Pinpoint Test Aa: B140A:11, B140A:12, B140A:13, B140A:1A

Refer to SUPPLEMENTAL RESTRAINT SYSTEM for schematic and connector information.

Normal Operation and Fault Conditions

The RCM continuously monitors the second row driver seat side airbag circuits for the following faults:

Resistance out of range
Unexpected voltage
Short to ground
Faulted second row driver seat side airbag

If a fault is detected, the RCM stores DTC B140A:11, B140A:12, B140A:13 or B140A:1A in memory and sends a message to the IPC to illuminate the airbag warning indicator.

The RCM analyzes the deployment loop resistance to determine if a fault exists. The value displayed in the PID is the deployment loop resistance measured by the RCM. If the value displayed is lower or higher than the desired range (refer to diagram below), the RCM can set a DTC. As the deployment loop resistance drifts farther outside the desired range, the chance for a DTC increases. Small variations in resistance can occur due to the effect of road vibrations on terminal fit. Crimps and terminals can be affected by stress and harness movement and can cause an increase in resistance due to wire strain. These variables can result in an intermittent fault. For this reason, the test requires the PID value to be within the desired range before the fault is considered repaired, regardless if the module is reporting an on-demand DTC at the time of diagnosis. Following this direction helps make sure that minor changes in resistance do not create a repeat concern. This test uses process of elimination to diagnose each part of the deployment loop circuit including:

Wiring
Connections
Second row driver seat side airbag
RCM

Courtesy of FORD MOTOR COMPANY

1 - May set DTC
2 - Desired range

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
RCM B140A:11	Second Row Driver Side Airbag Deployment Control: Circuit Short To Ground	A fault is indicated when the RCM senses a short to ground on either second row driver seat side airbag circuit for more than 6 seconds.
RCM B140A:12	Second Row Driver Side Airbag Deployment Control: Circuit Short To Battery	A fault is indicated when the RCM senses a short to voltage on either second row driver seat side airbag for more than 6 seconds.
RCM B140A:13	Second Row Driver Side Airbag Deployment Control: Circuit Open	A fault is indicated when the RCM measures more than the desired resistance between the second row driver seat side airbag circuits for more than 6 seconds.
RCM B140A:1A	Second Row Driver Side Airbag Deployment Control: Circuit Resistance Below Threshold	A fault is indicated when the RCM measures less than the desired resistance between the second row driver seat side airbag circuits for more than 6 seconds.

Possible Sources

Wiring, terminals or connectors
Second row driver seat side airbag
RCM

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: 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.

AA1 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, perform RCM self-test.

Was DTC B140A:11, B140A:12, B140A:13 and B140A:1A 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.If DTC U3003:16 or U3003:17 is also retrieved on-demand, GO to Pinpoint Test BA If DTC U3003:16 or U3003:17 is not retrieved on-demand during self-test, DIAGNOSE the second row driver seat side airbag Diagnostic Trouble Codes (DTCs).For DTC B140A:13 or B140A:1A, GO to AA2 For DTC B140A:11, GO to AA8 For DTC B140A:12, GO to AA10

This is an intermittent fault when present as a CMDTC only.If DTC U3003:16 or U3003:17 is also retrieved on-demand, GO to Pinpoint Test BA If DTC U3003:16 or U3003:17 is not retrieved on-demand during self-test, DIAGNOSE the second row driver seat side airbag Continuous Memory Diagnostic Trouble Codes (CMDTCs).For DTC B140A:13 or B140A:1A, GO to AA13 For DTC B140A:11, GO to AA14 For DTC B140A:12, GO to AA15

AA2 CHECK THE SECOND ROW DRIVER SEAT SIDE AIRBAG DEPLOYMENT CONTROL RESISTANCE (DEPLOY_16_R) PID (PARAMETER IDENTIFICATION)

Access the RCM and monitor the DEPLOY_16_R (mOhm) PID
- Monitor and record the resistance value displayed by the PID.
Does the PID value read between 1.7 and 2.98 ohms?

Yes GO to AA12

No GO to AA3

AA3 CHECK THE SECOND ROW DRIVER SEAT SIDE AIRBAG DEPLOYMENT CONTROL RESISTANCE (DEPLOY_16_R) PID (PARAMETER IDENTIFICATION) WHILE CARRYING OUT THE HARNESS TEST

Access the RCM and monitor the DEPLOY_16_R (mOhm) PID

While monitoring the PID, carry out the harness test of the second row driver seat side airbag circuits and accessible connectors (including any inline connectors) by wiggling and flexing the wire harness and connectors frequently. Record the resistance value indicated by the PID.

Does the PID value read between 1.7 and 2.98 ohms while carrying out the harness test?

Yes	DEPOWER the SRS and REPAIR the connector, terminals or wire harness as needed. REFER to: Supplemental Restraint System (SRS) Depowering . Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information. GO to AA17

No	For PID value less than 1.7 ohms, GO to AA4 For PID value greater than 2.98 ohms, GO to AA6

AA4 CHECK THE SECOND ROW DRIVER SEAT SIDE AIRBAG DEPLOYMENT CONTROL DTC (DIAGNOSTIC TROUBLE CODE) FOR A FAULT STATUS CHANGE (LOW RESISTANCE 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 Driver Seat Side Airbag (Inline) C446.
- 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, perform RCM self-test.
- DIAGNOSTIC TIP:
  When viewing Diagnostic Trouble Codes (DTCs) with the second row driver seat side airbag disconnected, an open circuit fault is normally retrieved.
Did the on-demand DTC change from B140A:1A to B140A:13?

Yes GO to AA11

No GO to AA5

AA5 CHECK FOR A SHORT BETWEEN THE SECOND ROW DRIVER SEAT SIDE AIRBAG CIRCUITS

Ignition OFF.

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

Disconnect RCM C310A and C310B.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C446 Pin 1	Courtesy of FORD MOTOR COMPANY	C446 Pin 2

Is the resistance greater than 10, 000 ohms?

Yes	GO to AA12

No	REPAIR the circuit(s). Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information. GO to AA17

AA6 CHECK THE SECOND ROW DRIVER SEAT SIDE AIRBAG CIRCUITS FOR AN OPEN

Ignition OFF.

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

Disconnect Second Row Driver Seat Side Airbag (Inline) C446.

Disconnect RCM C310A and C310B.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C310B Pin 13	Courtesy of FORD MOTOR COMPANY	C446 Pin 1
C310B Pin 14	Courtesy of FORD MOTOR COMPANY	C446 Pin 2

Are the resistances less than 0.5 ohm?

Yes

GO to AA7

No	REPAIR the circuit(s). Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information. GO to AA17

AA7 CHECK THE SECOND ROW DRIVER SEAT SIDE AIRBAG DEPLOYMENT CONTROL 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.

Connect RCM C310A and C310B.

Connect a fused jumper wire:

Lead 1	Measurement / Action	Lead 2
C446 Pin 1	Courtesy of FORD MOTOR COMPANY	C446 Pin 2

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, perform RCM self-test.

DIAGNOSTIC TIP:
When viewing Diagnostic Trouble Codes (DTCs) with the second row driver seat side airbag circuits shorted together, a low resistance fault is normally retrieved.

Did the on-demand DTC change from B140A:13 to B140A:1A?

Yes	REMOVE the fused jumper wire and GO to AA11

No	REMOVE the fused jumper wire and GO to AA12

AA8 CHECK THE SECOND ROW DRIVER SEAT SIDE AIRBAG DEPLOYMENT CONTROL DTC (DIAGNOSTIC TROUBLE CODE) FOR A FAULT STATUS CHANGE (SHORT TO GROUND 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 Driver Seat Side Airbag (Inline) C446.
- 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, perform RCM self-test.
- DIAGNOSTIC TIP:
  When viewing Diagnostic Trouble Codes (DTCs) with the second row driver seat side airbag disconnected, an open circuit fault is normally retrieved.
Did the on-demand DTC change from B140A:11 to B140A:13?

Yes GO to AA11

No GO to AA9

AA9 CHECK THE SECOND ROW DRIVER SEAT SIDE AIRBAG CIRCUITS 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
C446 Pin 1	Courtesy of FORD MOTOR COMPANY	Ground
C446 Pin 2	Courtesy of FORD MOTOR COMPANY	Ground

Are the resistances greater than 10, 000 ohms?

Yes	GO to AA12

No	REPAIR the circuit(s). Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for OEM_CONNECTOR_REPAIR_PROCEDURES schematic and connector information. GO to AA17

AA10 CHECK THE SECOND ROW DRIVER SEAT SIDE AIRBAG CIRCUITS FOR A SHORT TO VOLTAGE

Ignition OFF.

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

Disconnect Second Row Driver Seat Side Airbag (Inline) C446.

Disconnect RCM C310A and C310B.

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
C446 Pin 1	Courtesy of FORD MOTOR COMPANY	Ground
C446 Pin 2	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit(s). Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information. GO to AA17

No	GO to AA12

AA11 CONFIRM THE SECOND ROW DRIVER SEAT SIDE AIRBAG 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.

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 wire 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 OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information.

Connect Second Row Driver Seat Side Airbag (Inline) C446.

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, perform RCM self-test.

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

Yes

REMOVE and INSPECT the second row driver seat side airbag harness for damage. REFER to: Second Row Seat Side Airbag . If a concern is found, REPAIR as necessary. Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information. GO to AA17 If a concern is not found, INSTALL a new second row driver seat side airbag. REFER to: Second Row Seat Side Airbag . GO to AA17

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.For DTC B140A:13 or B140A:1A, GO to AA13 For DTC B140A:11, GO to AA14 For DTC B140A:12, GO to AA15

AA12 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.

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 wire 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 OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information.

Connect Second Row Driver Seat Side Airbag (Inline). C446.

Connect RCM C310A and C310B (if previously disconnected). C446.

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, perform 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 service articles address this concern, INSTALL a new RCM. REFER to: Restraints Control Module (RCM) . GO to AA17

AA13 CHECK THE SECOND ROW DRIVER SEAT SIDE AIRBAG DEPLOYMENT CONTROL RESISTANCE (DEPLOY_16_R) PID (PARAMETER IDENTIFICATION) FOR AN INTERMITTENT LOW RESISTANCE OR OPEN CIRCUIT FAULT

Access the RCM and monitor the DEPLOY_16_R (mOhm) PID

While monitoring the PID, attempt to recreate the fault by wiggling connectors (including any inline connectors) and flexing the wire harness frequently. Record the resistance value indicated by the PID.

Does the PID value read between 1.7 and 2.98 ohms?

Yes	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 AA16

No	DEPOWER the SRS. REFER to: Supplemental Restraint System (SRS) Depowering . REPAIR as necessary. Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information. GO to AA17

AA14 CHECK THE SECOND ROW DRIVER SEAT SIDE AIRBAG DEPLOYMENT CONTROL CIRCUITS FOR AN INTERMITTENT SHORT TO GROUND FAULT

Attempt to recreate the fault by wiggling connectors (including any inline connectors) and flexing the wire harness frequently.

Using a diagnostic scan tool, perform RCM self-test.

Was DTC B140A:11 retrieved on-demand during self-test?

Yes	DEPOWER the SRS and REPAIR as necessary. REFER to: Supplemental Restraint System (SRS) Depowering . Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information. GO to AA17

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 AA16

AA15 CHECK THE SECOND ROW DRIVER SEAT SIDE AIRBAG DEPLOYMENT CONTROL CIRCUITS FOR AN INTERMITTENT SHORT TO BATTERY FAULT

Ignition OFF.

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

Disconnect Second Row Driver Seat Side Airbag (Inline) C446.

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

Ignition ON.

Attempt to recreate the fault by wiggling connectors (including any inline connectors) and flexing the wire harness frequently.

Using a diagnostic scan tool, perform RCM self-test.

Was DTC B140A:12 retrieved on-demand during self-test?

Yes	DEPOWER the SRS and REPAIR as necessary. REFER to: Supplemental Restraint System (SRS) Depowering . Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information. GO to AA17

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 AA16

AA16 CHECK THE HARNESS AND CONNECTORS

Ignition OFF.

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

Disconnect Second Row Driver Seat Side Airbag (Inline) C446.
- Inspect connector(s) (including any inline 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.
- Inspect RCM C310A and C310B Connector Position Assurance (CPA) lever/lock for correct operation.
- Inspect Inline C446 and make sure the Connector Position Assurance (CPA) tabs are not broken and the clip is not damaged.

Were any concerns found?

Yes	REPAIR as necessary. Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information. GO to AA17

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 AA17

AA17 CHECK FOR ADDITIONAL SRS (SUPPLEMENTAL RESTRAINT SYSTEM) DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition OFF.

Connect all previously disconnected SRS components.

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 .

Ignition ON.

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

Using a diagnostic scan tool, perform

Restraints 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 Diagnostic Trouble Code (DTC) Chart

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