PINPOINT TEST H: The Keyless Entry Keypad Illumination Is Inoperative Or Always On

WARNING: This page is about a different car, the 2013 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

H1 CHECK THE KEYLESS ENTRY KEYPAD ILLUMINATION
- Ignition OFF.
- Check the keyless entry keypad illumination.
Is the keyless entry keypad illumination always on?
- Yes : GO to H9.
- No : GO to H2 .
H2 CHECK THE KEYLESS ENTRY KEYPAD INPUT TO THE BCM
- Using a scan tool, monitor the BCM PIDs KYPD_BTN_1/2, KYPD_BTN_7/8, and KYPD_BTN_9/0.
- Touch several keyless entry keypad buttons while viewing the BCM PIDs .
Do the PIDs display active when the corresponding button is touched?
- Yes : GO to H3 .
- No : GO to PINPOINT TEST G .
H3 CHECK THE BCM DTCs FROM THE SELF-TEST
- Using a scan tool, perform the BCM self-test.
Is DTC B121A:11 present?
- Yes : GO to H4 .
- No : GO to H6.
H4 CHECK THE KEYLESS ENTRY KEYPAD FOR A SHORT TO GROUND
- Disconnect: Keyless Entry Keypad.
- Using a scan tool, clear the BCM DTCs .
- Using a scan tool, perform the BCM self-test.
Is DTC B121A:11 still present?
- Yes : GO to H5 .
- No : INSTALL a new keyless entry keypad. REFER to KEYLESS ENTRY KEYPAD .

H5 CHECK THE KEYPAD ILLUMINATION OUTPUT CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.
Disconnect: BCM C2280C.

Measure:

Positive Lead	Measurement/Action	Negative Lead
C500-2		Ground

Is the resistance greater than 10, 000 ohms?

Yes : GO to H10.
No : REPAIR the circuit.

H6 CHECK THE KEYPAD ILLUMINATION OUTPUT CIRCUIT FOR REFERENCE VOLTAGE

Disconnect Keyless Entry Keypad.

Measure:

Positive Lead	Measurement/Action	Negative Lead
C500-2		Ground

Are 11 volts (+/- 1 volt) present?

Yes : GO to H7 .
No : GO to H8.

H7 CHECK FOR BCM OUTPUT

Using a scan tool, view BCM PIDs .

While active commanding the BCM PID (KEY_PAD_LMP) ON, measure:

Positive Lead	Measurement/Action	Negative Lead
C500-2		Ground

Does the voltage increase at least 1 volt greater than the reference voltage?

Yes : INSTALL a new keyless entry keypad. REFER to KEYLESS ENTRY KEYPAD .
No : GO to H10.

H8 CHECK THE KEYPAD ILLUMINATION OUTPUT CIRCUIT FOR AN OPEN

Ignition OFF.
Disconnect BCM C2280C.

Measure:

Positive Lead	Measurement/Action	Negative Lead
C500-2		C2280C-26

Is the resistance less than 3 ohms?

Yes : GO to H10.
No : REPAIR the circuit.

H9 CHECK THE KEYPAD ILLUMINATION OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE
- Disconnect BCM C2280C.
- Ignition ON.
- Observe the keypad illumination.
Is the keypad still illuminated?
- Yes : REPAIR the circuit.
- No : GO to H10 .
H10 CHECK FOR CORRECT BCM OPERATION
- Ignition OFF.
- Disconnect and inspect all BCM connectors.
- Repair:
  - corrosion (install new connector or terminals - clean module pins)
  - damaged or bent pins - install new terminals/pins
  - pushed-out pins - install new pins as necessary
- Reconnect all BCM connectors. 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 TSBs . If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to BODY CONTROL MODULE (BCM) -- WITHOUT INTELLIGENT ACCESS (IA) .
- 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.