Page 715 - Workshop Manual - Tunland (2017)

DIAGNOSTICS - ENGINE CONTROL SYSTEM 04-29

04
Failure code Diagnostic items (DTC definition) Trouble location
• ECM

• Postprocessing diesel oxidation
Postprocessing diesel fuel oxidation catalyst
P1664
catalyst missing - Problem exist • Postprocessing fuel injector
• ECM and its harness

Postprocessing diesel fuel oxidation • Postprocessing diesel oxidation
catalyst system efficiency - data Valid catalyst
P1691
but below normal work range - medi- • Exhaust system
um severity level • ECM and its harness

• ECM power supply short circuit,
Sensor power 5 circuit - voltage is
sensor damage, short wiring har-
P1695 above normal or shorted to low volt-
ness
age power supply
• ECM

• ECM power supply short circuit,
Sensor power 5 circuit - voltage is
sensor damage, short wiring har-
P1696 below normal or shorted to low volt- ness
age power supply
• ECM

• Fuel hydrous sensor
Fuel hydrous indicator - data is valid • Fuel water sensor connector is out
P1852 but above normal operating range - of contact, the harness is open or
medium severity level shorted
• ECM

• 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
• 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