Page 309 - Foton Workshop Manual - Tunland (AT)
P. 309
DIAGNOSTICS - ENGINE CONTROL SYSTEM 04-163
P175，P176，P177,P3539,P3541-ELECTRONIC THROTTLE
CONTROL ACTUATOR FAULT
P175-ELECTRONIC THROTTLE CONTROL ACTUATOR DRIVE
CIRCUIT - VOLTAGE IS ABOVE NORMAL OR SHORTED TO HIGH
VOLTAGE POWER SUPPLY 04
P176-ELECTRONIC THROTTLE CONTROL ACTUATOR CIRCUIT
- VOLTAGE IS ABOVE NORMAL OR SHORTED TO HIGH
VOLTAGE POWER SUPPLY
P177-INTAKE MANIFOLD 1 PRESSURE - THE DATA IS
UNSTABLE, INTERMITTENT OR INCORRECT
P3539 - ENGINE INTAKE AIR THROTTLE ACTUATOR POSITION
SENSOR CIRCUIT -VOLTAGE IS ABOVE NORMAL OR SHORTED
TO HIGH VOLTAGE POWER SUPPLY
P3541 - ENGINE INTAKE AIR THROTTLE ACTUATOR POSITION
SENSOR CIRCUIT -VOLTAGE IS BELOW NORMAL OR SHORTED
TO LOW VOLTAGE POWER SUPPLY
Description
1 . The engine control module (ECM) controls the intake air throttle actuator to turn
on and off according to different operating conditions.The engine intake throttle
actuator is switched on and off by a DC motor which receive the voltage from
the ECM through the engine intake throttle actuator motor signal (+) and (-)
circuit.The motor opens the actuator when receiving the voltage from the engine
intake throttle actuator motor signal (+) circuit.The motor closes the valve when
receiving the voltage from the EGR valve motor signal (+) circuit.
Circuit Diagram
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