Page 88 - Foton Workshop Manual - Auman EST-M

DI - 34 Diagnosis - Diagnosis-fault diagnosis of electronic and electrical parts

DTC code DTC definition DTC check condition Failed part
● High pressure oil pump
● Electronic fuel injection
control valve
● Fuel pressure sensor
Electric fuel injection control
2311 When engine running ● Fuel rail pressure control
valve circuit failure
valve
● Relevant harness or
connector fault
● Engine ECM
● Crankshaft position sensor
● Crankshaft position sensor
Engine crankshaft position signal wheel
2321 sensor data unstable, When engine running ● Fault of crankshaft position
intermittent or not correct sensor connector or relevant
harness
● Engine ECM
● Camshaft position sensor
● Camshaft position sensor
The data of engine camshaft signal wheel
2322 position sensor is unstable, When engine running ● Fault of camshaft position
intermittent or incorrect sensor connector or relevant
harness
● Engine ECM
The voltage of engine ● Exhaust braking actuator
(exhaust) braking and driving ● Brake driving circuit short
2369 circuit is lower than the When engine running to ground
normal value or short to the ● Connector in poor contact
low voltage power supply ● Engine ECM
The voltage of engine
● Exhaust braking actuator
(exhaust) braking and driving
● Brake driving circuit short
2371 circuit is higher than the When engine running
to power source
normal value or short to the
● Engine ECM
high voltage power supply
● Air inlet heater
The voltage of air intake
● Circuit of #1 engine air
heater circuit of Engine 1 is Ignition switch is “ON” and
inlet heater short to power
2555 higher than the normal value pulse width modulator
source
or short to the high voltage (PWM) is started
● Intake heater relay
power supply
● Engine ECM
● Intake pre-heater
The voltage of engine intake ● Circuit of #1 engine air
Ignition switch at ON and
heater 1 circuit is lower than inlet heater short to ground
2556 start the pulse-width
the normal value or short to ● Intake heater relay
modulation (PWM) device
the low voltage power supply ● Connector in poor contact
● Engine ECM

DI-034