LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 2023 (Body Panel System - Body Closures) >> Diagnosis And Testing >> Power Liftgate >> Pinpoint Tests >> Pinpoint Test E: The Power Liftgate Chime is Inoperative >> Pinpoint Test E: The Power Liftgate Chime Is Inoperative

Pinpoint Test E: The Power Liftgate Chime Is Inoperative

WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 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. E1 CHECK FOR VOLTAGE TO THE POWER LIFTGATE CHIME 
    • Ignition ON.
    • Set the parking brake to the ON position.
    • Open the liftgate.
      • NOTE: The LTM  applies voltage to the power liftgate chime for one second after the rear power liftgate switch is pressed, when the transmission is not in the PARK position and the liftgate is in the OPEN position.
    • With the power liftgate chime still connected, press the rear power liftgate switch and measure the voltage between power liftgate chime C4186-1, circuit CPR56 (VT/BN), back probe and power liftgate chime C4186-2, circuit RPR56 (GY/VT), back probe.
      Fig 1: Checking Voltage To Power Liftgate Chime
      G06070747Courtesy of FORD MOTOR CO.
    • Is any AC voltage present? 
    • Yes:  INSTALL a new power liftgate motor. REFER to POWER LIFTGATE MOTOR . CLEAR the DTCs. REPEAT the LTM  self-test.
    • No:  GO to E2  .
  2. E2 CHECK THE POWER LIFTGATE CHIME CIRCUITS FOR AN OPEN 
    • Ignition OFF.
    • Disconnect: Power Liftgate Chime C4186.
    • Disconnect: LTM  C4174B.
    • Measure the resistance between LTM  C4174B, harness side and power liftgate chime C4186, harness side using the following chart:
      POWER LIFTGATE CHIME REFERENCE CHART

      LTM  Circuit Power Liftgate Chime
      C4174B-9 CPR56 (VT/BN) C4186-1
      C4174B-22 RPR56 (GY/VT) C4186-2
      Fig 2: Measuring Resistance Between LTM C4174B And Power Liftgate Chime C4186, Harness Side
      G06070748Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    • Yes:  GO to E3  .
    • No:  REPAIR the circuit. CLEAR the DTCs. REPEAT the LTM  self-test.
  3. E3 CHECK THE POWER LIFTGATE CHIME CIRCUITS FOR A SHORT TO GROUND 
    • Measure the resistance between power liftgate chime C4186-1, circuit CPR56 (VT/BN), harness side and ground; then between power liftgate chime C4186-2, circuit RPR56 (GY/VT), harness side and ground.
      Fig 3: Checking Power Liftgate Chime Circuits For Short To Ground
      G06070749Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 
    • Yes:  GO to E4  .
    • No:  REPAIR the circuit. CLEAR the DTCs. REPEAT the LTM  self-test.
  4. E4 CHECK THE POWER LIFTGATE CHIME CIRCUITS FOR A SHORT TO VOLTAGE 
    • Measure the voltage between power liftgate chime C4186-1, circuit CPR56 (VT/BN), harness side and ground; then between power liftgate chime C4186-2, circuit RPR56 (GY/VT), harness side and ground.
      Fig 4: Checking Power Liftgate Chime Circuits For Short To Voltage
      G06070750Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes:  REPAIR the circuit. CLEAR the DTCs. REPEAT the LTM  self-test.
    • No:  GO to E5  .
  5. E5 CHECK FOR CORRECT LTM OPERATION 
    • Disconnect all the LTM  connectors.
    • Check for:
      • corrosion.
      • pushed-out pins.
    • Connect all the LTM  connectors and make sure they are seated correctly.
    • Make sure the liftgate is fully CLOSED.
    • 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) . REPEAT the LTM  self-test.
    • No:  The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the LTM  self-test.
scientia non olet · About LEMON Manuals