Diagnostic Mode 04 - Erase DTC Memory

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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

NOTE:

Depending on the scan tool and protocol used, diagnostic mode 04 and the information provided may be referred to by a different name.

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.