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
• -Monitor status
• -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
• -Time with MIL ON
• -Time after DTC memory erased
• -Misfire counter

Procedure 

-- Connect the scan tool.

-- Switch the ignition on.

-- Select Diagnostic Mode 03: Interrogating fault memory.

-- Then select Mode 4: Reset/delete diagnostic data.

The scan tool will display "Diagnostic data being erased".

-- Switch the ignition off.