Diagnostic trouble code (DTC) information

Condition 

Diagnostic trouble code (DTC) AEM-1A01 is stored if the control module registers that the power supply to the auxiliary electronic module differs by more than two volts from the power supply to the central electronic module.

The diagnostic trouble code (DTC) can be diagnosed when the ignition is on.

Substitute Value 

• None.

Possible Source 

• Open-circuit or short-circuit to ground in the 30-supply to the accessory electronic module
• Contact resistance, oxidation or loose connections in the 30-supply to the accessory electronic module.

Fault symptom[s] 

• Accessories connected to the control module do not function.