Clearing Diagnostic Trouble Codes

Diagnostic Modes 01 - 09

Diagnostic Mode 04 - Erase DTC Memory

Function

Diagnostic Mode 04 makes it possible to erase the DTC memory and to reset all emissions-related diagnostic data. In that way, all faults in the DTC memory in the ECM and TCM are erased. The adaptation values may also be reset.

Emissions-related diagnostic data includes (as applicable):

• - MIL Status

• - Number of DTCs

• - Readiness Bits

• - Confirmed DTCs

• - Pending DTCs

• - DTC that belongs to freeze frame

• - Freeze frame data

• - Test results of specific diagnostic functions

• - Distance driven with "MIL ON"

• - Number of Warm-Up Cycles after erasing the DTC memory

• - Distance driven after erasing the DTC memory

• - Misfire counter

Prerequisite

• DTC memory was checked --> [ Diagnostic Mode 03 - Read DTC Memory ]

Procedure

- Connect diagnostic tester.

- Start engine and let run at idle.

- Under address word 33, select "Diagnostic mode 4: Reset/erase diagnostic data.

Erased or reset:

• Number and content of the DTC memories,

• Operating conditions,

• Adaptation values,

• Test results.

- End diagnosis and switch ignition off.

- Generate readiness code --> [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.