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Home >> Ford >> 2013 >> Escape Titanium, AWD >> Repair and Diagnosis (Single Page) >> Body & Frame >> Exterior Body Panels >> Body Panel System - Body Closures >> Diagnosis And Testing >> Power Liftgate >> Pinpoint Tests >> Pinpoint Test J: DTC B1451:11, B1451:15, B1453:11 >> Pinpoint Test J: DTC B1451:11, B1451:15, B1453:15

Pinpoint Test J: DTC B1451:11, B1451:15, B1453:15

  1. J1 CHECK THE LTM LATCH FORKBOLT SWITCH INPUTS 
    • Ignition OFF.
    • Disconnect: LTM C4174B.
    • Open the liftgate. If necessary, refer to Liftgate Latch Manual Release .
    • Measure the resistance  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C4174B-16 CPR65 (BU/GN) C4174B-15 RPR82 (WH/GN)
      C4174B-5 CPR64 (VT/OG) C4174B-15 RPR82 (WH/GN)
      Fig 1: Identifying LTM (C4174B) Connector Terminals
      G08618252Courtesy of FORD MOTOR CO.
    • Record the test results.
    • Using a suitable tool, such as a screwdriver, latch the liftgate latch to the secondary latch position (first audible click).
    • Measure the resistance  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C4174B-16 CPR65 (BU/GN) C4174B-15 RPR82 (WH/GN)
      C4174B-5 CPR64 (VT/OG) C4174B-15 RPR82 (WH/GN)
      Fig 2: Identifying LTM (C4174B) Connector Terminals
      G08618253Courtesy of FORD MOTOR CO.
    • Record the test results.
    • Using a suitable tool, such as a screwdriver, latch the liftgate latch to the primary latch position (second audible click).
    • Measure the resistance  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C4174B-16 CPR65 (BU/GN) C4174B-15 RPR82 (WH/GN)
      C4174B-5 CPR64 (VT/OG) C4174B-15 RPR82 (WH/GN)
      Fig 3: Identifying LTM (C4174B) Connector Terminals
      G08618254Courtesy of FORD MOTOR CO.
    • Record the test results.
    • Compare the results with the table below.
      Circuit Resistance With Liftgate Latch Fully Unlatched Resistance With Liftgate Latch in Secondary Latch Position Resistance With Liftgate Latch in Primary Latch Position (Fully Latched)
      CPR65 (BU/GN) Less than 5 ohms Less than 5 ohms Greater than 10, 000 ohms
      CPR64 (VT/OG) Less than 5 ohms Greater than 10, 000 ohms Greater than 10, 000 ohms
    • Do all of the resistance values agree with the table? 
    • Yes  : GO to  J6.
    • No  : If none of the values agree, GO to J2.

      If one or more of the values agree, GO to  J3.

  2. J2 CHECK THE LTM LATCH FORKBOLT SWITCH RETURN CIRCUIT FOR AN OPEN 
    • Disconnect: Power Liftgate Latch C4339.
    • Measure the resistance  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C4339-8 RPR82 (WH/GN) C4174B-15 RPR82 (WH/GN)
      Fig 4: Checking LTM Latch Forkbolt Switch Return Circuit For Open
      G08618255Courtesy of FORD MOTOR CO.
    • Is the resistance less than 3 ohms? 
  3. J3 CHECK THE LTM LATCH FORKBOLT SWITCH INPUT CIRCUITS FOR A SHORT TO GROUND 
    • Disconnect: Power Liftgate Latch C4339.
    • Measure the resistance  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C4174B-16 CPR65 (BU/GN) - Ground
      C4174B-5 CPR64 (VT/OG) - Ground
      Fig 5: Identifying LTM (C4174B) Connector Terminals
      G08618256Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10, 000 ohms? 
    • Yes  : GO to J4.
    • No  : REPAIR the circuit in question.
  4. J4 CHECK THE LTM LATCH FORKBOLT SWITCH INPUT CIRCUITS FOR AN OPEN 
    • Measure the resistance  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C4339-3 CPR65 (BU/GN) C4174B-16 CPR65 (BU/GN)
      C4339-2 CPR64 (VT/OG) C4174B-5 CPR64 (VT/OG)
      Fig 6: Checking LTM Latch Forkbolt Switch Input Circuits For Open
      G08618255Courtesy of FORD MOTOR CO.
    • Are the resistances less than 3 ohms? 
    • Yes  : GO to J5.
    • No  : REPAIR the circuit in question.
  5. J5 CHECK THE LTM LATCH FORKBOLT SWITCH INPUT CIRCUITS FOR A SHORT TOGETHER 
    • Measure the resistance  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C4174B-16 CPR65 (BU/GN) C4174B-5 CPR64 (VT/OG)
      C4174B-16 CPR65 (BU/GN) C4174B-15 RPR82 (WH/GN)
      C4174B-5 CPR64 (VT/OG) C4174B-15 RPR82 (WH/GN)
      Fig 7: Identifying LTM (C4174B) Connector Terminals
      G08618258Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10, 000 ohms? 
    • Yes  : INSTALL a new power liftgate latch. REFER to LIFTGATE LATCH -- POWER .
    • No  : REPAIR the circuits in question.
  6. J6 CHECK THE DETENT AND SECTOR GEAR SWITCH INPUT CIRCUITS FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Disconnect: Power Liftgate Latch C4339.
    • Disconnect: LTM C4174B.
    • Measure the resistance  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C4174B-4 CPR66 (GY/BU) - Ground
      C4174B-11 CPR67 (VT) - Ground
      C4174B-3 CPR68 (YE) - Ground
      Fig 8: Identifying LTM (C4174B) Connector Terminals
      G08618259Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10, 000 ohms? 
    • Yes  : GO to J7.
    • No  : REPAIR the circuit in question.
  7. J7 CHECK THE DETENT AND SECTOR GEAR SWITCH INPUT CIRCUITS FOR A SHORT TO THE RETURN CIRCUIT 
    • Measure the resistance  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C4174B-4 CPR66 (GY/BU) C4174B-15 RPR82 (WH/GN)
      C4174B-11 CPR67 (VT) C4174B-15 RPR82 (WH/GN)
      C4174B-3 CPR68 (YE) C4174B-15 RPR82 (WH/GN)
      Fig 9: Identifying LTM (C4174B) Connector Terminals
      G08618260Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10, 000 ohms? 
    • Yes  : GO to J8.
    • No  : REPAIR the circuits in question.
  8. J8 CHECK THE DETENT AND SECTOR GEAR SWITCH INPUT CIRCUITS FOR AN OPEN 
    • Disconnect: Power Liftgate Latch C4339.
    • Measure the resistance  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C4339-5 CPR66 (GY/BU) C4174B-4 CPR66 (GY/BU)
      C4339-6 CPR67 (VT) C4174B-11 CPR67 (VT)
      C4339-7 CPR68 (YE) C4174B-3 CPR68 (YE)
      Fig 10: Checking LTM Latch Forkbolt Switch Return Circuit For Open
      G08618255Courtesy of FORD MOTOR CO.
    • Are the resistances less than 3 ohms? 
    • Yes  : INSTALL a new power liftgate latch. REFER to LIFTGATE LATCH -- POWER . TEST the system for normal operation. If the concern is still present, GO to J9.
    • No  : REPAIR the circuit in question.
  9. J9 CHECK FOR CORRECT LTM OPERATION 
    • Disconnect and inspect all LTM 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 LTM 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 LTM. REFER to LIFTGATE/TRUNK MODULE (LTM) .
    • 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.
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