General Information

Component Location





General Description

The ECM provides ground to one side of the coil of the main relay and the other side is connected to the battery. The ECM monitors battery voltage and the voltage after the main relay.

DTC Description

Checking the controlling state of main relay every 10 sec. under detecting condition, if open or short in the circuit is detected for more than 5 sec., ECM sets P0685.

DTC Detecting Condition





** If Main relay has a fault (ex. Open) under engine running,
the DTCs,P0638/P0685/P1295/P2106, can happen at the same time.

- P0638 Throttle Actuator Control Range/Performance (Bank 1)
- P0685 ECM/ECM Power Relay Control Circuit/Open
- P1295 Throttle Actuator Control System-Power Management
- P2106 Throttle Actuator Control System-Forced Limited Power

Specification

Diagnostic Circuit Diagram