Section 411 (Engine Controls - Self-Diagnostics): Programming: Notes

WARNING: This page is about a different car, the 2003 Saturn Ion 3, 2003 Saturn Ion 2, and 2003 Saturn Ion 1. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: DO NOT program an existing ECM with the identical software/calibration package. This procedure is not a short cut to correct a driveability condition. This is an ineffective repair. A ECM should only be programmed when a service procedure instructs you to replace the ECM. The service part ECM does not contain operating software or calibrations or General Motors Corporation releases an updated software/calibration package.

After replacing Engine Control Module (ECM) or if program needs to be updated, refer to latest Techline(R) information on ECM reprogramming. ECM can only be programmed using Tech 2 and Techline(R) terminal, or by using a personal computer equipped with the current service programming system software installed.