Page 293 - Foton Workshop Manual - Tunland (AT)

DIAGNOSTICS - ENGINE CONTROL SYSTEM 04-147

P131，P132-ACCELERATOR PEDAL OR LEVER POSITION

SENSOR 1 FAULT
P131-ACCELERATOR PEDAL OR LEVER POSITION SENSOR 1

CIRCUIT - VOLTAGE IS ABOVE NORMAL OR SHORTED TO HIGH
VOLTAGE POWER SUPPLY. 04
P132-ACCELERATOR PEDAL OR LEVER POSITION SENSOR 1

CIRCUIT - VOLTAGE IS BELOW NORMAL OR SHORTED TO LOW
VOLTAGE POWER SUPPLY.

Description
1 . The throttle position sensor is a Holzer effect sensor and connected to the
accelerator pedal.When the accelerator pedal is lowered or released, the signal
voltage generated by the throttle position sensor to the engine control module
(ECM) will change. When the accelerator pedal is at 0%, the ECM will receive a
low signal voltage. When the accelerator pedal is at 100%, the ECM will receive
a high signal voltage.The accelerator pedal position circuit comprises an
accelerator pedal position 5V power supply circuit, an accelerator pedal position
loop circuit and an accelerator pedal position signal circuit.The accelerator
pedal has two position sensors which are used to measure the throttle position.
The two position sensors receive the 5V power supplied by the ECM and also
receive the corresponding signal voltage supplied by the ECM according to the
accelerator pedal position.The throttle position NO.1 signal voltage is two times
of the throttle position NO.2 signal voltage.The ECM detects that a signal voltage
is higher than the normal operating range of the sensor.This fault code is set
up.

Circuit Diagram

Page 293