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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 B: A Single Door Lock is Inoperative >> Pinpoint Test B: A Single Door Lock Is Inoperative

Pinpoint Test B: A Single Door Lock Is 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. B1 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 DTCs B1300, B1310 and B1982, go to Pinpoint Test F .

      For all other DTCs, REFER to DTC Charts .

    2. NO  : Go to  B2.
  2. B2 CHECK THE DOOR LATCH FOR BINDING 
    • LOCK and UNLOCK the inoperative door lock using the door lock rod.
    • Does the door LOCK and UNLOCK? 
    1. YES  : Go to  B3.
    2. NO  : INSTALL a new door latch. REFER to Door Latch .
  3. B3 CHECK CIRCUITS 1328 (RD/OG) AND 1383 (RD) FOR VOLTAGE 
    • Key in OFF position.
    • Disconnect: Inoperative Door Lock Actuator
      • Fig 1: Checking Circuits 1328 (RD/OG) & 1383 (RD) For Voltage
      GF0046234Courtesy of FORD MOTOR CO.
      NOTE: The SJB only supplies voltage to the actuator momentarily. It is important to monitor the meter while pressing the door lock control switch.
    • While pressing the door lock control switch in the LOCK position, measure the voltage between the LH door lock actuator C525-1, circuit 1328 (RD/OG), harness side and ground; or between the RH door lock actuator C603-1, circuit 1383 (RD), harness side and ground.
    • Is the voltage momentarily greater than 10 volts? 
    1. YES  : Go to  B4.
    2. NO  : Go to  B5.
  4. B4 CHECK CIRCUITS 1329 (YE) AND 1384 (LB) FOR VOLTAGE 
      Fig 2: Checking Circuits 1329 (YE) & 1384 (LB) For Voltage
      GF0046235Courtesy of FORD MOTOR CO.
      NOTE: The SJB only supplies voltage to the actuator momentarily. It is important to monitor the meter while pressing the door lock control switch.
    • While pressing the door lock control switch in the UNLOCK position, measure the voltage between the LH door lock actuator C525-2, circuit 1329 (YE), harness side and ground; or between the RH door lock actuator C603-2, circuit 1384 (LB), harness side and ground.
    • Is the voltage momentarily greater than 10 volts? 
    1. YES  : INSTALL a new door lock actuator. REFER to Door Lock Actuator . TEST the system for normal operation.
    2. NO  : Go to  B5.
  5. B5 CHECK THE DOOR LOCK ACTUATOR CIRCUITS FOR AN OPEN 
    • Disconnect: SJB C2280g (LH door inoperative)
    • Disconnect: SJB C2280h (RH door inoperative)
    • Measure the resistance between inoperative door lock actuator harness side and the SJB, harness side as follows:
      Door Lock Actuator Connector-Pin SJB Connector-Pin Circuit
      LH C525-1 C2280g-3 1328 (RD/OG)
      LH C525-2 C2280g-1 1329 (YE)
      RH C603-1 C2280h-27 1383 (RD)
      RH C603-2 C2280h-14 1384 (LB)
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  B6.
    2. NO  : REPAIR the circuit in question. TEST the system for normal operation.
  6. B6 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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