Page 86 - Foton Workshop Manual - Auman EST-M

DI - 32 Diagnosis - Diagnosis-fault diagnosis of electronic and electrical parts

DTC code DTC definition DTC check condition Failed part
● Air solenoid valve
Injection unit air solenoid ● Circuit of solenoid valve
1697 Ignition switch at ON
valve short to ground short to ground
● Engine ECM
● Air solenoid valve
Injection unit solenoid valve ● Solenoid valve short to
1698 Ignition switch at ON
short to power supply or open power source
● Engine ECM
● Urea level sensor
● Signal circuit of urea level
1699 Urea level sensor failure Ignition switch at ON
sensor
● Engine ECM
● Engine ECM
Injection unit message
1711 Ignition switch at ON ● CAN bus system
timeout
● CAN terminal resistance
● Fuel moisture sensor
The data of fuel moisture
● Fuel
indicator is valid but higher
1852 When engine running ● Fuel pipe
than the normal working
● Fuel filter
range (medium severity)
● Engine ECM
● EGR pressure difference
sensor
The variable pressure data ● Poor contact of EGR
of waste gas recirculation pressure difference sensor
1866 When engine running
valve is not stable, terminal connector
intermittent or incorrect ● Fault of EGR pressure
difference connecting harness
● Engine ECM
The pressure difference
sensor circuit voltage of ● Pressure difference sensor
post-treatment diesel oil ● Circuit of pressure
1879 particulate filter is higher Ignition switch at ON difference sensor short to
than the normal value or power source
short to the high voltage ● Engine ECM
power supply
● Pressure difference sensor
The pressure difference
● Circuit of pressure
sensor voltage of
difference sensor short to
post-treatment diesel oil
1881 Ignition switch at ON ground
particulate filter is lower than
● Poor contact of pressure
the normal value or short to
difference sensor connector
the low voltage power supply
● Engine ECM
Outlet NO x sensor internal
1887 Ignition switch at ON ● Urea level sensor
failure

DI-032