Diagnostic Mode 04 - Erase DTC Memory

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 erased → Diagnostic Mode 03 - Read DTC Memory  .

Procedure 

• Connect diagnostic tester → Diagnostic Tester, Connecting .
• Start engine and let run at idle.
• Under address word 33, select "Diagnostic mode 4: Reset/erase diagnostic data.

Will be erased:

• Number and content of the DTC memories,
• Operating conditions,
• Test results.

• End diagnosis and switch ignition off.