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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1692 (Handles, Locks, Latches And Entry Systems) >> Diagnostic Tests >> Locks, Latches and Entry Systems >> Pinpoint Tests >> Pinpoint Test E: The Luggage Compartment Lid Release Is Inoperative/Does Not Operate Correctly

Pinpoint Test E: The Luggage Compartment Lid Release Is Inoperative/Does Not Operate Correctly

WARNING: This page is about a different car, the 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Luggage Compartment for schematic and connector information.

Normal Operation 

The battery junction box (BJB) fuse 8 (20A) provides voltage for the power lock/unlock system and to the luggage compartment lid latch (on vehicles without power luggage compartment lid release). The voltage is supplied to the driver door module (DDM) through circuit 1213 (WH/LB). The luggage compartment lid release switch receives voltage from the central junction box (CJB) through circuit 1524 (DB). When the luggage compartment release switch is pressed, voltage is supplied through the switch to the DDM through circuit 26 (WH/VT).

For vehicles not equipped with a power luggage compartment lid, the DDM supplies voltage through circuit 605 (RD) to the luggage compartment release solenoid, releasing the luggage compartment lid. The luggage compartment lid release solenoid is grounded through circuit 57 (BK).

For vehicles equipped with a power luggage compartment lid, the DDM sends a ground signal to the liftgate/trunk module (LTM) on circuit 1237 (LG/RD) to open or close the luggage compartment lid.

The luggage compartment lid release switch is disabled when the perimeter alarm is armed. Once the perimeter alarm is disabled, the luggage compartment lid can be released from the release switch.

This pinpoint test is intended to diagnose the following:

PINPOINT TEST E: THE LUGGAGE COMPARTMENT LID RELEASE IS INOPERATIVE/DOES NOT OPERATE CORRECTLY 

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. E1 CHECK THE LUGGAGE COMPARTMENT LID RELEASE SWITCH INPUT TO THE DDM 
    • Enter the following diagnostic mode on the diagnostic tool: DDM DataLogger
    • Monitor the DDM luggage compartment release switch PID (DLIDRLS) while pressing and releasing the luggage compartment release switch.
    • Does the PID agree with the switch position? 
    1. YES  : If equipped with a power luggage compartment lid, go to  E8.

      If not equipped with a power luggage compartment lid, go to  E11.

    2. NO  : Go to  E2.
  2. E2 CHECK THE DDM DTCs 
    • Refer to the results from the previous DDM self-test.
    • Is DTC B1553 recorded? 
    1. YES  : Go to  E3.
    2. NO  : Go to  E5.
  3. E3 CHECK THE LUGGAGE COMPARTMENT LID RELEASE SWITCH 
    • Disconnect: Luggage Compartment Lid Release Switch C534
    • Enter the following diagnostic mode on the diagnostic tool: DDM Self-Test
    • Is DTC B1553 present? 
    1. YES  : Go to  E4.
    2. NO  : INSTALL a new luggage compartment lid release switch. TEST the system for normal operation.
  4. E4 CHECK CIRCUIT 26 (WH/VT) FOR A SHORT TO VOLTAGE 
    • Key in OFF position.
    • Disconnect: DDM C501a
    • Key in ON position.
      • Fig 1: Checking Circuit For Short To Voltage
      GF0013230Courtesy of FORD MOTOR CO.
    • Measure the voltage between the DDM C501a-12, circuit 26 (WH/VT), harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test
    2. NO  : Go to  E17.
  5. E5 CHECK CIRCUIT 1524 (DB) FOR VOLTAGE 
    • Disconnect: Luggage Compartment Lid Release Switch C534
      • Fig 2: Checking Circuit For Voltage
      GF0013227Courtesy of FORD MOTOR CO.
    • Measure the voltage between the luggage compartment lid release switch C534-1, circuit 1524 (DB), harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  E6.
    2. NO  : VERIFY the CJB fuse 19 (7.5A) is OK. If OK, REPAIR the circuit for an open. TEST the system for normal operation.
  6. E6 CHECK THE LUGGAGE COMPARTMENT LID RELEASE SWITCH 
      Fig 3: Connecting Fused (5A) Jumper Wire
      GF0047527Courtesy of FORD MOTOR CO.
    • Connect a fused (5A) jumper wire between the luggage compartment lid release switch C534-1, circuit 1524 (DB), harness side and the luggage compartment lid release switch C534-2, circuit 26 (WH/VT), harness side.
    • Does the luggage compartment lid release? 
    1. YES  : INSTALL a new luggage compartment lid release switch. TEST the system for normal operation.
    2. NO  : Go to  E7.
  7. E7 CHECK CIRCUIT 26 (WH/VT) FOR AN OPEN OR SHORT TO GROUND 
    • Key in OFF position.
    • Disconnect: DDM C501a
      • Fig 4: Checking Circuit For Open Or Short To Ground
      GF0018630Courtesy of FORD MOTOR CO.
    • Measure the resistance between the DDM C501a-12, circuit 26 (WH/VT), harness side and the luggage compartment lid release switch C534-2, circuit 26 (WH/VT), harness side; and between the DDM C501a-12, circuit 26 (WH/VT), harness side and ground.
    • Is the resistance less than 5 ohms between the DDM and the luggage compartment lid release switch, and greater than 10,000 ohms between the DDM and ground? 
    1. YES  : Go to  E17.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  8. E8 CHECK THE LUGGAGE COMPARTMENT LID RELEASE SWITCH INPUT TO THE LTM 
    • Enter the following diagnostic mode on the diagnostic tool: LTM DataLogger
    • Monitor the LTM luggage compartment release input PID (DECKLIDSW) while pressing and releasing the luggage compartment release switch.
    • Does the PID agree with the switch position? 
    1. YES  : REFER to BODY CLOSURES article to continue diagnosis of the inoperative power luggage compartment lid.
    2. NO  : Go to  E9.
  9. E9 CHECK THE LUGGAGE COMPARTMENT LID RELEASE SWITCH OUTPUT FROM THE DDM 
    • Key in OFF position.
    • Disconnect: DDM C501b
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: LTM DataLogger
      • Fig 5: Connecting Fused (5A) Jumper Wire
      GF0047528Courtesy of FORD MOTOR CO.
    • Monitor the LTM luggage compartment release input PID (DECKLIDSW) while momentarily connecting a fused (5A) jumper wire between the DDM C501b-21, circuit 1237 (LG/RD), harness side and ground.
    • Does the PID change when the jumper wire is connected? 
    1. YES  : Go to  E17.
    2. NO  : Go to  E10.
  10. E10 CHECK CIRCUIT 1237 (LG/RD) FOR AN OPEN OR SHORT TO GROUND 
    • Key in OFF position.
    • Disconnect: LTM C4081c
      • Fig 6: Measuring Resistance
      GF0047529Courtesy of FORD MOTOR CO.
    • Measure the resistance between the DDM C501b-21, circuit 1237 (LG/RD), harness side and the LTM C4081a-10, circuit 1237 (LG/RD), harness side; and between the DDM C501b-21, circuit 1237 (LG/RD), harness side and ground.
    • Is the resistance less than 5 ohms between the DDM and the LTM, and greater than 10,000 ohms between the DDM and ground? 
    1. YES  : Go to  E16.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  11. E11 CHECK CIRCUIT 57 (BK) FOR AN OPEN 
    • Disconnect: Negative Battery Cable
    • Disconnect: Luggage Compartment Lid Latch C430
      • Fig 7: Measuring Resistance
      GF0047530Courtesy of FORD MOTOR CO.
    • Measure the resistance between the luggage compartment lid release solenoid C430-3, circuit 57 (BK), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : CONNECT the negative battery cable. Go to  E12.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  12. E12 CHECK FOR A SHORT TO VOLTAGE TO THE LUGGAGE COMPARTMENT LID LATCH 
    • Key in ON position.
      • Fig 8: Measuring Voltage
      GF0047531Courtesy of FORD MOTOR CO.
    • Measure the voltage between the luggage compartment lid latch C430-2, circuit 605 (RD), harness side and ground.
    • Is any voltage present? 
    1. YES  : Go to  E13.
    2. NO  : Go to  E14.
  13. E13 CHECK CIRCUIT 605 (RD) FOR A SHORT TO VOLTAGE 
    • Key in OFF position.
    • Disconnect: DDM C501b
    • Key in ON position.
      • Fig 9: Measuring Voltage
      GF0047531Courtesy of FORD MOTOR CO.
    • Measure the voltage between the luggage compartment lid latch C430-2, circuit 605 (RD), harness side and ground.
    • Is any voltage present? 
    1. YES  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to  E17.
  14. E14 CHECK FOR VOLTAGE TO THE LUGGAGE COMPARTMENT LID LATCH 
    • Key in OFF position.
    • Unlock the doors with the door lock control switch.
      • Fig 10: Measuring Voltage
      GF0047531Courtesy of FORD MOTOR CO.
      NOTE: The DDM only supplies voltage to the luggage compartment lid latch momentarily. It is important to monitor the meter while pressing the luggage compartment lid release switch.
    • While pressing the luggage compartment lid release switch, measure the voltage between the luggage compartment lid latch C430-2, circuit 605 (RD), harness side and ground.
    • Is the voltage momentarily greater than 10 volts? 
    1. YES  : INSTALL a new luggage compartment lid latch. REFER to Luggage Compartment Lid Latch . TEST the system for normal operation.
    2. NO  : Go to  E15.
  15. E15 CHECK CIRCUIT 605 (RD) FOR AN OPEN OR SHORT TO GROUND 
    • Disconnect: DDM C501b
      • Fig 11: Measuring Resistance
      GF0047532Courtesy of FORD MOTOR CO.
    • Measure the resistance between the luggage compartment lid latch C430-2, circuit 605 (RD), harness side and the DDM C501b-12, circuit 605 (RD), harness side; and between the luggage compartment lid latch C430-2, circuit 605 (RD), harness side and ground.
    • Is the resistance less than 5 ohms between the DDM and luggage compartment lid latch and greater than 10,000 ohms between the DDM and ground? 
    1. YES  : Go to  E17.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  16. E16 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 correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new LTM. REFER to BODY CLOSURES article. TEST the system for normal operation.
    2. NO  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
  17. E17 CHECK FOR CORRECT DDM OPERATION 
    • Disconnect all the DDM connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the DDM connectors and make sure they seat correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new DDM. REFER to MULTIFUNCTION ELECTRONIC MODULES article. TEST the system for normal operation.
    2. NO  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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