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 MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONREADING AND CLEARING DIAGNOSTIC TROUBLE CODESCLEARING TROUBLE CODES
2002 Toyota Highlander 4WD L4-2.4L (2AZ-FE)
Clearing Trouble Codes
2002 Toyota Highlander 4WD L4-2.4L (2AZ-FE)SECTION Clearing Trouble Codes
NOTE: This is the only information provided by the manufacturer for clearing diagnostic trouble codes for this system.
Clear the DTC.
The DTC and freeze frame data will be erased by either action.
1. Operating the OBDII scan tool (complying with SAE J1978) or TOYOTA hand-held tester to erase the codes (For operating instructions, see the OBDII scan tool's instruction book).
2. Disconnecting the battery terminals or EFI1 fuse.
NOTE: If the TOYOTA hand-held tester switches the ECM from the normal mode to the check mode or vise-versa, or if the ignition switch is turned from ON to ACC or OFF during the check mode, the DTCs and freeze frame data will be erased.
Clear the DTC.
The DTC and freeze frame data will be erased by either action.
1. Operating the OBDII scan tool (complying with SAE J1978) or TOYOTA hand-held tester to erase the codes (For operating instructions, see the OBDII scan tool's instruction book).
2. Disconnecting the battery terminals or EFI1 fuse.
NOTE: If the TOYOTA hand-held tester switches the ECM from the normal mode to the check mode or vise-versa, or if the ignition switch is turned from ON to ACC or OFF during the check mode, the DTCs and freeze frame data will be erased.
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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.