Page 82 - Foton Workshop Manual - Auman EST-M

DI - 28 Diagnosis - Diagnosis-fault diagnosis of electronic and electrical parts

DTC code DTC definition DTC check condition Failed part
The voltage of injector
● Oil rail pressure sensor
metering oil rail pressure 1
● Sensor circuit short to
451 sensor is higher than the Ignition switch at ON
power source
normal value or short to the
● Engine ECM
high voltage power supply
● Oil rail pressure sensor
The voltage of injector
● Sensor circuit short to
metering oil rail pressure 1
ground
452 sensor is lower than the Ignition switch at ON
● Poor contact of fuel rail
normal value or short to the
pressure sensor connector
low voltage power supply
● Engine ECM
The metering oil rail pressure ● Pressure limiting valve
data of Injector 1 is valid but ● Metering control cell
553 higher than the When engine running ● Oil rail pressure sensor
normal working range ● High pressure oil pump
(moderate severity level) ● Engine ECM
● Pressure limiting valve
● Metering control cell
The injector metering oil rail ● Oil rail pressure sensor
554 1 pressure data is unstable, When engine running ● High pressure oil pump
intermittent or not correct ● Relevant connector in poor
contact or harness failure
● Engine ECM
● Pressure limiting valve
The metering oil rail pressure ● Metering control cell
data of Injector 1 is valid but ● Oil rail pressure sensor
559 lower than the When engine running ● High pressure oil pump
normal working range ● Relevant connector in poor
(moderate severity level) contact or harness failure
● Engine ECM
The voltage of starter motor
The ignition switch is ● Battery
relay drive circuit is higher
“ON”, and the pulse width ● Its driving circuit short to
584 than the normal value or
modulator is powered on or power source
short to the high voltage
off. ● Engine ECM
power supply
● Battery
The voltage of starter motor
Ignition switch at ON and ● Its driving circuit short to
relay drive circuit is lower
pulse-width modulation ground
585 than the normal value or
(PWM) device powered on ● Relevant connector in poor
short to the low voltage
or open contact or harness failure
power supply
● Engine ECM
The voltage data of electric
● Generator
charging system is valid but
● Pressure regulator
596 higher than the Ignition switch at ON
● Battery
normal working range
● Engine ECM
(medium severity)

DI-028