Reading and Clearing Diagnostic Trouble Codes

The DTCs in EBCM memory are erased in one of two ways:
- Scan tool.
- Ignition cycle default.
These two methods are detailed below. Be sure to verify proper system operation and absence of DTCs when the clearing procedure is completed. The EBCM will not permit DTC clearing until all DTCs have been displayed. Also, DTCs cannot be cleared by unplugging the EBCM, disconnecting the battery cables, or turning the ignition switch to the OFF position (except on an ignition cycle default).

SCAN TOOL METHOD
Select DTC(s) for diagnostic trouble codes. After DTCs have been viewed completely, scan tool will ask, CLEAR DTCs?, answer YES. Scan tool will then read, HISTORY DATA WILL BE LOST. CLEAR DTCs? Answer YES and DTCs will be cleared.

IGNITION CYCLE DEFAULT
If no diagnostic trouble codes occur for 100 drive cycles [a drive cycle occurs when the ignition is turned to RUN and the vehicle is driven faster than 16 km/h (10 mph)], any existing DTCs are automatically cleared from the EBCM memory.