Page 87 - Foton Workshop Manual - Auman EST-M

Diagnosis - Diagnosis-fault diagnosis of electronic and electrical parts DI - 33

DTC code DTC definition DTC check condition Failed part IN
● EGR valve
The EGR valve controller The ignition switch is first ● Fault of exhaust after
1896 DI
exceeds the rated value “ON” treatment system

● Engine ECM
● Fuel suction pipe EG
The metering oil rail pressure
● Vertical tube in suction side
data of Injector 1 is valid but
fuel filter assembly or fuel
1911 higher than the When engine running TR
tank
normal working range
● Oil rail pressure sensor
(highest severity level)
● Engine ECM AX
The data of post-treatment
● Post-treatment diesel oil
diesel oil particulate filter is
particulate filter FR
1981 valid but higher than the When engine running
● Fault or wrong connection
normal working range
of relevant harness
(minimum severity) ST
● Post-treatment diesel oil

Engine running or exhaust particulate filter
Post-treatment diesel oil BR
1993 flow higher than the lowest ● Fault of after-treatment
particulate filter missed
value diesel particle filter pressure
difference pipe BW
The voltage of engine ECM ●There is a short in the

sensor power supply 4 is circuit of the engine ECM
EL
2185 higher than the normal value Ignition switch at ON sensor power supply 4 or to
or short to the low voltage the power supply.
power supply ● Engine ECM

●There is a short of the

The voltage of sensor power engine ECM sensor power

supply 4 is lower than normal supply 4 to the ground
2186 Ignition switch at ON
value or short to the low ● Sensor connector in poor
voltage power supply contact

● Engine ECM

● Engine ECM
Outlet NOx sensor message Ignition switch at ON and the
2271 ● Urea level sensor
timeout engine is running
● CAN bus system
NOx emission exceeding Ignition switch at ON and the
2272 ● Urea level sensor
OBD limit 1 engine is running

NO x emission exceeding
2273 Ignition switch at ON ● Urea level sensor
OBD limit 2
● EGR valve pressure
variable sensor
The voltage of waste gas
● Circuit of EGR valve
recirculation valve pressure
pressure variable sensor short
2274 variable sensor is lower than Ignition switch at ON
to ground
the normal value or short to
● Sensor connector in poor
the low voltage power supply
contact

● Engine ECM

DI-033