Toyota Sienna Service Manual: 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:

Using the voice command system
Press the talk switch. Select to train voice recognition. Select to start the voice recognition tutorial. Select “OK” and say the desired command. On the list screen, you can select the desired command. To cancel the voice command system, press and hold the talk sw ...

Passenger Airbag ON/OFF Indicator Circuit Malfunction
DTC B1152/28 Passenger Airbag ON/OFF Indicator Circuit Malfunction DESCRIPTION The passenger airbag ON/OFF indicator circuit consists of the center airbag sensor assembly and passenger airbag ON/OFF indicator. This circuit indicates the operation condition of the front passenger airbag, t ...

Installation
1. INSTALL BRAKE VACUUM CHECK VALVE ASSEMBLY (a) Install the brake vacuum check valve assembly and check valve grommet to the brake booster assembly. 2. INSTALL BRAKE BOOSTER GASKET (a) Install a new brake booster gasket to the brake booster with master cylinder. 3. INSTALL BRAKE MASTER CYLI ...