Pinpoint Test S : The Keyless Entry Keypad Illumination Is Inoperative Or Always On

WARNING: This page is about a different car, the 2018 Lincoln MKC. However, it is still accessible from the selected car via links, so may be relevant.

S1 CHECK THE KEYLESS ENTRY KEYPAD ILLUMINATION

NOTE: It is normal operation for the 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 S2

No GO to S4

S2 ISOLATE THE BCM (BODY CONTROL MODULE)
- Ignition OFF.
- Disconnect BCM C2280D .
- Ignition ON.
Is the keypad still illuminated?

Yes GO to S3

No GO to S10

S3 CHECK THE BCM (BODY CONTROL MODULE) KEYPAD ILLUMINATION OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE

Ignition OFF.

Disconnect Keyless Entry Keypad C597 .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C597-2	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit.

No	INSTALL a new front door moulding. REFER to: Front Door Upper Moulding .

S4 CHECK THE KEYLESS ENTRY KEYPAD OPERATION
- Press the 7/8 and 9/0 buttons simultaneously on the keyless entry keypad.
Do the doors lock using the keyless entry keypad?

Yes GO to S5

No GO to Pinpoint Test R

S5 CHECK FOR BCM (BODY CONTROL MODULE) DTC (DIAGNOSTIC TROUBLE CODE) B121A:11
- Ignition ON.
- Using a diagnostic scan tool, perform the BCM self-test.
Is DTC B121A:11 present?

Yes GO to S6

No GO to S8

S6 CHECK THE KEYLESS ENTRY KEYPAD FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect Keyless Entry Keypad C597 .
- Ignition ON.
- Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) and repeat the BCM self-test.
Is DTC B121A:11 still present?

Yes GO to S7

No INSTALL a new front door moulding. REFER to: Front Door Upper Moulding .

S7 CHECK THE KEYPAD ILLUMINATION OUTPUT CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Disconnect BCM C2280D .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C597-2	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to S10

No	REPAIR the circuit.

S8 CHECK THE BCM (BODY CONTROL MODULE) OUTPUT USING THE KEYPAD LAMP OUTPUT STATUS (KEY_PAD_LMP) PID (PARAMETER IDENTIFICATION)

Ignition OFF.

Disconnect Keyless Entry Keypad C597 .

Ignition ON.

Using a diagnostic scan tool, command the BCM KEY_PAD_LMP PID on.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C597-2	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes	INSTALL a new front door moulding. REFER to: Front Door Upper Moulding .

GO to S9

S9 CHECK THE BCM (BODY CONTROL MODULE) KEYPAD ILLUMINATION OUTPUT CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect BCM C2280D .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C597-2	Courtesy of FORD MOTOR COMPANY	C2280D-35

Is the resistance less than 3 ohms?

Yes

GO to S10

No	REPAIR the circuit.

S10 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, Refer to: BCM Hardware Testing -- MKC .

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.