Pinpoint Test N : The Keyless Entry Keypad Illumination Is Always On
WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
- N1 CHECK THE KEYLESS ENTRY KEYPAD ILLUMINATIONNOTE: It is normal operation for the keyless entry keypad to illuminate when the illuminated entry/exit feature is active. Make sure all the doors are closed and the feature times out.
- Ignition ON.
- Wait 45 seconds and observe the keyless entry keypad illumination.
Is the keyless entry keypad illumination always on?
Yes GO to N2 No The system is operating correctly. INFORM the customer of the normal keyless entry keypad illumination operation. - N2 ISOLATE THE BCM (BODY CONTROL MODULE)
- Ignition OFF.
- Disconnect: BCM C2280E .
- Ignition ON.
Does the keypad continue illuminate?
Yes GO to N3 No GO to N4 - N3 CHECK THE BCM (BODY CONTROL MODULE) KEYPAD ILLUMINATION OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: Keyless Entry Keypad C500 .
- Ignition ON.
- Measure:
Positive Lead Measurement / Action Negative Lead C500-2 Ground
Is any voltage present?
Yes REPAIR the circuit. No INSTALL a new keyless entry keypad. REFER to: Keyless Entry Keypad . - N4 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
- Disconnect and inspect all the BCM connectors.
- Repair:
- corrosion (install new connectors or terminals - clean module pins)
- damaged or bent pins - install new terminals pins
- pushed-out pins - install new pins as necessary
- Reconnect the BCM connectors and make sure they seat and latch correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM, or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, BCM guided routine is not applicable for this vehicle and market. Replace the component that was faulted through service information diagnosis. No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.