Page 78 - Foton Workshop Manual - Auman EST-M

DI - 24 Diagnosis - Diagnosis-fault diagnosis of electronic and electrical parts

DTC code DTC definition DTC check condition Failed part
The temperature data of inlet ● Intake manifold pressure
manifold 1 are valid and sensor
155 outside its normal operating Ignition switch at ON ● EGR valve or its control
range “the highest severity circuit
level”. ● Engine ECM
The voltage of electronic ● Electric accelerator sensor
throttle control actuator ● Electric accelerator sensor
175 driving circuit is higher than Ignition switch at ON circuit and power supply
its normal value or short to short
high-voltage power source. ● Engine ECM
The voltage of electronic ● Electric accelerator sensor
throttle control actuator ● Electric accelerator sensor
176 driving circuit is lower than Ignition switch at ON circuit and power supply
its normal value or short to short
high-voltage power source. ● Engine ECM
● Electronic throttle pedal
The mechanical system of assembly
electronic throttle control ● Electric accelerator sensor
177 Ignition switch at ON
actuator has no response or is circuit and power supply
outside its adjustment range. short
● Engine ECM
● Atmospheric pressure
The voltage of atmospheric
sensor
pressure sensor is higher than
● Short circuit of
221 the normal value or short to Ignition switch at ON
atmospheric pressure sensor
the high voltage power
circuit and power source
supply
● Engine ECM
● Atmospheric pressure
The voltage of atmospheric sensor
pressure sensor is lower than ● Sensor connector in poor
222 the normal value or short to Ignition switch at ON contact
the lower voltage power ● Atmospheric pressure
supply sensor circuit short to ground
● Engine ECM
● Crankshaft position sensor
The data of engine crankshaft ● Target wheel of crankshaft
speed/position is valid but position sensor
234 higher than the When engine running ● Entry of external fuel into
normal working range air inlet
(maximum severity) ● Inversion (idling) of engine
● Engine ECM
● Crankshaft position sensor
The voltage of crankshaft
● Sensor connector in poor
position sensor power supply
Ignition switch at ON and the contact
238 3 circuit is lower than the
engine is running ● Sensor circuit short to
normal value and short to the
ground
low voltage power supply
● Engine ECM

DI-024