Page 918 - Workshop Manual - Tunland (2017)
P. 918
04-232 DIAGNOSTICS - ENGINE CONTROL SYSTEM
04
P3251，P3253，P3254-POSTPROCESSING 1 DIESEL OXIDATION
CONVERTER INLET TEMPERATURE FAILURE
P3251-POSTPROCESSING 1 PREHEAT DIESEL OXIDATION
CONVERTER INLET TEMPERATURE - DATA IS VALID BUT
ABOVE NORMAL OPERATING RANGE - MEDIUM SEVERITY
LEVEL
P3253-POSTPROCESSING 1 DIESEL PARTICULATE FILTER
INLET TEMPERATURE - DATA IS VALID BUT ABOVE NORMAL
OPERATING RANGE - MEDIUM SEVERITY LEVEL
P3254-POSTPROCESSING 1 DIESEL PARTICULATE FILTER
INLET TEMPERATURE - DATA IS VALID BUT ABOVE NORMAL
OPERATING RANGE - LOWEST SEVERITY LEVEL
Description
1 . The DOC inlet temperature sensor is an intelligent device that communicate with
ECM via the J1939 data communication interface.The DOC inlet temperature
sensor monitors the engine exhaust temperature into the DOC.The DOC inlet
temperature sensor performs autonomous diagnosis and reports failure to the
main engine ECM.The DOC inlet temperature sensor is permanently fixed on
the postprocessing preheat DPF temperature sensor module.They work as a
single unit and cannot be replaced separately.
