Pinpoint Test B: The Luggage Compartment Lid Is Inoperative - Without Police Package

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.

B1 CHECK THE LUGGAGE COMPARTMENT LID RELEASE SWITCH FOR CORRECT OPERATION
- Measure the resistance between the luggage compartment lid release switch C534-1, circuit 1523 (DG), component side and luggage compartment lid release switch C534-2, circuit 26 (WH/VT), component side while pressing and releasing the luggage compartment lid release switch.
  
  Fig 1: Checking The Luggage Compartment Lid Release Switch For Correct Operation
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms with the luggage compartment lid release switch released, and less than 5 ohms with the luggage compartment lid release switch pressed?
Yes : GO to B2.

No : INSTALL a new luggage compartment lid release switch. CLEAR the DTCs. REPEAT the self-test.
B2 CHECK THE DDM DIAGNOSTIC TROUBLE CODES (DTCs)
- Refer to the results from the previous DDM self-test.
- Is DTC B1553 recorded?
Yes : GO to B3.

No : GO to B4.
B3 CHECK CIRCUIT 26 (WH/VT) FOR A SHORT TO VOLTAGE.
- Measure the voltage between the DDM C501a-12, circuit 26 (WH/VT), harness side and ground.
  
  Fig 2: Checking Circuit 26 (WH/VT) For A Short To Voltage
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : REPAIR the circuit. TEST the system for normal operation.

No : GO to B9.
B4 CHECK CIRCUIT 1523 (DG) FOR VOLTAGE
- Disconnect: Luggage Compartment Lid Release Switch C534.
- Measure the voltage between the luggage compartment lid release switch C534-1, circuit 1523 (DG), harness side and ground.
  
  Fig 3: Checking Circuit 1523 (DG) For Voltage
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : GO to B5.

No : REPAIR the circuit. TEST the system for normal operation.
B5 CHECK CIRCUIT 26 (WH/VT) FOR AN OPEN OR A SHORT TO GROUND
- Disconnect: DDM C501a.
- 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 DDM C501a-12, circuit 26 (WH/VT), harness side and ground.
  
  Fig 4: Checking Circuit 26 (WH/VT) For An Open Or A Short To Ground
  Courtesy of FORD MOTOR CO.
- 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?
Yes : GO to B6.

No : REPAIR the circuit. TEST the system for normal operation.
B6 CHECK THE LUGGAGE COMPARTMENT LID RELEASE SOLENOID CIRCUITRY
- Momentarily connect a fused (10A) jumper wire between the positive battery post and the DDM C501b-12, circuit 84 (VT/YE), harness side.
  
  Fig 5: Checking The Luggage Compartment Lid Release Solenoid Circuitry
  Courtesy of FORD MOTOR CO.
- Does the luggage compartment lid open?
Yes : GO to B9.

No : GO to B7.
B7 CHECK CIRCUIT 84 (VT/YE) FOR AN OPEN
- Disconnect: Luggage Compartment Lid Release Solenoid C430.
- Measure the resistance between the DDM C501b-12, circuit 84 (VT/YE), harness side and the luggage compartment lid release solenoid C430-2, circuit 84 (VT/YE), harness side.
  
  Fig 6: Checking Circuit 84 (VT/YE) For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to B8.

No : REPAIR the circuit. TEST the system for normal operation.
B8 CHECK CIRCUIT 57 (BK) FOR AN OPEN
- Measure the resistance between the luggage compartment lid release solenoid C430-3, circuit 57 (BK), harness side and ground.
  
  Fig 7: Checking Circuit 57 (BK) For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : INSTALL a new luggage compartment lid latch. REFER to LUGGAGE COMPARTMENT LID LATCH . TEST the system for normal operation.

No : REPAIR the circuit. TEST the system for normal operation.
B9 CHECK THE DDM FOR CORRECT OPERATION
- Disconnect all DDM connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all DDM connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes : INSTALL a new DDM. REFER to MULTIFUNCTION ELECTRONIC MODULES . PROGRAM all the remote keyless entry (RKE) transmitters. REFER to REMOTE KEYLESS ENTRY TRANSMITTER PROGRAMMING . CLEAR the DTCs. REPEAT the self-test.

No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.