For 1990-2009 cars

### Setup

Important:

• | When returning a replaced control unit, do not clear the fault memory.

• | the security code must be reset using Tech 2 when replacing or interchanging the engine control module, before removal.

The following service procedures require either a programming or a setup event be performed for a complete repair.

### ECM Replacement

If the engine control module (ECM) is replaced, you must perform the ECM Reprogramming. Refer to Service Programming System (SPS).

### ECM Reprogramming

If the ECM needs to be reprogrammed, refer to Service Programming System (SPS).