auto diagnostics software 2Turn the Chevy's ignition key to the run position

Ways to Reset the ECM & PCM on a Jetta 1Plug the cord from the scan tool into the diagnostic port, located below the steering column toward the driver's door.2Turn the ignition switch to " auto diagnostics software;ON."3Press the power button on the scan tool if it does not come on automatically.4Press the "scan" or "codes" Car Diagnostic Tools; button on the scan tool if the scan does not start automatically.

5Press the "clear" or "reset" button on the scan tool to reset the codes for both the ECM and PCM computer modules. Ways to Reset the ECM on a '92 Chevy Truck 1Climb into the truck's driver seat. Plug the scan tool's data cable into the truck's diagnostic port, which is located under the dashboard next to the steering column.

2Turn the Chevy's ignition key to the run position, but don't start the engine.3Follow the scan tool's specific operating instructions to run a quick test on the 1992 Chevy Truck's ECM.4Erase the trouble codes when the scan tool prompts you to do so. Complete the test according to the scan tool's specific operating instructions, and unplug the data cable from the port.5Turn the ignition key to off.