AEM-7A12

Condition
Diagnostic trouble code (DTC) AEM-7A12 is stored if the control module registers that the signal is too low, too high or if there is an open-circuit in the signal cable (rheostat) for the radio.

The diagnostic trouble code (DTC) can be diagnosed when the ignition is on and the signal cable (rheostat) is activated.

Condition
- None.

Possible source
- Short-circuit to ground in the signal cable (rheostat) for the radio
- Short-circuit to supply voltage in the signal cable (rheostat) for the radio
- Open-circuit in the signal cable (rheostat) for the radio
- Defective radio.

Condition
- The rheostat function on the audio system is not working.