Troubleshooting

EGR Valve Learn Reset
Use this reset when the Exhaust Gas Recirculation
(EGR) valve is replaced.
Rail Pressure Valve Learn Reset
Use this reset when the fuel rail pressure valve is
replaced. This reset will reset the counter in the ECM
for the number of times that the pressure relief valve
has opened.
DPF Ash Cleaning
Use this reset when the Diesel Particulate Filter
(DPF) has been cleaned and reinstalled. Refer to
Systems Operation, Testing and Adjusting, “Diesel
Particulate Filter - Clean” for details.
Lambda Sensor Learn Reset
Use this reset when the oxygen sensor is replaced.
Lambda Sensor Temperature Learn
Reset
Use this reset when the oxygen sensor is replaced.
DPF Differential Pressure Sensor
Replacement
Use this reset when the DPF differential pressure
sensor is replaced.
DPF Replacement Reset
Use this reset when a new DPF is installed. Refer to
Systems Operation, Testing and Adjusting, “Diesel
Particulate Filter - Clean” for details.
i06233880
Electronic Service Tool Does
Not Communicate
Probable Causes
• Configuration of the communications adapter
• Electrical connectors
• Communication adapter and/or cables
• Electrical power supply to the diagnostic
connector
• Electronic service tool and related hardware
• Electrical power supply to the Electronic Control
Module (ECM)
Recommended Actions
Note: The procedures have been listed in order of
probability. Complete the procedures in order.
256 UENR0612-07
Service
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