LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2013 >> Edge SEL, 2.0L Eng VIN 9 >> Repair and Diagnosis >> External Pages >> Different car >> Section 294 (Body Panel System - Body Closures) >> Diagnosis And Testing >> Power Liftgate >> Pinpoint Tests >> Pinpoint Test A: The Power Liftgate is Inoperative - Does Not Open or Close >> Pinpoint Test A: The Power Liftgate Is Inoperative - Does Not Open Or Close

Pinpoint Test A: The Power Liftgate Is Inoperative - Does Not Open Or Close

WARNING: This page is about a different car, the 2014 Lincoln MKX and 2014 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) from the Flex Probe Kit when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. A1 CHECK THE OPERATION OF THE POWER LIFTGATE SWITCHES 
    • Vehicle in park.
    • NOTE: Make sure the power liftgate is enabled (on) in the vehicle message center.

      Close the liftgate to the full closed position (manually if necessary).

    • Activate the power liftgate from the power liftgate control switch (instrument panel).
    • Activate the power liftgate from an Remote Keyless Entry (RKE) transmitter.
    • Activate the power liftgate from the exterior liftgate switch.

    Does the power liftgate power open from any switch? 

  2. A2 RETRIEVE THE DTCs FROM THE LTM 
    • Use the recorded Liftgate/Trunk Module (LTM) DTCs from the self-test.

    Are any LTM DTCs recorded? 

    • Yes  : For DTC B2552, GO to  A3.

      For DTC B2908, GO to  A5.

      For DTC B2418, B2419, or B2420, GO to  A10.

      For DTC B1179, B117A, B117B, B2936, B2819, or B2937, GO to  A19.

      For all other LTM  DTCs, REFER to LIFTGATE/TRUNK MODULE (LTM) DTC CHART .

    • No  : GO to  A3.
  3. A3 CHECK FOR VOLTAGE TO THE LTM 
    • Ignition OFF.
    • Disconnect: LTM C4174A  .
    • Measure the voltage between:
      • LTM C4174A-9  , circuit SBP09 (RD), harness side and ground.
      • LTM C4174A-4  , circuit SBB07 (WH/RD), harness side and ground.
        Fig 1: Measuring Voltage Between LTM C4174A-9, Circuit SBP09 (RD), Harness Side And Ground
        GF0043686Courtesy of FORD MOTOR CO.

    Are the voltages greater than 11 volts? 

    • Yes  : GO to  A4.
    • No  : VERIFY Body Control Module (BCM) fuse 9 (10A) or the Battery Junction Box (BJB) fuse 7 (30A) is OK. If OK, REPAIR the circuit.

      If not OK, REFER to the SYSTEM WIRING DIAGRAMS to identify the possible causes of the circuit short.

  4. A4 CHECK THE LTM GROUND FOR AN OPEN 
    • Measure the resistance between LTM C4174A-1  , circuit GD149 (BK/GY), harness side and ground.
      Fig 2: Measuring Resistance Between LTM C4174A-1, Circuit GD149 (BK/GY) And Ground
      G06070699Courtesy of FORD MOTOR CO.

    Is the resistance less than 3 ohms? 

    • Yes  : RECONNECT the LTM C4174A  and GO to  A5.
    • No  : REPAIR the circuit.
  5. A5 CHECK THE DETENT AND FORKBOLT SWITCH PIDs 
    • Enter the following diagnostic mode on the scan tool: LTM  DataLogger.
    • Operate the liftgate manually while monitoring the following LTM  PIDs:
      • Detent Switch Status (DETENTSW)
      • Forkbolt Switch Status (FORKBLT_S)
      • Forkbolt Secondary Switch (FKSWSEC)
    • NOTE: The liftgate is in the primary position when the liftgate is in the full closed position. The liftgate is in the unlatch position when the liftgate is open and completely out of the striker.

      Begin with the liftgate in the open position, then slowly close the liftgate into each of the latch positions specified by the table below.

      Liftgate Latch Position DETENTSW FORKBLT_S FKSWSEC
      Fully Unlatched Inactive(1) Active Active
      Primary Active Inactive Inactive
      (1) If detent switch is active in the fully unlatched position, manually attempt to rotate the forkbolt towards the latched position.

    Do the switch states agree with the table? 

    • Yes  : GO to  A10.
    • No  : GO to  A6.
  6. A6 CHECK THE OPERATION OF THE DETENT AND FORKBOLT SWITCHES 
    • Ignition OFF.
    • Disconnect: LTM C4174B  .
    • Measure the resistance between LTM C4174B  , harness side and ground at each of the connector pins and each latch position specified by the table below.
      Liftgate Latch Position LTM  Connector-Pin Circuit Resistance
      Fully Unlatched C4174B-16  CPR66 (GY/YE) Greater than 10, 000 ohms(1)
      Fully Unlatched C4174B-18  CPR64 (VT/OG) Less than 3 ohms
      Fully Unlatched C4174B-17  CPR65 (BU/GN) Less than 3 ohms
      Primary C4174B-16  CPR66 (GY/YE) Less than 3 ohms
      Primary C4174B-17  CPR64 (VT/OG) Greater than 10, 000 ohms
      Primary C4174B-18  CPR65 (BU/GN) Greater than 10, 000 ohms
      (1) If resistance measured is less than 3 ohms, manually rotate the forkbolt to the latched position and retest.
      Fig 3: Measuring Resistance Between LTM C4174B, Harness Side And Ground
      G09298462Courtesy of FORD MOTOR CO.

    Do the resistance values agree with the table? 

    • Yes  : GO to  A10.
    • No  : GO to  A7.
  7. A7 CHECK THE DETENT AND FORKBOLT SWITCH GROUND CIRCUIT 
    • Disconnect: Power Liftgate Latch C4339  .
    • Measure the resistance between power liftgate latch C4339-8  , circuit GD149 (BK/GY), harness side and ground.
      Fig 4: Measuring Resistance Between Power Liftgate Latch C4339-8, Circuit GD149 (BK/GY) And Ground
      G06284323Courtesy of FORD MOTOR CO.

    Is the resistance less than 3 ohms? 

    • Yes  : GO to  A8.
    • No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the LTM  self-test.
  8. A8 CHECK THE DETENT AND FORKBOLT SWITCH CIRCUITS FOR AN OPEN 
    • Measure the resistance between power liftgate latch C4339  , harness side and LTM C4174B  , harness side using the following table:
      Power Liftgate Latch Connector-Pin Circuit LTM  Connector-Pin
      C4339-2  CPR64 (VT/OG) C4174B-18 
      C4339-3  CPR65 (BU/GN) C4174B-17 
      C4339-5  CPR66 (GY/YE) C4174B-16 
      Fig 5: Measuring Resistance Between Power Liftgate Latch C4339 And LTM C4174B, Harness Side
      G09298464Courtesy of FORD MOTOR CO.

    Is the resistance less than 3 ohms on all circuits? 

    • Yes  : GO to  A9.
    • No  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the LTM  self-test.
  9. A9 CHECK THE DETENT AND FORKBOLT SWITCH CIRCUITS FOR A SHORT TO GROUND 
    • Measure the resistance between:
      • LTM C4174B-18  , circuit CPR64 (VT/OG), harness side and ground.
      • LTM C4174B-17  , circuit CPR65 (BU/GN), harness side and ground.
      • LTM C4174B-16  , circuit CPR66 (GY/YE), harness side and ground.
        Fig 6: Measuring Resistance Between LTM C4174B, Harness Side And Ground
        G09298462Courtesy of FORD MOTOR CO.

    Are the resistances greater than 10, 000 ohms on all circuits? 

    • Yes  : INSTALL a new power liftgate latch. REFER to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS . CLEAR the DTCs. REPEAT the LTM  self-test.
    • No  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the LTM  self-test.
  10. A10 CHECK THE LIFTGATE POSITION SENSOR (OPT_SEN_1) AND (OPT_SEN_2) PIDs 
    • Ignition ON.
    • Open the liftgate to the full OPEN position.
    • Enter the following diagnostic mode on the scan tool: LTM  DataLogger.
    • Monitor the LTM  PIDs OPT_SEN_1 and OPT_SEN_2 while slowly closing the liftgate.

    Do both of the PID values alternate from ACTIVE to INACTIVE while the liftgate is moving? 

    • Yes  : GO to  A19.
    • No  : GO to  A11.
  11. A11 CHECK FOR VOLTAGE TO THE POSITION SENSOR 
    • Ignition OFF.
    • Disconnect: Power Liftgate Motor C4223  .
    • Ignition ON.
    • Measure the voltage between the power liftgate motor C4223-2  , circuit CPR55 (GN/BU), harness side and the power liftgate motor C4223-3  , circuit RPR55 (WH/BU), harness side.
      Fig 7: Measuring Voltage Between Power Liftgate Motor C4223-2, Circuit CPR55 (GN/BU) And Power Liftgate Motor C4223-3, Circuit RPR55 (WH/BU)
      G07406386Courtesy of FORD MOTOR CO.

    Is the voltage greater than 11 volts? 

    • Yes  : GO to  A15.
    • No  : GO to  A12.
  12. A12 CHECK THE POSITION SENSOR VOLTAGE CIRCUIT 
    • Measure the voltage between power liftgate motor C4223-2  , circuit CPR55 (GN/BU), harness side and ground.
      Fig 8: Measuring Voltage Between Power Liftgate Motor C4223-2, Circuit CPR55 (GN/BU), Harness Side And Ground
      G07406387Courtesy of FORD MOTOR CO.

    Is the voltage approximately 11 volts? 

    • Yes  : GO to  A14.
    • No  : GO to  A13.
  13. A13 CHECK THE POSITION SENSOR VOLTAGE CIRCUIT FOR AN OPEN OR SHORT TO GROUND 
    • Ignition OFF.
    • Disconnect: LTM C4174B  .
    • Measure the resistance between:
      • LTM C4174B-19  , circuit CPR55 (GN/BU), harness side and power liftgate motor C4223-2  , circuit CPR55 (GN/BU), harness side.
      • LTM C4174B-19  , circuit CPR55 (GN/BU), harness side and ground.
        Fig 9: Measuring Resistance Between LTM C4174B-19, Circuit CPR55 (GN/BU) And Power Liftgate Motor C4223-2, Circuit CPR55 (GN/BU), Harness Side
        G08625453Courtesy of FORD MOTOR CO.

    Is the resistance less than 3 ohms between LTM  and power liftgate motor; and greater than 10, 000 ohms between LTM and ground? 

    • Yes  : GO to  A24.
    • No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the LTM  self-test.
  14. A14 CHECK THE POSITION SENSOR RETURN CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Disconnect: LTM C4174B  .
    • Measure the resistance between the LTM C4174B-20  , circuit RPR55 (WH/BU), harness side and the power liftgate motor C4223-3  , circuit RPR55 (WH/BU), harness side.
      Fig 10: Measuring Resistance Between LTM C4174B-19, Circuit CPR55 (GN/BU) And Power Liftgate Motor C4223-2, Circuit CPR55 (GN/BU), Harness Side
      G08625453Courtesy of FORD MOTOR CO.

    Is the resistance less than 3 ohms? 

    • Yes  : GO to  A24.
    • No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the LTM  self-test.
  15. A15 CHECK THE POSITION SENSOR CIRCUITS FOR REFERENCE VOLTAGE 
    • Ignition ON.
    • Measure the voltage between:
      • the power liftgate motor C4223-5  , circuit VPR53 (BU/WH), harness side and ground.
      • the power liftgate motor C4223-6  , circuit VPR54 (BU/BN), harness side and ground.
        Fig 11: Measuring Voltage Between Power Liftgate Motor C4223-5, Circuit VPR53 (BU/WH), Harness Side And Ground
        G07406390Courtesy of FORD MOTOR CO.

    Are the voltages between 4.5 and 5.5 volts? 

    • Yes  : INSTALL a new power liftgate motor. REFER to POWER LIFTGATE MOTOR . CLEAR the DTCs. REPEAT the LTM  self-test.
    • No  : GO to  A16.
  16. A16 CHECK THE POSITION SENSOR CIRCUITS FOR AN OPEN 
    • Ignition OFF.
    • Disconnect: LTM C4174B  .
    • Measure the resistance between the power liftgate motor C4223  , harness side and the LTM C4174B  , harness side using the following chart:
      Power Liftgate Motor Connector-Pin Circuit LTM  Connector-Pin
      C4223-5  VPR53 (BU/WH) C4174B-7 
      C4223-6  VPR54 (BU/BN) C4174B-8 
      Fig 12: Measuring Resistance Between LTM C4174B-19, Circuit CPR55 (GN/BU) And Power Liftgate Motor C4223-2, Circuit CPR55 (GN/BU), Harness Side
      G08625453Courtesy of FORD MOTOR CO.

    Are the resistances less than 3 ohms? 

    • Yes  : GO to  A17.
    • No  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the LTM  self-test.
  17. A17 CHECK THE POSITION SENSOR CIRCUITS FOR A SHORT TO VOLTAGE 
    • Ignition ON.
    • Measure the voltage between:
      • the power liftgate motor C4223-5  , circuit VPR53 (BU/WH), harness side and ground.
      • the power liftgate motor C4223-6  , circuit VPR54 (BU/BN), harness side and ground.
        Fig 13: Measuring Voltage Between Power Liftgate Motor C4223-5, Circuit VPR53 (BU/WH), Harness Side And Ground
        G07406390Courtesy of FORD MOTOR CO.

    Is any voltage present? 

    • Yes  : REPAIR the affectd circuit(s). CLEAR the DTCs. REPEAT the LTM  self-test.
    • No  : GO to  A18.
  18. A18 CHECK THE POSITION SENSOR CIRCUITS FOR A SHORT TO GROUND 
    • Measure the resistance between:
      • the power liftgate motor C4223-5  , circuit VPR53 (BU/WH), harness side and ground.
      • the power liftgate motor C4223-6  , circuit VPR54 (BU/BN), harness side and ground.
        Fig 14: Measuring Resistance Between Power Liftgate Motor C4223-5, Circuit VPR53 (BU/WH), Harness Side And Ground
        G07406393Courtesy of FORD MOTOR CO.

    Are the resistances greater than 10, 000 ohms? 

    • Yes  : GO to  A24.
    • No  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the LTM  self-test.
  19. A19 CHECK THE MOTOR AND LATCH CIRCUITS FOR A SHORT TO VOLTAGE 
    • Ignition ON.
    • Measure the voltage between the LTM C4174A  , harness side and ground as follows:
      LTM  Connector-Pin Circuit
      C4174A-2  CPR61 (BN)
      C4174A-3  CPR62 (WH/BU)
      C4174A-5  CPR57 (GN/WH)
      C4174A-6  CPR58 (GN/OG)
      Fig 15: Measuring Voltage Between LTM C4174A, Harness Side And Ground
      G07406394Courtesy of FORD MOTOR CO.

    Is any voltage present? 

    • Yes  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the LTM  self-test.
    • No  : GO to  A20.
  20. A20 CHECK THE MOTOR AND LATCH CIRCUITS FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Disconnect: LTM C4174A  .
    • Disconnect: Power Liftgate Motor C4223  .
    • Disconnect: Power Liftgate Latch C4339  .
    • Measure the resistance between the LTM C4174A  , harness side and ground as follows:
      LTM  Connector-Pin Circuit
      C4174A-2  CPR61 (BN)
      C4174A-3  CPR62 (WH/BU)
      C4174A-5  CPR57 (GN/WH)
      C4174A-6  CPR58 (GN/OG)
      Fig 16: Measuring Resistance Between LTM C4174A, Harness Side And Ground
      G07406395Courtesy of FORD MOTOR CO.

    Are the resistances greater than 10, 000 ohms? 

    • Yes  : GO to  A21.
    • No  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the LTM  self-test.
  21. A21 CHECK THE MOTOR AND LATCH CIRCUITS FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between the LTM C4174A  , harness side and the power liftgate motor C4223  , harness side, or the power liftgate latch C4339  , harness side using the following chart:
      LTM  Connector-Pin Circuit Power Liftgate Motor Connector-Pin
      C4174A-5  CPR57 (GN/WH) C4223-1 
      C4174A-6  CPR58 (GN/OG) C4223-4 
      C4174A-2  CPR61 (BN) C4339-1 
      C4174A-3  CPR62 (WH/BU) C4339-4 
      Fig 17: Measuring Resistance Between LTM C4174A And Power Liftgate Motor C4223, Harness Side
      G07406396Courtesy of FORD MOTOR CO.

    Are the resistances less than 3 ohms? 

    • Yes  : GO to  A22.
    • No  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the LTM  self-test.
  22. A22 CHECK THE UNLATCH OPERATION 
    • Connect: Power Liftgate Latch C4339  .
    • Close and latch the liftgate.
    • NOTE: Do not apply power and ground to the unlatch actuator circuits for more than a few seconds or damage to the motor may occur.

      Momentarily connect a fused jumper wire between LTM C4174A-3  , circuit CPR62 (WH/BU), harness side and the LTM C4174A-4  , circuit SBB07 (WH/RD), harness side; and connect a fused jumper wire between the LTM C4174A-2  , circuit CPR61 (BN), harness side and the LTM C4174A-1  , circuit GD149 (BK/GY), harness side.

      Fig 18: Connecting Fused Jumper Wire Between LTM C4174A-3, Circuit CPR62 (WH/BU) And LTM C4174A-4, Circuit SBB07 (WH/RD), Harness Side
      G07406397Courtesy of FORD MOTOR CO.

    Does the unlatch/cinching motor activate? 

  23. A23 CHECK THE POWER LIFTGATE MOTOR OPERATION 
    • Connect: Power Liftgate Motor C4223  .
    • Liftgate in the fully closed and unlatched position.
    • NOTE: Do not apply power and ground to the motor actuator circuits for more than a few seconds or damage to the motor may occur.

      Momentarily connect a fused jumper wire between LTM C4174A-5  , circuit CPR57 (GN/WH), harness side and the LTM C4174A-4  , circuit SBB07 (WH/RD), harness side; and connect a fused jumper wire between the LTM C4174A-6  , circuit CPR58 (GN/OG), harness side and the LTM C4174A-1  , circuit GD149 (BK/GY), harness side.

      Fig 19: Connecting Fused Jumper Wire Between LTM C4174A-5, Circuit CPR57 (GN/WH) And LTM C4174A-4, Circuit SBB07 (WH/RD)
      G07406398Courtesy of FORD MOTOR CO.

    Does the power liftgate motor operate? 

    • Yes  : GO to  A24.
    • No  : INSTALL a new power liftgate motor. REFER to POWER LIFTGATE MOTOR . CLEAR the DTCs. REPEAT the LTM  self-test.
  24. A24 CHECK FOR CORRECT LTM OPERATION 
    • Disconnect all the LTM  connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the LTM  connectors and make sure they seat and latch correctly.
    • Make sure the liftgate is fully CLOSED.
    • Connect all previously disconnected connectors and make sure they seat and latch correctly.
    • Operate the system and verify the concern is still present.

    Is the concern still present? 

    • Yes  : INSTALL a new LTM  . REFER to LIFTGATE/TRUNK MODULE (LTM) .
    • No  : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.
scientia non olet · About LEMON Manuals