Diagnostic trouble code (DTC) information

Condition 

Diagnostic trouble code (DTC) AEM-4F63 is stored if the control module registers that the signal is too high or there is an open-circuit in the buzzer cable from the back-up (reversing) warning system during the first 0.2-2.5 seconds after the back-up (reversing) warning system is activated.

The diagnostic trouble code (DTC) can be diagnosed when the ignition is on and the back-up (reversing) warning system is activated, i. e. back-up (reverse) gear is selected.

Substitute Value 

• The back-up (reversing) warning system is switched off.

Possible Source 

• Short-circuit to supply voltage in the buzzer cable from the back-up (reversing) warning system
• Open-circuit in the buzzer cable from the back-up (reversing) warning system
• Defective back-up (reversing) buzzer.

Fault symptom[s] 

• The back-up (reversing) warning system does not function.