Operation CHARM: Car repair manuals for everyone.

Checking the Control Module Power Supply




Checking The Control Module Power Supply







- Ignition off.
- Disconnect the control module.
- Selector switch connected.
- Ignition on.
- Selector switch on.

Connect a voltmeter between control module connector terminal 5 and ground.

The voltmeter should read battery voltage when the SET- switch is activated. The voltmeter should read 0 V when the SET- switch is not activated.

- 1. The value is OK.
- 2. The voltmeter reads 0 V.
- 3. The voltmeter reads battery voltage when the SET+ switch is not activated.

Select one of the above options.

1 - Checking the Control Module Connectors

2 - Check Cable Between the Selector Switch and the Control Module

3 - Checking For A Short-Circuit