Checking Power Supply and Ground For the Accessory Electronic Module (AEM)

Checking power supply and ground. Permanent fault

Checking the supply
Check passenger compartment fuse 24 (11C/24:2).
Check the cable between supply relay (2/29) for the combined instrument panel terminal #3 and passenger compartment fuse 24 (11C/24:2). Check for an open-circuit. Check for a short-circuit to ground.
Check that the relay is not defective.
Check the cable between combined instrument panel terminal #6 and parking brake connector terminal #1. Check for a short-circuit to ground. Remedy if necessary.
Check the cable between combined instrument panel terminal #1 and supply relay (2/29) for the combined instrument panel terminal #1. Check for an open-circuit. Check for a short-circuit to ground.
Check the cable between combined instrument panel terminal #14 and ground. Check for an open-circuit. Check for a short-circuit to supply voltage.
Remedy as necessary

Other information:
- Connecting the breakout box Connecting the Breakout Box, Accessory Electronic Module (AEM)
- Checking wiring and terminals Checking Wiring and Terminals









Continue - Checking the ground terminal

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Checking the ground terminal




- Ignition off
- Control module disconnected
- Switch off all power consuming equipment (courtesy lighting, radio etc).
Connect an ohmmeter between terminal #14 on the breakout box and the battery negative terminal.

Other information
- Connecting the breakout box Connecting the Breakout Box, Accessory Electronic Module (AEM)
- Signal specification Signal Specification, Accessory Electronic Module (AEM).









The ohmmeter should read approximately 0 ohms.

OK - FAULT FOUND

Not OK - Checking for open-circuits, contact resistance and oxidation

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Checking for open-circuits, contact resistance and oxidation
Check ground terminal 31/83. Check for an open-circuit. Check for contact resistance. Check for oxidation.

Other information
- Checking wiring and terminals Checking Wiring and Terminals





Was a fault detected?

Yes - FAULT FOUND

No - No Fault Found

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