Pinpoint Test Y : B140C:11, B140C:12, B140C:13, B140C:1D

Refer to Supplemental Restraint System for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Airbag and Seatbelt Pretensioner Supplemental Restraint System (SRS) - System Operation and Component Description .

The RCM continuously monitors the second row driver side seatbelt buckle sensor circuits for the following faults:

Open circuit
Short to voltage
Short to ground
Current out of range
Faulted second row left seatbelt buckle sensor

If a fault is detected, the RCM stores DTC B140C:11, B140C:12, B140C:13 or B140C:1D in memory and sends a message to the IPC to illuminate the airbag warning indicator.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
RCM B140C:11	Second Row Driver Side Seatbelt Sensor: Circuit Short To Ground	A fault is indicated when the RCM senses a short to ground on the second row driver side seatbelt buckle sensor circuit for more than 6 seconds.
RCM B140C:12	Second Row Driver Side Seatbelt Sensor: Circuit Short To Battery	A fault is indicated when the RCM senses a short to voltage on the second row driver side seatbelt buckle sensor circuit for more than 6 seconds.
RCM B140C:13	Second Row Driver Side Seatbelt Sensor: Circuit Open	A fault is indicated when the RCM senses an open on either second row driver side seatbelt buckle sensor circuit for more than 6 seconds.
RCM B140C:1D	Second Row Driver Side Seatbelt Sensor: Circuit Current Out Of Range	A fault is indicated when the RCM measures current outside of an acceptable range on the second row driver side seatbelt buckle sensor circuit for more than 6 seconds.

Possible Sources

Wiring, terminals or connectors
Second row driver side seatbelt buckle sensor
RCM

Visual Inspection and Pre-checks

Inspect for a damaged rear seatbelt buckle assembly.
Inspect for damaged wiring harness(es).
Inspect for loose or damaged connectors.

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.
NOTE: 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: 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 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.

Y1 RETRIEVE RCM (RESTRAINTS CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

WARNING: Before beginning any service procedure, refer to Safety Warnings in General Information. Failure to follow this instruction may result in serious personal injury.

REFER to: Pyrotechnic Device Health and Safety Precautions .

Ignition ON.

Using a diagnostic scan tool, carry out RCM self-test.

Was DTC B140C:11, B140C:12, B140C:13 and B140C:1D retrieved on-demand during self-test?

Yes

If DTC U3003:16 or U3003:17 is also retrieved on-demand, GO to Pinpoint Test AX If DTC U3003:16 or U3003:17 is not retrieved on-demand during self-test, DIAGNOSE the second row driver side seatbelt sensor Diagnostic Trouble Codes (DTCs). This fault cannot be cleared until it is corrected and the DTC is no longer retrieved on-demand during self-test. For DTC B140C:11 or B140C:1D, GO to Y2 For DTC B140C:12, GO to Y4 For DTC B140C:13, GO to Y5

If DTC U3003:16 or U3003:17 is also retrieved on-demand, GO to Pinpoint Test AX If DTC U3003:16 or U3003:17 is not retrieved on-demand during self-test, DIAGNOSE the second row driver side seatbelt sensor Continuous Memory Diagnostic Trouble Codes (CMDTCs). This is an intermittent fault when present as a CMDTC only. GO to Y10

Y2 CHECK THE SECOND ROW DRIVER SIDE SEATBELT SENSOR DTC (DIAGNOSTIC TROUBLE CODE) FOR A FAULT STATUS CHANGE (SHORT TO GROUND OR CURRENT OUT OF RANGE INDICATED)

NOTE: This pinpoint test step attempts to change the fault reported by the RCM by inducing a different fault condition. If the reported fault 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 .
- Disconnect Second Row Left Seatbelt Inflator C3646.
- Repower the SRS. Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Repowering .
- Ignition ON.
- Using a diagnostic scan tool, carry out RCM self-test.
- DIAGNOSTIC TIP: When viewing Diagnostic Trouble Codes (DTCs) with the second row driver side seatbelt sensor disconnected, an open circuit fault is normally retrieved. An open circuit fault is also retrieved for the second row driver side seatbelt inflator, since it shares a connector with the buckle sensor.
Did the on-demand DTC change from B140C:11 or B140C:1D to B140C:13?

Yes GO to Y8

No For DTC B140C:11, GO to Y3 For DTC B140C:1D, GO to Y9

Y3 CHECK THE SECOND ROW DRIVER SIDE SEATBELT SENSOR CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering .

Disconnect RCM C310A and C310B.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3646-4	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to Y9

No	REPAIR the circuit. Refer to Connector Repair Procedures for schematic and connector information. GO to Y11

Y4 CHECK THE SECOND ROW DRIVER SIDE SEATBELT SENSOR CIRCUIT FOR A SHORT TO VOLTAGE

Ignition OFF.

Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering .

Disconnect RCM C310A and C310B.

Disconnect Second Row Left Seatbelt Inflator C3646.

Repower the SRS. Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Repowering .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3646-4	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit. Refer to Connector Repair Procedures for schematic and connector information. GO to Y11

GO to Y9

Y5 CHECK THE SECOND ROW DRIVER SIDE SEATBELT SENSOR DTC (DIAGNOSTIC TROUBLE CODE) FOR A FAULT STATUS CHANGE (OPEN INDICATED)

NOTE: This pinpoint test step attempts to change the fault reported by the RCM by inducing a different fault condition. If the reported fault 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 .

Disconnect Second Row Left Seatbelt Inflator C3646.

Connect a fused jumper wire:

Lead 1	Measurement / Action	Lead 2
C3646-4	Courtesy of FORD MOTOR COMPANY	C3646-5

Repower the SRS. Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Repowering .

Ignition ON.

Using a diagnostic scan tool, carry out RCM self-test.

DIAGNOSTIC TIP: When viewing Diagnostic Trouble Codes (DTCs) with the second row driver side seatbelt sensor circuits shorted together, a short to ground fault is normally retrieved. An open circuit fault is also retrieved for the second row driver side seatbelt inflator, since it shares a connector with the buckle sensor.

Did the on-demand DTC change from B140C:13 to B140C:11?

Yes	REMOVE the fused jumper wire and GO to Y8

No	REMOVE the fused jumper wire and GO to Y6

Y6 CHECK THE SECOND ROW DRIVER SIDE SEATBELT SENSOR CIRCUIT FOR AN OPEN

Ignition OFF.

Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering .

Disconnect RCM C310A and C310B.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C310A-25	Courtesy of FORD MOTOR COMPANY	C3646-4

Is the resistance less than 0.5 ohm?

Yes

GO to Y7

No	REPAIR the circuit. Refer to Connector Repair Procedures for schematic and connector information. GO to Y11

Y7 CHECK THE SECOND ROW DRIVER SIDE SEATBELT SENSOR GROUND CIRCUIT FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3646-5	Courtesy of FORD MOTOR COMPANY	C310B-53

Is the resistance less than 3 ohms?

Yes

GO to Y9

No	REPAIR the circuit. Refer to Connector Repair Procedures for schematic and connector information. GO to Y11

Y8 CONFIRM THE SECOND ROW DRIVER SIDE SEATBELT SENSOR 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) are recorded.

Ignition OFF.

Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering .

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 wiring harness for any damaged, 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 Connector Repair Procedures for schematic and connector information.

Connect Second Row Left Seatbelt Inflator C3646.

Repower the SRS. Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Repowering .

Ignition ON.

Using a diagnostic scan tool, carry out RCM self-test.

Was the original DTC retrieved on-demand during self-test?

Yes	INSTALL a new second row driver side seatbelt buckle (includes buckle sensor). REFER to: Second Row Seatbelt Buckle . GO to Y11

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 Y10

Y9 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) are recorded.

Ignition OFF.

Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering .

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 wiring harness for any damaged, 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 Connector Repair Procedures for schematic and connector information.

Connect RCM C310A and C310B (if previously disconnected).

Connect Second Row Left Seatbelt Inflator C3646.

Repower the SRS. Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Repowering .

Ignition ON.

Using a diagnostic scan tool, carry out RCM self-test.

Was the original DTC retrieved on-demand during self-test?

Yes

CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new RCM. REFER to: Restraints Control Module (RCM) . GO to Y11

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 Y10

Y10 CHECK FOR AN INTERMITTENT FAULT

Ignition OFF.

Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering .

Disconnect Second Row Left Seatbelt Inflator C3646.
- Inspect connector(s) (including any inline connectors) for corrosion, loose or spread terminals and loose or frayed wire connections at terminals.
- Inspect wiring 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 Connector Repair Procedures 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) Repowering .

Ignition ON.

Using a diagnostic scan tool, carry out RCM self-test.

Was DTC B140C:11, B140C:12, B140C:13 and B140C: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 B140C:11 or B140C:1D, GO to Y2 For DTC B140C:12, GO to Y4 For DTC B140C:13, GO to Y5

No	The fault is not present and cannot be recreated at this time. 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 Y11

Y11 CHECK FOR ADDITIONAL SRS (SUPPLEMENTAL RESTRAINT SYSTEM) DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition OFF.

Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering .

Reconnect all SRS components (if previously disconnected).

Repower the SRS.
Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Repowering .

Ignition ON.

NOTE: When selecting Restraints from the Self Test menu, DTCs are retrieved from the RCM and OCSM.

Using a diagnostic scan tool, carry out

Restraints self-test.

Are any RCM or OCSM 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. second row driver side seatbelt buckle

No	The repair is complete. RETURN the vehicle to the customer.