Toyota Sienna Service Manual: Components

Throttle body

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On-vehicle inspection

1. INSPECT THROTTLE BODY  Listen to the throttle control motor operating sounds.  Turn the ignition switch to the ON position. When pressing the accelerator pedal position sens ...

Other materials:

Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter
DESCRIPTION This circuit is necessary for the ASL (Auto Sound Leveliser) built into the radio receiver. Speed signals are received from the combination meter and used for the ASL. The ASL function automatically adjusts the sound data in order to enable hearing the clear audio sound even ...

Catalyst System Efficiency Below Threshold
DTC P0420 Catalyst System Efficiency Below Threshold (Bank 1) DTC P0430 Catalyst System Efficiency Below Threshold (Bank 2) MONITOR DESCRIPTION The ECM uses the sensors mounted in front of and behind the three-way catalyst (TWC) to monitor its efficiency. The first sensor, an Air Fuel ratio ...

Air Mix Damper Position Sensor Circuit (Driver Side)
DESCRIPTION This sensor detects the position of the air mix control servo motor (air outlet damper) and sends the appropriate signals to the A/C amplifier. The position sensor is built in the air mix control servo motor. The position sensor resistance changes as the air mix control servo ...