Page 423 - Foton Workshop Manual - Tunland (AT)

DIAGNOSTICS - ENGINE CONTROL SYSTEM 04-277

DTC inspection
DTC DTC definition Trouble location
conditions
• Differential
pressure sensor
Postprecessing diesel
• The circuit in
particulate filter
harness, connector 04
differential pressure
or sensor circuit is
sensor circuit -
P1879 open.
voltage is above • The signal circuit is
normal or shorted to
short to the sensor
high voltage power
power or battery
supply
voltage
• ECM

• Differential
Postprecessing diesel pressure sensor
particulate filter • The circuit in
differential pressure harness, connector
sensor circuit - or sensor circuit is
P1881
voltage is below open.
normal or shorted to • Power line is open
low voltage power • When the key or shorted to
supply ground
switch is in ON
• ECM
position, the
diagnosis continues • Postprocessing
to run.
diesel particulate
Postprocessing diesel filter
particulate filter
• Differential
differential pressure - pressure sensor
P1921 data is valid but
and its harness
above normal
• Postprocessing
operating range -
temperature sensor
medium severity level
and its harness
• ECM

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

Page 423