Pinpoint Test P: The Manual Liftgate Latch Release Is Inoperative (If Equipped)

NOTE: This pinpoint test does not diagnose liftgate release concerns for vehicles with the power liftgate feature. Refer to BODY CLOSURES for power liftgate diagnostics.

P1 CHECK THE LIFTGATE LATCH MANUAL RELEASE
- Mechanically unlatch the liftgate. Refer to: Liftgate Latch Manual Release .
Does the liftgate latch release?

Yes GO to P2

No INSTALL a new liftgate latch. Refer to: Liftgate Latch .

P2 CHECK THE LIFTGATE RELEASE INPUT FOR A SHORT TO GROUND USING THE BCM (BODY CONTROL MODULE) LIFTGATE RELEASE SWITCH STATUS (LFTGATE_R_SW) PID (PARAMETER IDENTIFICATION)
- Ignition ON.
- Using a diagnostic scan tool, view the BCM Parameter Identifications (PIDs).
- Using a diagnostic scan tool, view the BCMPID LFTGATE_R_SW.
Does the PID indicate the liftgate release switch is continuously pressed?

Yes GO to P3

No GO to P5

P3 CHECK THE LIFTGATE RELEASE SWITCH USING THE BCM (BODY CONTROL MODULE) LIFTGATE RELEASE SWITCH STATUS (LFTGATE_R_SW) PID (PARAMETER IDENTIFICATION)
- Ignition OFF.
- Disconnect: Liftgate Release Switch C4340.
- Ignition ON.
- Using a diagnostic scan tool, view the BCMPID LFTGATE_R_SW.
Does the PID continue to indicate the switch is pressed?

Yes GO to P4

No INSTALL a new liftgate release switch. Refer to: Liftgate Release Switch .

P4 CHECK THE LIFTGATE RELEASE SWITCH INPUT CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Disconnect: BCM C2280E.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280E-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to P12

No	REPAIR the circuit.

P5 CHECK THE BCM (BODY CONTROL MODULE) LIFTGATE RELEASE SWITCH STATUS (LFTGATE_R_SW) PID (PARAMETER IDENTIFICATION)
- Using a diagnostic scan tool, view the BCM LFTGATE_R_SW PID while pressing the liftgate release switch.
Does the PID indicate the switch is pressed?

Yes GO to P8

No GO to P6

P6 BYPASS THE LIFTGATE RELEASE SWITCH WHILE MONITORING THE BCM (BODY CONTROL MODULE) LIFTGATE RELEASE SWITCH STATUS (LFTGATE_R_SW) PID (PARAMETER IDENTIFICATION)

Ignition OFF.

Disconnect: Liftgate Release Switch C4340.

Ignition ON.

Connect:

Lead 1	Measurement / Action	Lead 2
C4340-1	Courtesy of FORD MOTOR COMPANY	C4340-2

Using a diagnostic scan tool, view the BCM LFTGATE_R_SW PID.

Does the PID indicate the switch is pressed?

Yes	REMOVE the fused jumper wire. INSTALL a new liftgate release switch. Refer to: Liftgate Release Switch .

No	REMOVE the fused jumper wire. GO to P7

P7 CHECK THE LIFTGATE RELEASE SWITCH INPUT CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect: BCM C2280E.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C4340-1	Courtesy of FORD MOTOR COMPANY	C2280E-1

Is the resistance less than 3 ohms?

Yes

GO to P12

No	REPAIR the circuit.

P8 CHECK FOR VOLTAGE TO THE LIFTGATE LATCH RELEASE MOTOR

NOTE: The following step uses a test lamp to simulate normal circuit loads. Use only a Rotunda Test Lamp (SGT27000) or 250-300mA incandescent bulb test lamp. To avoid connector terminal damage, use the Rotunda Flex Probe kit for the test lamp probe connection to the vehicle. Do not use the test lamp probe directly on any connector.

Ignition OFF.

Disconnect: Liftgate Latch C457A.

Ignition ON.

Connect:

Positive Lead	Measurement / Action	Negative Lead
C457A-2	Courtesy of FORD MOTOR COMPANY	Ground

Unlock the doors using a door lock control switch.

NOTE: The BCM only supplies voltage to the release motor momentarily. It is important to monitor the test lamp while pressing the liftgate release switch.

While pressing the liftgate release switch, monitor the test lamp.

Does the test lamp momentarily illuminate?

Yes

GO to P9

GO to P10

P9 CHECK THE LIFTGATE LATCH RELEASE MOTOR GROUND CIRCUIT FOR AN OPEN

Connect:

Positive Lead	Measurement / Action	Negative Lead
C457A-2	Courtesy of FORD MOTOR COMPANY	C457A-5

NOTE: The BCM only supplies voltage to the release motor momentarily. It is important to monitor the test lamp while pressing the liftgate release switch.

While pressing the liftgate release switch, monitor the test lamp.

Does the test lamp momentarily illuminate?

Yes	INSTALL a new liftgate latch. Refer to: Liftgate Latch .

No	REPAIR the circuit.

P10 CHECK THE LIFTGATE LATCH RELEASE MOTOR VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Disconnect: BCM C2280C.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C457A-2	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to P11

No	REPAIR the circuit.

P11 CHECK THE LIFTGATE LATCH RELEASE MOTOR VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C457A-2	Courtesy of FORD MOTOR COMPANY	C2280C-31

Is the resistance less than 3 ohms?

Yes

GO to P12

No	REPAIR the circuit.

P12 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,

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.