Page 924 - Workshop Manual - Tunland (2017)

04-238 DIAGNOSTICS - ENGINE CONTROL SYSTEM

04
P3255，P3256，P3312，P3319,P3321-POSTPROCESSING DIESEL
PARTICULATE FILTER OUTLET TEMPERATURE FAULT
P3255-POSTPROCESSING DIESEL PARTICULATE FILTER

OUTLET TEMPERATURE - DATA IS VALID BUT ABOVE NORMAL
OPERATING RANGE - MEDIUM SEVERITY LEVEL
P3256-POSTPROCESSING DIESEL PARTICULATE FILTER

OUTLET TEMPERATURE - DATA IS VALID BUT ABOVE NORMAL
OPERATING RANGE - LOWEST SEVERITY LEVEL

P3312-POSTPROCESSING DIESEL PARTICULATE FILTER
OUTLET TEMPERATURE - DATA IS VALID BUT ABOVE NORMAL
OPERATING RANGE - HIGHEST SEVERITY LEVEL

P3319-POSTPRECESSING DIESEL PARTICULATE FILTER
OUTLET TEMPERATURE SENSOR CIRCUIT - VOLTAGE IS ABOVE

NORMAL OR SHORTED TO HIGH VOLTAGE POWER SUPPLY
Description

1 . The postprocessing DPF outlet temperature sensor is an intelligent device that
communicate with ECM via the J1939 data communication interface.The
postprocessing DPF outlet temperature sensor monitors the engine exhaust
temperature into the DOC.The DPF outlet temperature sensor performs
autonomous diagnosis and reports failure to the main engine ECM.The DPF
outlet temperature sensor is permanently fixed on the postprocessing DPF
temperature sensor module.They work as a single unit and cannot be replaced
separately.