LEMON Manuals: Even more car manuals for everyone
Home >> Audi >> 2018 >> A6 Premium Plus >> Repair and Diagnosis >> External Pages >> Different car >> Section 261 (Handles, Locks, Latches And Entry Systems) >> Diagnosis And Testing >> Handles, Locks, Latches and Entry Systems - With Intelligent Access (IA) >> Pinpoint Tests >> Pinpoint Test AF : The Door Locks Operate Only One Way >> Pinpoint Test AF : The Door Locks Operate Only One Way

Pinpoint Test AF : The Door Locks Operate Only One Way

WARNING: This page is about a different car, the 2016 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

  1. AF1 CHECK FOR BCM DTC B126A:01

    • Ignition ON.
    • Using a diagnostic scan tool, carry out the BCM self-test.

    Is DTC B126A:01 present? 

    Yes  GO to  AF2.
    No  GO to  AF5.

  2. AF2 CHECK THE LEFT DOOR LOCK CONTROL SWITCH

    • Ignition OFF.
    • Disconnect: Left Door Lock Control Switch C507 .
    • Ignition ON.
    • Using a diagnostic scan tool, clear the BCM DTCs.
    • Using a diagnostic scan tool, carry out the BCM self-test.

    Is DTC B126A:01 still present? 

    Yes  GO to  AF3.
    No  INSTALL a new left door lock control switch.

  3. AF3 CHECK THE RIGHT DOOR LOCK CONTROL SWITCH

    • Ignition OFF.
    • Disconnect: Right Door Lock Control Switch C605 .
    • Ignition ON.
    • Using a diagnostic scan tool, clear the BCM DTCs.
    • Using a diagnostic scan tool, carry out the BCM self-test.

    Is DTC B126A:01 still present? 

    Yes  GO to  AF4.
    No  INSTALL a new right door lock control switch.

  4. AF4 CHECK THE LOCK INPUT CIRCUIT AND THE UNLOCK INPUT CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C507-1
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground
      C507-3
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  AF9.
    No  REPAIR the circuit in question.

  5. AF5 VERIFY THE OPERATION OF BOTH DOOR LOCK CONTROL SWITCHES

    • Ignition OFF.
    • Press the lock and unlock buttons of both door lock control switches while observing the door lock operation.

    Do the door locks operate only one way from both switches? 

    Yes  GO to  AF8.
    No  GO to  AF6.

  6. AF6 CHECK THE LOCK INPUT CIRCUIT FOR AN OPEN (SINGLE SWITCH INOPERATIVE)

    • Disconnect: Suspect Door Lock Control Switch.
    • Unlock the doors from the working door lock control switch.
    • For the left door lock control switch, connect:
      Lead 1 Measurement / Action Lead 2
      C507-1
      GFD135987Courtesy of FORD MOTOR COMPANY
      		 C507-4
    • For the right door lock control switch, connect:
      Lead 1 Measurement / Action Lead 2
      C605-1
      GFD135987Courtesy of FORD MOTOR COMPANY
      		 C605-4
    • Remove the fused jumper wire.

    Do the doors lock when the fuse jumper wire is connected? 

    Yes  GO to  AF7.
    No  REPAIR the circuit.

  7. AF7 CHECK THE UNLOCK INPUT CIRCUIT FOR AN OPEN (SINGLE SWITCH INOPERATIVE)

    • Lock the doors from the working door lock control switch.
    • For the left door lock control switch, connect:
      Lead 1 Measurement / Action Lead 2
      C507-3
      GFD135987Courtesy of FORD MOTOR COMPANY
      		 C507-4
    • For the right door lock control switch, connect:
      Lead 1 Measurement / Action Lead 2
      C605-3
      GFD135987Courtesy of FORD MOTOR COMPANY
      		 C605-4
    • Remove the fused jumper wire.

    Do the doors unlock when the fused jumper wire is connected? 

    Yes  INSTALL a new door lock control switch.
    No  REPAIR the circuit.

  8. AF8 CHECK THE LOCK OR UNLOCK INPUT CIRCUIT FOR AN OPEN (BOTH SWITCHES INOPERATIVE)

    • Disconnect: Right Door Lock Control Switch C605 .
    • If the doors do not lock, measure:
      Positive Lead Measurement / Action Negative Lead
      C2280C-6
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C605-1
    • If the doors do not unlock, measure:
      Positive Lead Measurement / Action Negative Lead
      C2280C-8
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C605-3

    Is the resistance less than 5 ohms? 

    Yes  GO to  AF9.
    No  REPAIR the circuit.

  9. AF9 CHECK FOR CORRECT BCM OPERATION

    • Disconnect and inspect all the BCM connectors.
    • Repair:
      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary
    • Reconnect the BCM connectors. Make sure they seat and latch correctly.
    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK On-Line Automotive Service Information System(OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, Refer to BCM Hardware Testing .
    No  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
scientia non olet · About LEMON Manuals