Aftermarket Back Up Alarm Sounds When Using RKE To Unlock Doors - keywords entry keyless lamp light lighting lock perimeter remote reverse

This PI was superseded to update model years. Please discard PIT4423.

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

The below procedure is not covered under warranty, due to the concern is caused by aftermarket/add-on equipment.

Some owners may comment that their aftermarket/add-on back up alarm will sound when unlocking the doors with the RKE remote. If the perimeter lighting is on and the ambient light sensor senses a low light condition when the RKE remote is used to unlock the doors, the reverse lights will turn on which in turn sounds the back up alarm.

To correct this concern turn off the perimeter lighting feature on vehicles with DIC control buttons or install an isolation relay in-line to the back up alarm per the procedure below.

Install an isolation relay, part number 12167112, in-line to the aftermarket/add-on back up alarm. Connect the relay in the following manner:

Connect the power feed to the back up alarm to relay pin 87 and relay pin 30 to the vehicles back up lamp circuit 24 or 1624. Ground pin 85 of the relay and provide a fused hot in run 12 volt power to pin 86 of the relay.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.