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 ...

More about Toyota Highlander:

Inspection
1. INSPECT VENTILATION VALVE SUB-ASSY (a) Install a clean hose to the ventilation valve. (b) Check ventilation valve operation. Blow air into the cylinder head side, and check that air passes through easily. CAUTION: Do not suck air through the valve. Petroleum substances insi ...