Page 383 - Foton Workshop Manual - Tunland (AT)
P. 383
DIAGNOSTICS - ENGINE CONTROL SYSTEM 04-237
P1242，P2185，P2186-ACCELERATOR PEDAL OR LEVER
POSITION SENSOR 1 AND 2 - THE DATA IS UNSTABLE,
INTERMITTENT OR INCORRECT
P1242-ACCELERATOR PEDAL OR LEVER POSITION SENSOR 1
AND 2 - THE DATA IS UNSTABLE, INTERMITTENT OR 04
INCORRECT
P2185-SENSOR POWER 4 CIRCUIT - VOLTAGE IS ABOVE
NORMAL OR SHORTED TO HIGH VOLTAGE POWER SUPPLY
P2186-SENSOR POWER 4 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.
Circuit Diagram
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