Pinpoint Test R: The Liftgate IA Feature Is Inoperative

NOTE: The IA feature is a programmable parameter and can be enabled/disabled with a scan tool. If the feature is disabled, the IA feature to enter the vehicle and passive starting is inoperative. To start the vehicle, the IA key must be placed in the backup transceiver slot.

R1 CHECK THE POWER LIFTGATE OPERATION FROM THE LIFTGATE RELEASE SWITCH
- Unlock the doors using the door lock control switch.
- Press the liftgate release button located on the liftgate.
Does the power liftgate open?
- Yes : GO to R2 .
- No : REFER to BODY CLOSURES .
R2 CHECK THE RKE OPERATION
- Close the liftgate.
- Press the liftgate button twice on an IA key.
Does the power liftgate open?
- Yes : GO to R3 .
- No : GO to PINPOINT TEST O .
R3 CHECK THE LIFTGATE IA ANTENNA
- Ignition OFF.
- Disconnect: Liftgate IA Antenna C4029 .
- Measure the resistance between the liftgate IA antenna pin 1, component side and the liftgate IA antenna pin 2, component side.
  
  Fig 1: Measuring Resistance Between Liftgate IA Antenna Pin 1 And Liftgate IA Antenna Pin 2
  Courtesy of FORD MOTOR CO.
Is the resistance between 0.3 and 0.6 ohms?
- Yes : GO to R4 .
- No : INSTALL a new liftgate IA antenna. REFER to INTELLIGENT ACCESS (IA) ANTENNA - LIFTGATE .
R4 CHECK THE LIFTGATE IA ANTENNA CIRCUITS FOR A SHORT TO VOLTAGE
- Disconnect: RFA Module C2153A .
- Ignition ON.
- Measure the voltage between the liftgate IA antenna C4029-1 , circuit VPK07 (VT), harness side and ground; and between the liftgate IA antenna C4029-2 , circuit RPK07 (GN/OG), harness side and ground.
  
  Fig 2: Measuring Voltage Between Liftgate IA Antenna C4029-1 And Ground
  Courtesy of FORD MOTOR CO.
Is any voltage present?
- Yes : REPAIR the circuit in question.
- No : GO to R5 .
R5 CHECK THE LIFTGATE IA ANTENNA CIRCUITS FOR A SHORT TO GROUND
- Ignition OFF.
- Measure the resistance between the liftgate IA antenna C4029-1 , circuit VPK07 (VT), harness side and ground; and between the liftgate IA antenna C4029-2 , circuit RPK07 (GN/OG), harness side and ground.
  
  Fig 3: Measuring Resistance Between Liftgate IA Antenna C4029-1 And Ground
  Courtesy of FORD MOTOR CO.
Are the resistances greater than 10, 000 ohms?
- Yes : GO to R6 .
- No : REPAIR the circuit in question.

R6 CHECK THE LIFTGATE IA ANTENNA CIRCUITS FOR AN OPEN

Measure the resistance between the liftgate IA antenna, harness side and the RFA module, harness side as follows:

Liftgate IA Antenna Connector-Pin	Circuit	RFA Module Connector-Pin
C4029-1	VPK07 (VT)	C2153A-15
C4029-2	RPK07 (GN/OG)/(GN)	C2153A-16

Fig 4: Measuring Resistance Between Liftgate IA Antenna And RFA Module

Courtesy of FORD MOTOR CO.

Are the resistances less than 3 ohms?

Yes : GO to R7 .
No : REPAIR the circuit in question.

R7 CHECK FOR CORRECT RFA MODULE OPERATION
- Disconnect and inspect all RFA module 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 the RFA module 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 On-Line Automotive Service Information System (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 RFA module. REFER to MULTIFUNCTION ELECTRONIC MODULES .
- 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.