General Information

4WD Control

P0120 Throttle/Pedal Position Sensor/Switch 'A' Circuit - General Information

Component Location





General Description

TPS (or APS) signal which is used for judging driver's intention is received from engine ECU through CAN line.
This signal is a criteria signal to determined amount of torque distribution at front/rear wheel with steering angle sensor, wheel speed sensor, break signal.

DTC Description

If there is an error in signals related to TPS, the 4WD ECM sets this DTC.

DTC Detecting Condition





Diagnostic Circuit Diagram










Signal Waveform & Data




Fig.1) CAN Signal : high & low