Diagnostic trouble code (DTC) information

Condition 

Diagnostic trouble code (DTC) AEM-5F20 is stored if the control module registers that the signal is too low in the power supply for the remote start unit.

The diagnostic trouble code (DTC) can be diagnosed when the ignition is on and the remote start unit is activated (the remote start unit is always activated).

Substitute Value 

• None.

Possible Source 

• Short-circuited to ground in the power supply cable for the remote start unit
• Defective remote start unit.

Fault symptom[s] 

• The parking heater does not operate.