Diagnostic Mode 04 - Erase DTC Memory

Diagnostic Modes 01 - 09

Diagnostic Mode 04 - Erase DTC Memory

The information provided in Modes 01 through 09 displays the various levels of emission related data that may be monitored, as well as the ability to retrieve and read stored DTC trouble codes, erase stored DTC trouble codes, generate readiness codes, and select the various PIDs and Test-IDs used within the modes to monitor the engine, and emission related component parameters.

• Depending on scan tool and protocol used, the information in diagnostic mode 01 may be referred to by different names such as Test-ID (TID), Hex-ID, Component-ID (CID), or On-Board Diagnostic Monitor Identifier (OBDMID).

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

- Connect diagnostic tester.

- Start engine and let run at idle.

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

Erased or reset:

• Number and content of DTC memories,

• Operating conditions,

• Adaptation values,

• Test results.

- End diagnosis and switch ignition off.

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