Clearing Trouble Codes (Except SATURN)

Trouble codes are cleared by removing battery voltage from ECM for at least 30 seconds. Ensure test terminal is not grounded. Turn ignition switch off and remove ECM fuse from fuse block for 30 seconds, and then reinsert fuse. Another way of removing battery voltage is to disconnect the battery positive cable (or pigtail) from the battery for 30 seconds, and then reconnect it. In either case, ensure the ignition switch is in the OFF position before removing battery voltage. Otherwise, a voltage spike could occur and damage the ECM. When power to ECM is removed, degraded driveability may be exhibited until control module relearns optimum operational parameters. See COMPUTER RELEARN PROCEDURES article in the GENERAL INFORMATION section. See menu below.