Page 926 - Workshop Manual - Tunland (2017)

04-240 DIAGNOSTICS - ENGINE CONTROL SYSTEM

04 DTC inspection
DTC DTC definition Trouble location
conditions

• Postprocessing
DPF outlet
Postprocessing diesel temperature sensor
particulate filter outlet
• Postprocessing
temperature - data is
DPF temperature
P3255 valid but above
sensor module and
normal operating its harness
range - medium
• Postprocessing
severity level
system
• ECM

• Postprocessing
• When the engine is DPF outlet
Postprocessing diesel
running and the temperature sensor
particulate filter outlet postprocessing • Postprocessing
temperature - data is
diesel particulate DPF temperature
P3256 valid but above
filter is under active sensor module and
normal operating
regeneration, the its harness
range - lowest
diagnosis continues • Postprocessing
severity level
to run. system
• ECM

• Postprocessing
DPF outlet
Postprocessing diesel
temperature sensor
particulate filter outlet
• Postprocessing
temperature - data is
DPF temperature
P3312 valid but above sensor module and
normal operating
its harness
range - highest
• Postprocessing
severity level
system
• ECM
• Postprocessing
DPF outlet
Postprecessing diesel temperature sensor
particulate filter outlet
• Postprocessing
temperature sensor
• When the key DPF temperature
P3319 circuit - voltage is
switch is in ON sensor module and
above normal or
position, the its harness
shorted to high • Postprocessing
voltage power supply diagnosis continues
to run. system
• ECM

Postprocessing diesel • Postprocessing
P3321 particulate filter outlet DPF outlet
temperature sensor temperature sensor