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Home >> Lincoln >> 2010 >> MKZ AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1002 (Handles, Locks, Latches And Entry Systems) >> Diagnostic Tests >> Locks, Latches and Entry Systems >> Pinpoint Tests >> Pinpoint Test A: All Door Locks Are Inoperative >> Pinpoint Test A: All Door Locks Are Inoperative

Pinpoint Test A: All Door Locks Are Inoperative

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to BATTERY, MOUNTING AND CABLES article.
  1. A1 CHECK THE RECORDED SJB DTCs FROM THE SELF-TEST 
    • Check the recorded results from the SJB self-test.
    • Is DTC B2A25 present? 
    1. YES  : Go to Pinpoint Test E .
    2. NO  : Go to  A2.
  2. A2 VERIFY THE OPERATION OF BOTH DOOR LOCK CONTROL SWITCHES 
    • Press the lock and unlock button on both door lock control switches while observing the door lock operation.
    • Are the door locks inoperative from both switches? 
    1. YES  : Go to  A3.
    2. NO  : Go to Pinpoint Test D .
  3. A3 VERIFY ALL DOOR LOCKS ARE INOPERATIVE 
    • Press the lock and unlock buttons from a door lock control switch while observing the door locks.
    • Are all the door locks inoperative from both switch positions (lock and unlock)? 
    1. YES  : VERIFY the SJB fuse 17 (20A) is OK. If OK, go to  A4. If not OK, go to  A6.
    2. NO  : Go to Symptom Chart .
  4. A4 CHECK CIRCUIT GD182 (BK/GY) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Negative Battery Cable
    • Disconnect: SJB C2280d
    • Measure the resistance between the SJB C2280d-7, circuit GD182 (BK/GY), harness side and ground.
      • Fig 1: Checking Circuit For Open
      GF0021678Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  A5.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  5. A5 CHECK CIRCUIT CPL11 (GY/BN) FOR AN OPEN 
    • Disconnect: LH Front Door Lock Actuator C525
    • Measure the resistance between the SJB C2280d-6, circuit CPL11 (GY/BN), harness side and the LH front door lock actuator C525-4, circuit CPL11 (GY/BN), harness side.
      • Fig 2: Measuring Resistance Between SJB C2280D-6, Circuit CPL11 (GY/BN) & LH Front Door Lock Actuator C525-4
      GF0031007Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  A9.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  6. A6 CHECK CIRCUIT CPL59 (BN/BU) FOR A SHORT TO GROUND 
    • Install a new SJB fuse 17 (20A).
    • Operate the liftgate window release by pressing the liftgate window release switch.
    • Is the SJB fuse 17 (20A) OK? 
    1. YES  : Go to  A8.
    2. NO  : Go to  A7.
  7. A7 CHECK THE LIFTGATE GLASS ACTUATOR FOR A SHORT 
    • Disconnect: Liftgate Glass Latch C479
    • Install a new SJB fuse 17 (20A).
    • Operate the liftgate window release by pressing the liftgate window release switch.
    • Is the SJB fuse 17 (20A) OK? 
    1. YES  : INSTALL a new liftgate window latch. REFER to Liftgate Window Latch . TEST the system for normal operation.
    2. NO  : REPAIR circuit CPL59 (BN/BU) for a short to ground. TEST the system for normal operation.
  8. A8 CHECK CIRCUIT CPL11 (GY/BN) FOR A SHORT TO GROUND 
    • Operate the door lock actuators by pressing LOCK on the door lock control switch.
    • Is the SJB fuse 17 (20A) OK? 
    1. YES  : REPAIR circuit CPL51 (BU/GN) or CPL52 (VT/GY) for a short to ground. TEST the system for normal operation.
    2. NO  : REPAIR circuit CPL11 (GY/BN) for a short to ground. TEST the system for normal operation.
  9. A9 CHECK FOR CORRECT SJB OPERATION 
    • Disconnect all the SJB connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the SJB 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 SJB. 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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