Ford Ecosport Owners and Service Manuals

Ford Ecosport: Supplemental Restraint System / Diagnosis and Testing - Pinpoint Test - DTC: AE, Vehicles With: Rear Seat Side Airbag

Ford Ecosport 2014-2026 Service and Repair Manual / Body and Paint / Supplemental Restraint System / Diagnosis and Testing - Pinpoint Test - DTC: AE, Vehicles With: Rear Seat Side Airbag

BXXXX:2B, BXXXX:81 (any BXXXX DTC with a 2B failure type, or any impact sensor with an 81 failure type) Signal Cross Coupled


Refer to Wiring Diagrams Cell 46 for schematic and connector information.

Normal Operation and Fault Conditions

The RCM monitors all deployable device and sensor circuits for a signal cross coupled (short) between components. Signal cross coupled Diagnostic Trouble Codes (DTCs) are present when one or both circuits of a component are shorted to one or both circuits of another component. Signal cross coupled Diagnostic Trouble Codes (DTCs) do not set when the circuits of a single device are shorted together, a different DTC is present (for example, a DTC for circuit resistance below threshold). The RCM sends a message to the IPC to illuminate the airbag warning indicator. When a normal loop fault is present (one loop is either shorted to battery/ground, open circuit or low resistance), then signal cross coupled diagnostics are not active. Once the normal loop fault is repaired, the signal cross coupled diagnostics resume.


  DTC Fault Trigger Conditions


  DTC Description Fault Trigger Conditions
B0001:2B Driver Frontal Stage 1 Deployment Control: Signal Cross Coupled If the RCM detects a short between the driver airbag stage 1 circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B0002:2B Driver Frontal Stage 2 Deployment Control: Signal Cross Coupled If the RCM detects a short between the driver airbag stage 2 circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B0004:2B Driver Knee Bolster Deployment Control: Signal Cross Coupled If the RCM detects a short between the driver knee airbag circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B0010:2B Passenger Frontal Stage 1 Deployment Control: Signal Cross Coupled If the RCM detects a short between the passenger airbag stage 1 circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B0011:2B Passenger Frontal Stage 2 Deployment Control: Signal Cross Coupled If the RCM detects a short between the passenger airbag stage 2 circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B0013:2B Passenger Knee Bolster Deployment Control: Signal Cross Coupled If the RCM detects a short between the passenger knee airbag circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B0050:2B Driver Seatbelt Sensor: Signal Cross Coupled If the RCM detects a short between the driver seatbelt sensor circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B0052:2B Passenger Seatbelt Sensor: Signal Cross Coupled If the RCM detects a short between the passenger seatbelt sensor circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B0070:2B Driver Seatbelt Pretensioner "A" Deployment Control: Signal Cross Coupled If the RCM detects a short between the driver seatbelt anchor pretensioner circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B0072:2B Passenger Seatbelt Pretensioner "A" Deployment Control: Signal Cross Coupled If the RCM detects a short between the passenger seatbelt anchor pretensioner circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B007E:2B Driver Seatbelt Pretensioner "C" Deployment Control: Signal Cross Coupled If the RCM detects a short between the driver seatbelt retractor pretensioner circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B007F:2B Passenger Seatbelt Pretensioner "C" Deployment Control: Signal Cross Coupled If the RCM detects a short between the passenger seatbelt retractor pretensioner circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B0082:2B Passenger Seatbelt Load Limiter Deployment Control: Signal Cross Coupled If the RCM detects a short between the passenger seatbelt load limiter circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B00B5:2B Driver Seat Track Position Restraints Sensor: Signal Cross Coupled If the RCM detects a short between the driver seat position sensor circuit and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B00C5:2B Passenger Seat Track Position Restraints Sensor: Signal Cross Coupled If the RCM detects a short between the passenger seat position sensor circuit and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B11CF:2B Passenger Frontal Airbag Canister Vent: Signal Cross Coupled If the RCM detects a short between the passenger airbag canister vent circuit and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B1404:2B Driver Side Airbag Deployment Control: Signal Cross Coupled If the RCM detects a short between the driver side airbag circuit and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B1405:2B Driver Side Curtain Deployment Control 1: Signal Cross Coupled If the RCM detects a short between the driver side air curtain circuit and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B1407:2B Passenger Side Airbag Deployment Control: Signal Cross Coupled If the RCM detects a short between the passenger side airbag circuit and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B1408:2B Passenger Side Curtain Deployment Control 1: Signal Cross Coupled If the RCM detects a short between the passenger side air curtain circuit and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B140A:2B Second Row Driver Side Airbag Deployment Control: Signal Cross Coupled If the RCM detects a short between the second row driver side airbag circuit and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B140B:2B Second Row Passenger Side Airbag Deployment Control: Signal Cross Coupled If the RCM detects a short between the second row passenger side airbag circuit and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B1413:81 Driver Frontal Restraints Sensor: Invalid Serial Data Received If the RCM detects a short between the driver front impact severity sensor circuit and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B1414:81 Driver Side Restraints Sensor 1: Invalid Serial Data Received If the RCM detects a short between the driver front door side impact sensor circuit and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B1415:81 Driver Side Restraints Sensor 2: Invalid Serial Data Received If the RCM detects a short between the driver C-pillar side impact sensor circuit and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B1417:81 Passenger Frontal Restraints Sensor: Invalid Serial Data Received If the RCM detects a short between the passenger front impact severity sensor circuit and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B1418:81 Passenger Side Restraints Sensor 1: Invalid Serial Data Received If the RCM detects a short between the passenger front door side impact sensor circuit and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B1419:81 Passenger Side Restraints Sensor 2: Invalid Serial Data Received If the RCM detects a short between the passenger C-pillar side impact sensor circuit and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.

Possible Causes

  • Wiring, terminals or connectors
  • RCM

Visual Inspection and Diagnostic Pre-Checks

  • Inspect the affected wiring harness(es) for damage, if accessible.

PINPOINT TEST A: BXXXX:2B (ANY BXXXX DTC (DIAGNOSTIC TROUBLE CODE) WITH A 2B FAILURE TYPE) SIGNAL CROSS COUPLED
  WARNING: Incorrect repair techniques or actions can cause an accidental Supplemental Restraint System (SRS) deployment. Never compromise or depart from these instructions. Failure to precisely follow all instructions could result in serious personal injury from an accidental deployment.
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
NOTE: Only disconnect or reconnect SRS components 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 parts catalog to make sure the correct component is being installed. If an incorrect SRS component is installed, Diagnostic Trouble Codes (DTCs) may set.
NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
A1 RETRIEVE RCM (RESTRAINTS CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  •   WARNING: Before beginning any service procedure in this section, refer to Safety Warnings in section 100-00 General Information. Failure to follow this instruction may result in serious personal injury.
    REFER to: Pyrotechnic Device Health and Safety Precautions (100-00 General Information, Description and Operation).
  • Ignition ON.
  • Using a diagnostic scan tool, carry out RCM self-test.

Were any signal cross coupled or invalid data Diagnostic Trouble Codes (DTCs) retrieved on-demand during self-test?
Yes If DTC U3003:16 or U3003:17 is also retrieved on-demand,
REFER to: Pinpoint Test - DTC: AM, Vehicles With: Rear Seat Side Airbag (501-20B Supplemental Restraint System, Diagnosis and Testing). If DTC U3003:16 or U3003:17 is not retrieved on-demand during self-test, DIAGNOSE those Diagnostic Trouble Codes (DTCs).
This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the on-demand self test. GO to A2
No If DTC U3003:16 or U3003:17 is also retrieved on-demand,
REFER to: Pinpoint Test - DTC: AM, Vehicles With: Rear Seat Side Airbag (501-20B Supplemental Restraint System, Diagnosis and Testing). If DTC U3003:16 or U3003:17 is not retrieved on-demand during self-test, DIAGNOSE the Continuous Memory Diagnostic Trouble Codes (CMDTCs).
This is an intermittent fault when present as a CMDTC only. GO to A4

A2 CHECK THE AFFECTED CIRCUITS FOR A SIGNAL CROSS COUPLED FAULT
  • Ignition OFF.
  • Depower the SRS .
    REFER to: Supplemental Restraint System (SRS) Depowering (501-20B Supplemental Restraint System, General Procedures).
  • Disconnect: RCM C310A and C310B.
  • Using the Diagnostic Trouble Codes (DTCs) present on-demand, identify the affected SRS devices.
  • NOTE: Most signal cross coupled faults are due to connector and/or wiring harness damage. Carry out a thorough inspection of connector(s) and/or wiring harness for damage. Disconnect all of the affected SRS devices.
  • Using the following table, measure the resistance between the circuits of one affected SRS device to the other affected SRS device.
    • Example: If Diagnostic Trouble Codes (DTCs) B0001:2B and B0010:2B are being diagnosed, measure the resistance between circuit CR101 to circuits CR103 and RR103. Then measure the resistance between circuit RR101 to circuits CR103 and RR103.
    Device/Loop (DTC ) Connector
    Driver airbag stage 1 (B0001:2B)
    • C216A-1
    • C216A-2
    Driver airbag stage 2 (B0002:2B)
    • C216B-1
    • C216B-2
    Driver knee airbag (B0004:2B)
    • C2432-1
    • C2432-2
    Passenger airbag stage 1 (B0010:2B)
    • C256A-1
    • C256A-2
    Passenger airbag stage 2 (B0011:2B)
    • C256B-1
    • C256B-2
    Passenger knee airbag (B0013:2B)
    • C2607-1
    • C2607-2
    Driver seatbelt buckle sensor (B0050:2B)
    • C3065-2
    Passenger seatbelt buckle sensor (B0052:2B)
    • C3066-2
    Driver seatbelt anchor pretensioner (B0070:2B)
    • C3844-1
    • C3844-2
    Passenger seatbelt anchor pretensioner (B0072:2B)
    • C3845-1
    • C3845-2
    Driver seatbelt retractor pretensioner (B007E:2B)
    • C3201-1
    • C3201-2
    Passenger seatbelt retractor pretensioner (B007F:2B)
    • C3202-1
    • C3202-2
    Passenger seatbelt load limiter (B0082:2B)
    • C303-1
    • C303-2
    Driver seat position sensor (B00B5:2B)
    • C356-2
    Passenger seat position sensor (B00C5:2B)
    • C3288-2
    Passenger airbag canister vent (B11CF:2B)
    • C2562-1
    • C2562-2
    Driver side airbag (B1404:2B)
    • C3049-1 (Inline)
    • C3049-2 (Inline)
    Driver side curtain airbag (B1405:2B)
    • C9018-1
    • C9018-2
    Passenger side airbag (B1407:2B)
    • C3050-1 (Inline)
    • C3050-2 (Inline)
    Passenger side curtain airbag (B1408:2B)
    • C9019-1
    • C9019-2
    Second row driver side airbag (B140A:2B)
    • C3471-1
    • C3471-2
    Second row passenger side airbag (B140B:2B)
    • C3472-1
    • C3472-2
    Driver front impact severity sensor (B1413:81)
    • C1465-1
    • C1465-2
    Driver front door side impact sensor (B1414:81)
    • C567-1
    • C567-2
    Driver C-pillar side impact sensor (B1415:81)
    • C3209-1
    • C3209-2
    Passenger front impact severity sensor (B1417:81)
    • C1466-1
    • C1466-2
    Passenger front door side impact sensor (B1418:81)
    • C644-1
    • C644-2
    Passenger C-pillar side impact sensor (B1419:81)
    • C3211-1
    • C3211-2

Are the resistances greater than 10,000 ohms between the affected circuits?
Yes GO to A3
No REPAIR the affected circuits.
Refer to Wiring Diagrams Cell 5 for schematic and connector information.
GO to A5

A3 CONFIRM THE RCM (RESTRAINTS CONTROL MODULE) FAULT

NOTE: Make sure all SRS components and the RCM electrical connectors are connected before carrying out the self-test. If not, Diagnostic Trouble Codes (DTCs) will be recorded.

  • Prior to reconnecting any previously disconnected SRS component:
    • inspect connector(s) (including any inline 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
    • repair any concerns found.
      Refer to Wiring Diagrams Cell 5 for schematic and connector information.
  • Connect all previously disconnected restraint system component(s).
  • Connect: RCM C310A and C310B.
  • Repower the SRS . Do not prove out the SRS at this time.
    REFER to: Supplemental Restraint System (SRS) Repowering (501-20B Supplemental Restraint System, General Procedures).
  • Ignition ON.
  • Using a diagnostic scan tool, carry out RCM self-test.

Were any signal cross coupled or invalid data Diagnostic Trouble Codes (DTCs) retrieved on-demand during self-test?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new RCM .
REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation).
GO to A5
No In the process of diagnosing the fault, the fault condition has become intermittent. Do not install any new SRS components at this time. Install SRS components only when directed to do so in the pinpoint test. GO to A4

A4 CHECK FOR AN INTERMITTENT FAULT

NOTE: Most cross link faults are due to connector and/or wiring harness damage. Carry out a thorough inspection of connector(s) and/or wiring harness for damage.

  • Ignition OFF.
  • Depower the SRS .
    REFER to: Supplemental Restraint System (SRS) Depowering (501-20B Supplemental Restraint System, General Procedures).
  • Disconnect all of the affected SRS devices.
    Refer to Wiring Diagrams Cell 46 for schematic and connector information.
  • Inspect the wiring harness(es) for any type of damage. If damage is found, repair as necessary and
    Refer to Wiring Diagrams Cell 5 for schematic and connector information.
  • Repower the SRS . Do not prove out the SRS at this time.
    REFER to: Supplemental Restraint System (SRS) Repowering (501-20B Supplemental Restraint System, General Procedures).
  • Ignition ON.
  • Using a diagnostic scan tool, carry out RCM self-test.

Were any signal cross coupled or invalid data Diagnostic Trouble Codes (DTCs) 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. GO to A2
No The fault is not present and cannot be recreated at this time. CHECK for causes of the intermittent fault. ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition frequently. Do not install any new SRS components at this time. Install SRS components only when directed to do so in the pinpoint test. GO to A5

A5 CHECK FOR ADDITIONAL SRS (SUPPLEMENTAL RESTRAINT SYSTEM) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Ignition OFF.
  • 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) Repowering (501-20B Supplemental Restraint System, General Procedures).
  • Ignition ON.
  • Using a diagnostic scan tool, carry out RCM self-test.

Are any RCM Diagnostic Trouble Codes (DTCs) retrieved on-demand during self-test?
Yes Do not clear any Diagnostic Trouble Codes (DTCs) until all Diagnostic Trouble Codes (DTCs) have been resolved. DIAGNOSE and REPAIR the RCM Diagnostic Trouble Codes (DTCs).
REFER to: Airbag Supplemental Restraint System (SRS) - Vehicles With: Rear Seat Side Airbag (501-20B Supplemental Restraint System, Diagnosis and Testing).
No The repair is complete. RETURN the vehicle to the customer.


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