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Toyota Sienna Service Manual: How to troubleshoot ecu controlled systems

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

Vehicle lift and support locations
1. NOTICE ABOUT VEHICLE CONDITION WHEN JACKING UP VEHICLE (a) The vehicle must be unloaded before jacking up/ lifting up the vehicle. Never jack up/lift up a heavily loaded vehicle. (b) When re ...

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

Other materials:

Freeze frame data
1. DESCRIPTION (a) The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the a ...

Stowing the spare tire
Lay down the tire with the outer side (valve stem) facing up, and install the holding bracket. Turn the jack handle clockwise to raise the tire until the tire is in the correct position as the jack handle skips. Stow the tools. The compact spare tire The compact s ...

Terminals of ECU
1. CHECK INSTRUMENT PANEL J/B ASSEMBLY (MULTIPLEX NETWORK BODY ECU)  Disconnect the B6, B7 and B9 ECU connectors. Disconnect the 1A, 1C, 1L and 1K J/B connectors.  Measure the voltage and resistance between each terminal of the wire harness side connectors and body gro ...

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