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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 736 (Handles, Locks, Latches And Entry Systems) >> Diagnostic Tests >> Locks, Latches and Entry Systems >> Pinpoint Tests >> Pinpoint Test F: The Door Locks Operate Only One Way >> Pinpoint Test F: The Door Locks Operate Only One Way

Pinpoint Test F: The Door Locks Operate Only One Way

WARNING: This page is about a different car, the 2007 Lincoln Mark LT and 2007 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. F1 RETRIEVE THE RECORDED VSM DTCs FROM THE ON-DEMAND SELF-TEST 
    • Check for recorded VSM DTCs from the on-demand self-test.
    • Are any DTCs recorded? 
    1. YES  : For DTC B1309 or B1341, go to  F2 .

      For all other VSM DTCs, REFER to Vehicle Security Module (VSM) Diagnostic Trouble Code (DTC) Index in this article.

    2. NO  : Go to  F3 .
  2. F2 RERUN THE VSM ON-DEMAND SELF-TEST 
    • Key in OFF position.
    • Disconnect: Suspect Door Lock Control Switch
    • Key in ON position.
    • Erase the DTCs, then rerun the VSM on-demand self-test.
    • Is DTC B1309 or B1341 recorded? 
    1. YES  : Go to  F5.
    2. NO  : INSTALL a new door lock control switch for the switch in question. REFER to Door Lock Control Switch  in this article. CLEAR the DTCs. REPEAT the self-test.
  3. F3 CHECK CIRCUITS 119 (PK/YE) AND 120 (PK/LG) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Suspect Door Lock Control Switch
    • Disconnect: VSM C3008b
    • Measure the resistance between the suspect door lock control switch C505-2 (driver) or C605-2 (passenger), circuit 119 (PK/YE), harness side and the VSM C3008b-9, circuit 119 (PK/YE), harness side; and between the suspect door lock control switch C505-6 (driver) or C605-6 (passenger), circuit 120 (PK/LG), harness side and the VSM C3008b-1, circuit 120 (PK/LG), harness side.
      Fig 1: Checking Circuits 119 (PK/YE) And 120 (PK/LG) For Open
      GF0002044Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  F4.
    2. NO  : REPAIR the circuit in question. TEST the system for normal operation.
  4. F4 CHECK CIRCUIT 119 (PK/YE) AND CIRCUIT 120 (PK/LG) FOR A SHORT TO VOLTAGE 
    • Key in ON position.
    • Measure the voltage between the suspect door lock control switch C505-2 (driver) or C605-2 (passenger), circuit 119 (PK/YE), harness side and ground; and between the suspect door lock control switch C505-6 (driver) or C605-6 (passenger), circuit 120 (PK/LG), harness side and ground.
      Fig 2: Checking Circuits 119 (PK/YE) And 120 (PK/LG) For Short To Voltage
      GF0002045Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : REPAIR the circuit in question. TEST the system for normal operation.
    2. NO  : Go to  F6.
  5. F5 CHECK CIRCUIT 119 (PK/YE) AND CIRCUIT 120 (PK/LG) FOR SHORT TO GROUND 
    • Measure the resistance between the suspect door lock control switch C505-2 (driver) or C605-2 (passenger), circuit 119 (PK/YE), harness side and ground; and between the suspect door lock control switch C505-6 (driver) or C605-6 (passenger), circuit 120 (PK/LG), harness side and ground.
      Fig 3: Checking Circuits 119 (PK/YE) And 120 (PK/LG) For Short To Ground
      GF0002046Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 
    1. YES  : Go to  F7.
    2. NO  : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
  6. F6 CHECK THE SUSPECT DOOR LOCK CONTROL SWITCH 
    • Carry out the door lock control switch component test for the suspect door lock control switch. Refer to COMPONENT TESTING.
    • Is the suspect door lock control switch OK? 
    1. YES  : Go to  F7.
    2. NO  : INSTALL a new door lock control switch as necessary. REFER to Door Lock Control Switch  in this article. TEST the system for normal operation.
  7. F7 CHECK FOR CORRECT VSM OPERATION 
    • Disconnect all the VSM connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the VSM 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 VSM. REFER to MULTIFUNCTION ELECTRONIC MODULES article. CLEAR the DTCs. REPEAT the self-test.
    2. 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.
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