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Home >> Mercury >> 2008 >> Milan Base, 2.3 Z, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1795 (Supplemental Restraint System) >> Diagnosis And Testing >> Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) >> Pinpoint Test - Supplemental Restraint System (SRS) >> Pinpoint Test L: DTCs B0052:11, B0052:12, B0052:13 and B0052:1D >> PINPOINT TEST L: DTCs B0052:11, B0052:12, B0052:13 AND B0052:1D

PINPOINT TEST L: DTCs B0052:11, B0052:12, B0052:13 AND B0052:1D

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.
WARNING: Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors. Failure to follow this instruction may result in the accidental deployment of the safety belt pretensioners, adaptive load limiting retractors, or safety belt inflators, which increases the risk of serious personal injury or death.
WARNING: Never probe the electrical connectors on air bag, Safety Canopy® or side air curtain modules. Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.
NOTE: Use the correct probe adapter(s) from the Flex Probe Kit when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.
Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
NOTE: Supplemental Restraint System (SRS) components should only be disconnected or reconnected when instructed to do so within a pinpoint test step. Failure to follow this instruction may result in incorrect diagnosis of the SRS.
NOTE: Always make sure the correct SRS component is being installed. Parts released for other vehicles may not be compatible even if they appear physically similar. Check the part number listed in the Ford Catalog Advantage™ to make sure the correct component is being installed. If an incorrect SRS component is installed, DTCs may set.
NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
  1. L1 RETRIEVE RCM DTCs 
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self Test - RCM.
    • Was DTC B0052:11, B0052:12, B0052:13 or B0052:1D retrieved on-demand during self-test? 
    • Yes  : This fault cannot be cleared until it is corrected and the DTC is no longer retrieved on-demand during self-test.

      For DTC B0052:11 or B0052:1D, GO to L2  .

      For DTC B0052:12, GO to  L4.

      For DTC B0052:13, GO to  L5.

    • No  : This is an intermittent fault when present as a Continuous Memory Diagnostic Trouble Code (CMDTC) only. GO to  L10.
  2. L2 CHECK THE PASSENGER SEATBELT SENSOR DTC FOR A FAULT STATUS CHANGE (SHORT TO GROUND OR CURRENT OUT OF RANGE INDICATED) 
    NOTE: This pinpoint test step will attempt to change the fault reported by the RCM by inducing a different fault condition. If the fault reported changes, this indicates the RCM is functioning correctly and is not the source of the fault.
    • Ignition OFF.
      WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.
    • Depower the SRS. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in this service information.
    • Disconnect: Passenger Safety Belt Buckle C3301 (MKZ) or C3295 (Fusion/Milan).
    • Repower the SRS. Do not prove out the SRS at this time. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in this service information.
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self Test - RCM.
    • DIAGNOSTIC TIP:  When viewing DTCs with the passenger safety belt buckle disconnected, an open circuit fault would normally be retrieved.
    • Did the on-demand DTC change from B0052:11 or B0052:1D to B0052:13? 
    • Yes  : GO to  L8.
    • No  : For DTC B0052:11, GO to L3  .

      For DTC B0052:1D, GO to  L9.

  3. L3 CHECK THE PASSENGER SAFETY BELT BUCKLE SWITCH CIRCUIT FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Depower the SRS. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in this service information.
    • Disconnect: RCM C310A and C310B.
    • Measure the resistance between passenger safety belt buckle C3295/ C3301-2, circuit CR203 (GY/VT), harness side and ground.
      Fig 1: Measuring Resistance Between Passenger Safety Belt Buckle C3295/ C3301-2, Circuit CR203 (GY/VT), Harness Side And Ground
      G07783854Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes  : GO to  L9.
    • No  : REPAIR circuit CR203 (GY/VT). Refer to SYSTEM WIRING DIAGRAMS article for schematic and connector information. GO to  L11.
  4. L4 CHECK THE PASSENGER SAFETY BELT BUCKLE SWITCH CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Depower the SRS. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in this service information.
    • Disconnect: Passenger Safety Belt Buckle C3301 (MKZ) or C3295 (Fusion/Milan).
    • Disconnect: C310A and C310B.
    • Repower the SRS. Do not prove out the SRS at this time. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in this service information.
    • Measure the voltage between passenger safety belt buckle C3295/C3301-2, circuit CR203 (GY/VT), harness side and ground.
      Fig 2: Measuring Voltage Between Passenger Safety Belt Buckle C3295/C3301-2, Circuit CR203 (GY/VT), Harness Side And Ground
      G07783855Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : REPAIR circuit CR203 (GY/VT).Refer to SYSTEM WIRING DIAGRAMS article for schematic and connector information. GO to  L11.
    • No  : GO to  L9.
  5. L5 CHECK THE PASSENGER SEATBELT SENSOR DTC FOR A FAULT STATUS CHANGE (OPEN INDICATED) 
    NOTE: This pinpoint test step will attempt to change the fault reported by the RCM by inducing a different fault condition. If the fault reported changes, this indicates the RCM is functioning correctly and is not the source of the fault.
    • Ignition OFF.
    • Depower the SRS. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in this service information.
    • Disconnect: Passenger Safety Belt Buckle C3301 (MKZ) or C3295 (Fusion/Milan).
    • Connect a fused jumper wire between passenger safety belt buckle C3295/C3301-2, circuit CR203 (GY/VT), harness side and C3295/ C3301-1, circuit GD127 (BK/BU), harness side.
    • Repower the SRS. Do not prove out the SRS at this time. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in this service information.
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self Test - RCM.
    • DIAGNOSTIC TIP:  When viewing DTCs with the passenger safety belt buckle circuits shorted together, a short to ground fault would normally be retrieved.
    • Did the on-demand DTC change from B0052:13 to B0052:11? 
    • Yes  : GO to  L8.
    • No  : GO to L6  .
  6. L6 CHECK THE PASSENGER SAFETY BELT BUCKLE SWITCH CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Depower the SRS. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in this service information.
    • Disconnect: RCM C310A and C310B.
    • Remove the fused jumper wire from the passenger safety belt buckle connector.
    • Measure the resistance between RCM C310B-33, circuit CR203 (GY/ VT), harness side and the passenger safety belt buckle C3295/ C3301-2, circuit CR203 (GY/VT), harness side.
      Fig 3: Measuring Resistance Between RCM C310B-33, Circuit CR203 (GY/ VT) And Passenger Safety Belt Buckle C3295/ C3301-2, Circuit CR203 (GY/VT), Harness Side
      G07783856Courtesy of FORD MOTOR CO.
    • Is the resistance less than 0.5 ohm? 
    • Yes  : GO to L7  .
    • No  : REPAIR circuit CR203 (GY/VT). Refer to SYSTEM WIRING DIAGRAMS article for schematic and connector information. GO to  L11.
  7. L7 CHECK THE PASSENGER SAFETY BELT BUCKLE SWITCH GROUND CIRCUIT FOR AN OPEN 
    • Measure the resistance between passenger safety belt buckle C3295/ C3301-1, circuit GD127 (BK/BU), harness side and ground.
      Fig 4: Measuring Resistance Between Passenger Safety Belt Buckle C3295/ C3301-1, Circuit GD127 (BK/BU), Harness Side And Ground
      G07783857Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to  L9.
    • No  : REPAIR circuit GD127 (BK/BU). Refer to SYSTEM WIRING DIAGRAMS article for schematic and connector information. GO to  L11.
  8. L8 CONFIRM THE PASSENGER SAFETY BELT BUCKLE SWITCH FAULT 
    NOTE: Make sure all restraint system components and the RCM electrical connectors are connected before carrying out the self-test. If not, DTCs will be recorded.
    • Ignition OFF.
    • Depower the SRS. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in this service information.
    • If previously installed, remove the fused jumper wire from the passenger safety belt buckle C3301 (MKZ) or C3295 (Fusion/Milan).
    • Prior to reconnecting any previously disconnected SRS component:
      • inspect connector(s) (including any in-line connectors) for pushed-out, loose or spread terminals and loose or frayed wire connections at terminals.
      • inspect wire harness for any damage, pinched, cut or pierced wires.
      • inspect RCM C310A and C310B Connector Position Assurance (CPA) lever/lock for correct operation. Refer to RESTRAINTS CONTROL MODULE (RCM)  in this service information.
      • repair any concerns found. Refer to SYSTEM WIRING DIAGRAMS article for schematic and connector information.
    • Connect: Passenger Safety Belt Buckle C3301 (MKZ) or C3295 (Fusion/Milan).
    • Repower the SRS. Do not prove out the SRS at this time. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in this service information.
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self Test - RCM.
    • Was the original DTC retrieved on-demand during self-test? 
    • Yes  : INSTALL a new passenger safety belt buckle. REFER to SAFETY BELT SYSTEM -- FUSION, MILAN & MKZ article. GO to  L11.
    • No  : In the process of diagnosing the fault, the fault condition has become intermittent. Do not install any new SRS components at this time. SRS components should only be installed when directed to do so in the pinpoint test  . GO to  L10.
  9. L9 CONFIRM THE RCM FAULT 
    NOTE: Make sure all restraint system components and the RCM electrical connectors are connected before carrying out the self-test. If not, DTCs will be recorded.
    • Ignition OFF.
    • Depower the SRS. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in this service information.
    • Prior to reconnecting any previously disconnected SRS component:
      • inspect connector(s) (including any in-line connectors) for pushed-out, loose or spread terminals and loose or frayed wire connections at terminals.
      • inspect wire harness for any damage, pinched, cut or pierced wires.
      • inspect C310A and C310B CPA lever/lock for correct operation. Refer to RESTRAINTS CONTROL MODULE (RCM)  in this service information.
      • repair any concerns found. Refer to SYSTEM WIRING DIAGRAMS article for schematic and connector information.
    • Connect: Passenger Safety Belt Buckle C3301 (MKZ) or C3295 (Fusion/Milan).
    • Connect: RCM C310A and C310B (if previously disconnected).
    • Repower the SRS. Do not prove out the SRS at this time. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in this service information.
    • Enter the following diagnostic mode on the scan tool: Self Test - RCM.
    • Was the original DTC retrieved on-demand during self-test? 
    • Yes  : INSTALL a new RCM. REFER to RESTRAINTS CONTROL MODULE (RCM)  in this service information. GO to  L11.
    • No  : In the process of diagnosing the fault, the fault condition has become intermittent. Do not install any new SRS components at this time. SRS components should only be installed when directed to do so in the pinpoint test  . GO to L10  .
  10. L10 CHECK FOR AN INTERMITTENT FAULT 
    • Ignition OFF.
    • Depower the SRS. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in this service information.
    • Disconnect the passenger safety belt buckle C3301 (MKZ) or C3295 (Fusion/Milan):
      • inspect connector(s) (including any in-line connectors) for corrosion, loose or spread terminals and loose or frayed wire connections at terminals.
      • inspect wire harness for any damage, pinched, cut or pierced wires.
      • repair any concerns found. Refer to SYSTEM WIRING DIAGRAMS article for schematic and connector information.
    • Connect: All Previously Disconnected Component(s)/Connector(s).
    • Repower the SRS. Do not prove out the SRS at this time. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in this service information.
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self Test - RCM.
    • Was DTC B0052:11, B0052:12, B0052:13 or B0052:1D retrieved on-demand during self-test? 
    • Yes  : This fault cannot be cleared until it is corrected and the DTC is no longer retrieved on-demand during self-test.

      For DTC B0052:11 or B0052:1D, GO to  L2.

      For DTC B0052:12, GO to  L4.

      For DTC B0052:13, GO to  L5.

    • No  : The fault is not present and cannot be recreated at this time. Do not install any new SRS components at this time. SRS components should only be installed when directed to do so in the pinpoint test  . GO to L11  .
  11. L11 CHECK FOR ADDITIONAL SRS DTCs 
    • Ignition OFF.
      WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.
    • Reconnect all SRS components (if previously disconnected).
    • If previously directed to depower the SRS, repower the SRS. Do not prove out the SRS at this time. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in this service information.
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self Test - Restraints.
      NOTE: When selecting Restraints from the Self Test menu, DTCs will be retrieved from the RCM and OCSM.
    • Are any RCM and/or OCSM DTCs retrieved on-demand during self-test? 
    • Yes  : Do not clear any DTCs until all DTCs have been resolved. GO to the DTC TABLES  in this service information for pinpoint test direction.
    • No  : CLEAR all RCM and OCSM CMDTCs. PROVE OUT the SRS. Repair is complete. RETURN the vehicle to the customer.
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