Diagnostic trouble code (DTC) information

Condition 

Diagnostic trouble code (DTC) AEM-5F22 is stored if the control module registers that the signal is too low in the signal cable from the remote start unit for more than 3 seconds, when the function is activated. The function is activated when the remote start unit receives a start signal from an external transmitter.

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

Substitute Value 

• None.

Possible Source 

• Short-circuit to ground in the signal cable for the remote start unit
• Defective remote start unit.

Fault symptom[s] 

• The parking heater does not operate.