Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

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.

Substitute value
- 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.

Fault symptom[s]
- The rheostat function on the audio system is not working.