Accelerator Pedal - Toyota RAV4 2009 Features Manual

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4) Fail-safe of Accelerator Pedal Position Sensor
D The accelerator pedal position sensor is comprised of two (main, sub) sensor circuits. If a malfunction
occurs in either one of the sensor circuits, the ECM detects the abnormal signal voltage difference
between these two sensor circuits and switches to the limp mode. In the limp mode, the remaining
circuit is used to calculate the accelerator pedal depressed angle, in order to operate the vehicle under
the limp mode control.

Accelerator Pedal

Position Sensor
Main
Accelerator Pedal
D If both circuits have malfunctions, the ECM detects the abnormal signal voltage from these two sensor
circuits and stops the throttle control. At this time, the vehicle can be driven within its idling range.
Accelerator Pedal
Position Sensor
Main
Accelerator Pedal
RAV4 – NEW FEATURES
ECM
Main
Sub
Sub
Throttle
Throttle Valve
Control
Motor
ECM
Close by
Return Spring
Sub
Main
Sub
Throttle
Throttle Valve
Position
Sensor
Open
Return
Spring
Throttle Body
Return
Spring
Throttle Body
Throttle
Position
Sensor
199EG45
Throttle
Control
Motor
199EG46