Checking the power supply and ground for the audio module (AUM)
Check the fuse in the passenger compartment fusebox for the main unit/audio module (AUM).
If the fuse has blown, check the circuit after the fuse before replacing the fuse. Check for a short-circuit to ground. Then replace the fuse. For further information about the circuit after the fuse, refer to the appropriate wiring diagram.
Check the connector for the main unit/audio module (AUM). Check for contact resistance and oxidation.
Check the power supply cable for the main unit/audio module (AUM). Check for an open-circuit.
Check the ground cable between the main unit/audio module (AUM) and the ground terminal. Check for an open-circuit. Also check the ground terminal. Check for contact resistance and oxidation.
Remedy as necessary.
Other information:
- To replace the fuses, see Fusebox, passenger compartment, replacing
- To replace the main unit/audio module (AUM), see Radio cassette player, replacing
- To connect the breakout box, see Connecting the breakout box, Audio control module
- For information about signals and connectors, see Signal specification, audio control module
- For information about checking wiring and terminals see Checking wiring and terminals .
Was a fault detected?
- YES
- NO
Refer to Signal missing