Pinpoint Test H: DTC B2A25, B2574, Or B2575

WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. 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.

H1 CHECK THE RECORDED SJB DTCs FROM THE SELF-TEST
- Check the recorded results from the SJB self-test.
- Is DTC B2A25 present?

Yes: GO to H2.
No: For DTCs B2574 or B2575, GO to H5.

H2 CHECK THE RH DOOR LOCK CONTROL SWITCH
- Disconnect: RH Door Lock Control Switch C605.
- Repeat the SJB self-test.
- Is DTC B2A25 retrieved again?

Yes: For Fusion and Milan, LEAVE the switch disconnected. GO to H3.
For MKZ, LEAVE the switch disconnected. GO to H4.
No: INSTALL a new RH door lock control switch. REFER to Removal and Installation . TEST the system for normal operation.

H3 CHECK THE LH DOOR LOCK CONTROL SWITCH - FUSION/MILAN
- Disconnect: LH Door Lock Control Switch C505.
- Repeat the SJB self-test.
- Is DTC B2A25 retrieved again?

Yes: LEAVE the switch disconnected. GO to H4.
No: INSTALL a new LH door lock control switch. REFER to Removal and Installation . TEST the system for normal operation.

H4 CHECK THE SJB LOCK INPUT CIRCUIT OR THE UNLOCK INPUT CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: SJB C2280c.
- Measure the resistance between the RH door lock control switch C605-1, circuit CPK19 (BU/GN), harness side and ground; and between the RH door lock control switch C605-3, circuit CPK23 (YE/VT), harness side and ground.
  
  Fig 1: Checking SJB Lock Input Circuit Or Unlock Input Circuit For Short To Ground
  Courtesy of FORD MOTOR CO.
- Are the resistances greater than 10,000 ohms?

Yes: GO to H8.
No: REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.

H5 CHECK THE LH DOOR LOCK CONTROL SWITCH - MKZ
- Disconnect: LH Door Lock Control Switch C505.
- Repeat the DDM self-test.
- Is DTC B2574 or B2575 retrieved?

Yes: LEAVE the switch disconnected. GO to H6.
No: INSTALL a new LH door lock control switch. REFER to Removal and Installation . TEST the system for normal operation.

H6 CHECK THE DDM LOCK INPUT CIRCUIT OR THE UNLOCK INPUT CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: DDM C568a.
- Measure the resistance between the LH door lock control switch C505-1, circuit CPL42 (GY/YE), harness side and ground; and between the LH door lock control switch C505-3, circuit CPL43 (VT/GY), harness side and ground.
  
  Fig 2: Checking DDM Lock Input Circuit Or Unlock Input Circuit For Short To Ground
  Courtesy of FORD MOTOR CO.
- Are the resistances greater than 10,000 ohms?

Yes: GO to H7.
No: REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.

H7 CHECK FOR CORRECT DDM OPERATION
- Disconnect all the DDM connectors.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect all the DDM connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes: INSTALL a new DDM . REFER to REMOVAL AND INSTALLATION . TEST the system for normal operation.
No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

H8 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?

Yes: INSTALL a new SJB . REFER to INSTALLATION . TEST the system for normal operation.
No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.