With Generic Scan Tool

The ECM consists of a microcomputer, a diagnostic test mode selector, and connectors for signal input and output and for power supply. The unit controls the engine.

DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE


With Generic Scan Tool
(1) Turn ignition switch "ON".
(2) Start engine and wait at least 30 seconds.
(3) Select "Mode 7" with GST.






FAIL-SAFE MODE
When the ECM enters the fail-safe mode, the MIL illuminates.






DIAGNOSTIC PROCEDURE