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Home >> Mercury >> 2009 >> Mariner Base, 2.5 7, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 50 (Handles, Locks, Latches & 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 2009 Ford Mustang. 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. A1 RETRIEVE THE RECORDED DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND SJB SELF-TESTS 
    • Check for recorded SJB DTCs from the continuous and on-demand self-tests.
    • Are any DTCs recorded? 
    1. YES  : For DTC B1301, go to  A3.

      For DTCs B1300, B1310 and B1982, go to Pinpoint Test F .

      For all other DTCs, REFER to DTC Charts .

    2. NO  : Go to  A2.
  2. A2 VERIFY THE OPERATION OF THE LEFT AND RIGHT DOOR LOCK CONTROL SWITCHES 
    • Press the lock and unlock button of both the left and the right 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 CHECK CIRCUIT 1205 (BK) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: SJB C2280a
      • Fig 1: Measuring Resistance Between SJB C2280A-1 Harness Side And Ground
      GF0014840Courtesy of FORD MOTOR CO.
    • Measure the resistance between the SJB C2280a-1, circuit 1205 (BK), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  A4.
    2. NO  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  4. A4 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 . 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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