Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Sfi system / Throttle/pedal position sensor/switch ”a” circuit range/performance problem

Toyota Corolla (E120): Throttle/pedal position sensor/switch ”a” circuit range/performance problem

Dtc p0121 throttle/pedal position sensor/switch ”a” circuit range/performance problem

Hint

: this is the purpose of the ”throttle position sensor”.

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Inspection procedure
Hint: hand–held tester only: narrowing down the trouble area is possible by performing ”a/f control” active test (heated oxygen sensor or other trouble areas can be distinguished). Perform active test using hand–held tester (a/f control). Hint: ”a/f control” is the active te ...

Circuit description
When the idle switch is turned on, a signal is sent to the cruise control ecu assy. The cruise control ecu assy uses this signal to correct the discrepancy between the throttle valve position and the actuator position sensor values to enable accurate cruise control at the set speed. If the idl ...

Replacement
Hint: components: 1. Table of bolt, screw and nut Notice: be sure to tape the tip of the screwdriver when using it to disengage the meshing of the clips and claws. Hint: indicate the bolts, screws and nuts, which are necessary for installation and removal of the instrument panel, in th ...