Toyota Highlander Service Manual: How to troubleshoot ecu controlled systems

Toyota Highlander Service Manual / Introduction / How to troubleshoot ecu controlled systems

General information
How to proceed with troubleshooting
Electronic circuit inspection procedure

Vehicle lift and support locations

1. NOTICE ABOUT VEHICLE CONDITION WHEN JACKING UP THE VEHICLE The vehicle must be unloaded before jacking up the vehicle. Never jack up/lift up a heavily loaded vehicle. When remo ...

General information

A large number of ECU controlled systems are used in the HIGHLANDER. In general, ECU controlled systems are considered to be very intricate, requiring a high level of technical knowledge to troub ...

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Inspection
1. INSPECT THERMOSTAT HINT: The thermostat is numbered with the valve opening temperature is stamped on the thermostat. (a) Immerse the thermostat in water and gradually heat the water. (b) Check the valve opening temperature. Valve opening temperature: 80 to 84 C (176 to 183 F) ...