Pinpoint Test H: DTC B2A25, B2574, Or B2575
WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 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 DOOR LOCK CONTROL SWITCH in this service information. 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 DOOR LOCK CONTROL SWITCH in this service information. 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.
- 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 DOOR LOCK CONTROL SWITCH in this service information. 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.
- 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 DRIVER DOOR MODULE (DDM) in this service information. 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 MULTIFUNCTION ELECTRONIC MODULES -- FUSION, MILAN & MKZ article. 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.