Page 269 - Foton Workshop Manual - Tunland (AT)

DIAGNOSTICS - ENGINE CONTROL SYSTEM 04-123

Failure code Diagnostic items (DTC definition) Trouble location
• Differential pressure sensor
Postprocessing diesel particulate fil- • Open circuit in harness, connector
ter differential pressure sensor circuit or sensor circuit
P1879
voltage is higher than normal or short • The signal circuit is short to the
circuit to high voltage power supply sensor power or battery voltage 04
• ECM

• Differential pressure sensor
• The signal circuit in the engine
Postprocessing diesel particulate fil-
harness or sensor is open or
ter differential pressure sensor circuit
P1881 shorted to ground
voltage is lower than normal or short
• Power line is open or shorted to
circuit to low voltage power supply
ground
• ECM
• EGR valve controller
• EGR valve controller connector is
EGR (EGR) valve controller - beyond
P1896 out of contact, the harness is open
calibration
or shorted
• ECM

• Oil rail pressure sensor
• Fuel pump actuator
Fuel injector metering oil rail 1 pres-
• Oil rail pressure sensor or fuel
sure- data is valid but above normal
P1911 pump actuator connector is out of
operating range - highest severity
contact, the harness is open or
level
shorted
• ECM

• Postprocessing diesel particulate
Postprocessing diesel particulate fil-
filter
ter differential pressure - data is valid
P1921 • Differential pressure sensor and its
but above normal operating range -
harness
medium severity level
• ECM
• Postprocessing diesel particulate
filter
Postprocessing diesel particulate fil-
• Differential pressure sensor and its
ter differential pressure - data is valid
P1922 harness
but above normal operating range -
• Postprocessing temperature sensor
highest severity level
and its harness
• ECM

• Battery
ECU power output voltage 1 - data • Turbocharger actuator and its har-
P1938 is valid but below normal operating
ness
range - medium severity level
• ECM

Page 269