the next highest number in the table to continue the check.
- If the trouble still occurs even though there are no abnormalities in any of the other circuits, check and replace the ECM.
1. Chapter 1: Electronic Circuit Matrix Chart
2. Chapter 2: On-Vehicle Repair
3. Chapter 3: Off-Vehicle Repair
HINT: If a normal code is displayed during the diagnostic trouble code check although the trouble still occurs, check the circuits for each symptom in the order given in the charts.
The Matrix Chart is divided into 3 chapters.
- If the instruction "Proceed to next circuit inspection shown on matrix chart" is given in the flow chart of each circuit, proceed to the circuit with the next highest number in the table to continue the check.
- If the trouble still occurs even though there are no abnormalities in any of the other circuits, check and replace the ECM.
Problem Symptoms Table:
1. Chapter 1: Electronic Circuit Matrix Chart
Problem Symptoms Table:
2. Chapter 2: On-Vehicle Repair
Problem Symptoms Table:
3. Chapter 3: Off-Vehicle Repair
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.