For circuit and connector information, refer to Wiring Diagrams Cell 46.
Normal Operation and Fault Symptoms
The RCM continuously monitors the driver airbag 1st stage circuits for the following malfunctions:
Resistance Out of Range
Unexpected Voltage
Short to Ground
Faulty Driver Airbag
When a malfunction is detected, the RCM stores DTC B0001:11, B0001:12, B0001:13 or B0001:1A in memory and sends a message to the IPC to turn on the airbag indicator.
The RCM analyzes the deployment loop resistance to determine if a malfunction is present. The value displayed in the PID is the deployment loop resistance measured by the RCM. If the displayed value is below or above the desired range (see the chart below), the RCM may set a DTC. As the deployment loop resistance drifts further outside the desired range, the likelihood of a DTC setting increases. Small resistance fluctuations may occur due to the effect of road vibrations on the final seat belt connection. Crimps and terminals may be affected by stress and movement of the seat belt and may cause an increase in resistance due to wire tension. These variables may result in an intermittent fault. For this reason, the test requires the PID value to be within the desired range before the malfunction is considered repaired, regardless of whether the module reports the DTC on demand at the time of diagnosis. Following this direction helps ensure that minor resistance changes do not cause repeated concern. This test uses a process of elimination to diagnose each part of the deployment loop circuit, including:
Wiring
Connections
Clockspring
Driver Airbag
RCM
DTC Fault Trigger Conditions
Trouble Code
Description
Fault Trigger Conditions
B0001:11
Driver Frontal Stage 1 Deployment Control: short to ground
The fault is set when the RCM detects a short to ground on one of the driver airbag first stage circuits for approximately 6 seconds.
B0001:12
Driver Frontal Stage 1 Deployment Control: Short to Battery
The fault is set when the RCM detects a short to voltage on one of the driver airbag first stage circuits for approximately 6 seconds.
B0001:13
Driver Frontal Stage 1 Deployment Control: open circuit
The fault is set when the RCM measures a resistance greater than the desired range between the driver airbag first stage circuits for approximately 6 seconds.
The fault is set when the RCM measures a resistance less than the desired range between the driver airbag first stage circuits for approximately 6 seconds.
Possible Causes
Wiring, Terminals or Connectors
Clockspring
Driver Airbag
RCM
Visual Inspection and Preliminary Diagnosis
Inspect the wiring harness for damage.
Inspect the connectors for loose or damaged terminals.
PINPOINT TEST A: DTCs B0001:11, B0001:12, B0001:13 AND B0001:1A
NOTE: Most concerns are related to connector and/or wiring issues. Perform a thorough inspection and check before proceeding to the Pinpoint Test.
NOTE: Only disconnect or reconnect SRS components when instructed to do so in the Pinpoint Test step. Failure to follow this instruction may result in an incorrect SRS diagnosis.
NOTE: Always verify the correct SRS component is installed. Parts released for other vehicles may be incompatible even if they appear physically similar. Check the part number listed in the Ford parts catalog to confirm the correct component is installed. If an incorrect SRS component is installed, diagnostic trouble codes (DTCs) may be set.
NOTE: Before returning the vehicle to the customer, the SRS must be fully functional and operating correctly.
A1 REMOVE RCM (RESTRAINTS CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
WARNING: Before starting any service procedure in this section, refer to the Safety Warnings in Section 100-00 General Information. Failure to follow this instruction may result in serious personal injury. REFER TO: Pyrotechnic Device Handling Precautions (100-00 General Information, Description and Operation).
The ignition is on.
Using the diagnostic scanner, perform the RCM self-test.
Was DTC B0001:11, B0001:12, B0001:13 or B0001:1A retrieved on demand during the self-test?
Yes
This fault cannot be cleared until it is repaired and the DTC is no longer retrieved on demand during the self-test. For DTC B0001:13 or B0001:1A, GO to A2. For DTC B0001:11, GO to A12. For DTC B0001:12, GO to A15.
No
This is an intermittent fault if it is only present as a continuous memory diagnostic trouble code (CMDTC). For DTC B0001:13 or B0001:1A, GO to A20. For DTC B0001:11, GO to A21. For DTC B0001:12, GO to A22.
A2 CHECK DRIVER FRONT DEPLOY_00_R CIRCUIT RESISTANCE (PID MONITOR)
Using the diagnostic scan tool, view the RCM parameter identification (PID) data.
Monitor and record the resistance value displayed by the DEPLOY_00_R PID.
Is the PID value between 1.62 and 4.46 ohms?
Yes
GO to A19.
No
GO to A3
A3 CHECK DRIVER FRONT STAGE 1 DEPLOY CONTROL RESISTANCE (DEPLOY_00_R) PID (PID MONITOR) DURING HARNESS CHECK
Remove the steering column shrouds to access the clockspring connectors. REFER TO: Steering Column Shrouds (501-05 Interior Trim and Ornamentation, Removal and Installation).
While monitoring the DEPLOY_00_R PID, perform a wiggle test of the driver airbag circuit wiring harness and accessible connectors (including any in-line connectors) by flexing and moving the harness and connectors, and tilting and turning the steering wheel often. Record the resistance value displayed by the PID.
Is the DEPLOY_00_R PID value between 1.62 and 4.46 ohms during the wiring harness check?
Yes
Disconnect the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Rearming (501-20B Supplemental Restraint System, General Procedures). REPAIR the connector, terminals or wiring harness, or INSTALL a new clockspring as necessary. REFER TO: Clockspring (501-20B Supplemental Restraint System, Removal and Installation). Refer to Wiring Diagrams Cell 5 for circuit and connector information. GO to A24.
No
If the PID value is less than 1.62 ohms, GO to A4. If the PID value is greater than 4.46 ohms, GO to A8.
A4 CHECK DRIVER FRONT STAGE 1 DEPLOY CONTROL DTC TO CHANGE FAULT STATUS (LOW RESISTANCE INDICATED)
Ignition OFF.
De-power the SRS. REFER to: Supplemental Restraint System (SRS) Disabling and Re-enabling (501-20B Supplemental Restraint System, General Procedures).
Remove the driver air bag. REFER to: Driver Air Bag (501-20B Supplemental Restraint System, Removal and Installation).
Reset the SRS. Do not check the SRS at this time. REFER TO: Supplemental Restraint System (SRS) Disarming and Rearming (501-20B Supplemental Restraint System, General Procedures).
The ignition is on.
Using the diagnostic scanner, perform the RCM self-test.
DIAGNOSTIC TIP: When viewing Diagnostic Trouble Codes (DTCs) with the driver air bag disconnected, an open circuit fault is typically retrieved in steps 1 and 2.
Did the on-demand DTC change from B0001:1A to B0001:13?
Yes
GO to A17
No
GO to A5
A5 CHECK DRIVER FRONT STAGE 1 DELAY CONTROL DTC TO CHANGE FAULT STATUS (LOW RESISTANCE INDICATED) (CLOCKSPRING DISCONNECTED)
Ignition OFF.
De-power the SRS. REFER to: Supplemental Restraint System (SRS) Disabling and Re-enabling (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Clockspring C218A.
Reset the SRS. Do not check the SRS at this time. REFER TO: Supplemental Restraint System (SRS) Disarming and Rearming (501-20B Supplemental Restraint System, General Procedures).
The ignition is on.
Using the diagnostic scanner, perform the RCM self-test.
DIAGNOSTIC TIP: When viewing Diagnostic Trouble Codes (DTCs) with the clockspring disconnected, an open circuit fault is typically retrieved in steps 1 and 2.
Did the on-demand DTC change from B0001:1A to B0001:13?
Yes
GO to A18
No
GO to A6
A6 CHECK FOR A SHORT TO GROUND BETWEEN DRIVER AIR BAG CIRCUITS, STAGE 1
Ignition OFF.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C218A-2
C218A-1
Is the resistance greater than 10000 Ohms?
Yes
GO to A19.
No
GO to A7
A7 CHECK THE RCM (RESTRAINTS CONTROL MODULE) FOR LOW RESISTANCE
De-power the SRS. REFER to: Supplemental Restraint System (SRS) Disabling and Re-enabling (501-20B Supplemental Restraint System, General Procedures).
Disconnect: RCM C310A and C310B.
Action:
Positive lead
Measurement/Action
Negative lead
C310A, pin 29, component side
C310A, pin 30, component side
Is the resistance greater than 10000 Ohms?
Yes
REPAIR the driver air bag stage 1 circuit(s) for a short circuit. For wiring diagrams and connector information, refer to Wiring Diagrams Cell 5. GO to A24.
No
GO to A19.
A8 CHECK THE DRIVER AIR BAG STAGE 1 CIRCUITS FOR AN OPEN
Ignition OFF.
De-power the SRS. REFER to: Supplemental Restraint System (SRS) Disabling and Re-enabling (501-20B Supplemental Restraint System, General Procedures).
Remove the driver air bag. REFER to: Driver Air Bag (501-20B Supplemental Restraint System, Removal and Installation).
Disconnect: RCM C310A and C310B.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C310A-29
C216A-1
C310A-30
C216A-2
Is the resistance less than 1 Ohm?
Yes
GO to A10
No
GO to A9
A9 CHECK THE DRIVER AIR BAG STAGE 1 CIRCUITS FOR AN OPEN (CLOCKSPRING DISCONNECTED)
Disconnect: Clockspring C218A.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C310A-29
C218A-2
C310A-30
C218A-1
Is the resistance less than 0.5 Ohms?
Yes
GO to A18
No
REPAIR the circuit(s). Refer to Wiring Diagrams Cell 5 for schematic and connector information. GO to A24
A10 CHECK THE DRIVER AIR BAG SRS CIRCUIT MONITOR DTC, STAGE 1 (DIAGNOSTIC TROUBLE CODE) TO CHANGE FAULT CONDITION (INDICATES OPEN)
Connect: RCM C310A and C310B.
Connect a fused jumper wire: Click to display connectors
Lead 1
Measurement/Action
Lead 2
C216A-1
C216A-2
Reset the SRS. Do not check the SRS at this time. REFER TO: Supplemental Restraint System (SRS) Disarming and Rearming (501-20B Supplemental Restraint System, General Procedures).
The ignition is on.
Using the diagnostic scanner, perform the RCM self-test.
DIAGNOSTIC TIP: When viewing diagnostic trouble codes (DTCs) for a short between the driver airbag first stage circuits together, a low resistance fault is typically detected in Step 1. Step 2 shows an open circuit because the driver airbag has been disconnected.
Was DTC B0001:1A retrieved on demand during the self-test?
Yes
REMOVE the fusible link and GO to A17.
No
REMOVE the fusible link and GO to A11.
A11 CHECK THE DRIVER AIR BAG SRS CIRCUIT MONITOR DTC, STAGE 1 (DIAGNOSTIC TROUBLE CODE) TO CHANGE FAULT CONDITION (INDICATES OPEN)
Ignition OFF.
De-power the SRS. REFER to: Supplemental Restraint System (SRS) Disabling and Re-enabling (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Clockspring C218A
Connect a fused jumper wire: Click to display connectors
Lead 1
Measurement/Action
Lead 2
C218A-1
C218A-2
Reset the SRS. Do not check the SRS at this time. REFER TO: Supplemental Restraint System (SRS) Disarming and Rearming (501-20B Supplemental Restraint System, General Procedures).
The ignition is on.
Using the diagnostic scanner, perform the RCM self-test.
DIAGNOSTIC TIP: When viewing diagnostic trouble codes (DTCs) for a short between the driver airbag first stage circuits together, a low resistance fault is typically detected in Step 1. Step 2 shows an open circuit because the driver airbag has been disconnected.
Was DTC B0001:1A retrieved on demand during the self-test?
Yes
REMOVE the fusible link and GO to A18.
No
REMOVE the fusible link and GO to A19.
A12 CHECK THE DRIVER FRONT SRS CIRCUIT MONITOR DTC, STAGE 1 (DIAGNOSTIC TROUBLE CODE) TO CHANGE FAULT CONDITION (INDICATES SHORT TO GROUND)
Ignition OFF.
De-power the SRS. REFER to: Supplemental Restraint System (SRS) Disabling and Re-enabling (501-20B Supplemental Restraint System, General Procedures).
Remove the driver air bag. REFER to: Driver Air Bag (501-20B Supplemental Restraint System, Removal and Installation).
Reset the SRS. Do not check the SRS at this time. REFER TO: Supplemental Restraint System (SRS) Disarming and Rearming (501-20B Supplemental Restraint System, General Procedures).
The ignition is on.
Using the diagnostic scanner, perform the RCM self-test.
DIAGNOSTIC TIP: When viewing Diagnostic Trouble Codes (DTCs) with the driver air bag disconnected, an open circuit fault is typically retrieved in steps 1 and 2.
Did the on-demand DTC change from B0001:11 to B0001:13?
Yes
GO to A17
No
GO to A13
A13 CHECK THE DRIVER FRONT SRS CIRCUIT MONITOR DTC, STAGE 1 (DIAGNOSTIC TROUBLE CODE) TO CHANGE FAULT CONDITION (INDICATES SHORT TO GROUND) (CLOCKSPRING DISCONNECTED)
Ignition OFF.
Disconnect: Clockspring C218A.
Remove the steering column shrouds to access the clockspring connectors. REFER TO: Steering Column Shrouds (501-05 Interior Trim and Ornamentation, Removal and Installation).
The ignition is on.
Using the diagnostic scanner, perform the RCM self-test.
DIAGNOSTIC TIP: When viewing Diagnostic Trouble Codes (DTCs) with the clockspring disconnected, an open circuit fault is typically retrieved in steps 1 and 2.
Did the on-demand DTC change from B0001:11 to B0001:13?
Yes
GO to A18
No
GO to A14
A14 CHECK THE DRIVER AIR BAG SRS CIRCUITS, STAGE 1, FOR A SHORT TO GROUND
Ignition OFF.
De-power the SRS. REFER to: Supplemental Restraint System (SRS) Disabling and Re-enabling (501-20B Supplemental Restraint System, General Procedures).
Disconnect: RCM C310A and C310B.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C218A-1
Ground
C218A-2
Ground
Is the resistance greater than 10000 ohms?
Yes
GO to A19.
No
Due to a jumper in the RCM electrical connector, the fault may be in any circuit. Do not remove or repair the short circuit bar. REPAIR the circuit(s). Refer to Wiring Diagrams Cell 5 for schematic and connector information. GO to A24
A15 CHECK THE DRIVER FRONT SRS CIRCUIT MONITOR DTC, STAGE 1 (DIAGNOSTIC TROUBLE CODE) TO CHANGE FAULT CONDITION (INDICATES SHORT TO BATTERY) (CLOCKSPRING DISCONNECTED)
Ignition OFF.
De-power the SRS. REFER to: Supplemental Restraint System (SRS) Disabling and Re-enabling (501-20B Supplemental Restraint System, General Procedures).
Remove the driver air bag. REFER to: Driver Air Bag (501-20B Supplemental Restraint System, Removal and Installation).
Disconnect: Clockspring C218A.
Remove the steering column shrouds to access the clockspring connectors. REFER TO: Steering Column Shrouds (501-05 Interior Trim and Ornamentation, Removal and Installation).
Reset the SRS. Do not check the SRS at this time. REFER TO: Supplemental Restraint System (SRS) Disarming and Rearming (501-20B Supplemental Restraint System, General Procedures).
The ignition is on.
Using the diagnostic scanner, perform the RCM self-test.
DIAGNOSTIC TIP: When viewing Diagnostic Trouble Codes (DTCs) with the clockspring disconnected, an open circuit fault is typically retrieved in steps 1 and 2.
Did the on-demand DTC change from B0001:12 to B0001:13?
Yes
GO to A18
No
GO to A16
A16 CHECK THE DRIVER AIR BAG SRS CIRCUITS, STAGE 1, FOR A SHORT TO VOLTAGE
Ignition OFF.
De-power the SRS. REFER to: Supplemental Restraint System (SRS) Disabling and Re-enabling (501-20B Supplemental Restraint System, General Procedures).
Disconnect RCM C310A and C310B.
Reset the SRS. Do not check the SRS at this time. REFER TO: Supplemental Restraint System (SRS) Disarming and Rearming (501-20B Supplemental Restraint System, General Procedures).
The ignition is on.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C218A-1
Ground
C218A-2
Ground
Is there voltage present?
Yes
Due to a jumper in the RCM electrical connector, the fault may be in any circuit. Do not remove or repair the short circuit bar. REPAIR the circuit(s). Refer to Wiring Diagrams Cell 5 for schematic and connector information. GO to A24
No
GO to A19.
A17 CONFIRM THE DRIVER AIR BAG SRS FAULT
Ignition OFF.
De-power the SRS. REFER to: Supplemental Restraint System (SRS) Disabling and Re-enabling (501-20B Supplemental Restraint System, General Procedures).
Before reconnecting any previously disconnected SRS component:
inspect the connector(s) (including any integral connectors) for pushed-out, loose or spread terminals, and loose or chafed wire connections at the terminals.
inspect the wiring harness for damage, pinching, or cut or pierced wires.
check the RCM C310A and C310B connector position assurance (CPA) lever/latch for proper operation.
repair any problems found. Refer to Wiring Diagrams Cell 5 for schematic and connector information.
Install the driver air bag. Refer to: Driver Air Bag (501-20B Supplemental Restraint System, Removal and Installation).
Reset the SRS. Do not check the SRS at this time. REFER TO: Supplemental Restraint System (SRS) Disarming and Rearming (501-20B Supplemental Restraint System, General Procedures).
The ignition is on.
Using the diagnostic scanner, perform the RCM self-test.
Was the original DTC retrieved on demand during the self-test?
Yes
INSTALL a new driver air bag. Refer to: Driver Air Bag (501-20B Supplemental Restraint System, Removal and Installation). GO to A24
No
The condition became intermittent during fault diagnosis. Do not install any new SRS components at this time. Install SRS components only when directed by a pinpoint test. For DTC B0001:13 or B0001:1A, GO to A20. For DTC B0001:11, GO to A21. For DTC B0001:12, GO to A22.
A18 CONFIRM THE CLOCKSPRING FAULT
Ignition OFF.
De-power the SRS. REFER to: Supplemental Restraint System (SRS) Disabling and Re-enabling (501-20B Supplemental Restraint System, General Procedures).
Before reconnecting any previously disconnected SRS component:
inspect the connector(s) (including any integral connectors) for pushed-out, loose or spread terminals, and loose or chafed wire connections at the terminals.
inspect the wiring harness for damage, pinching, or cut or pierced wires.
check the RCM C310A and C310B connector position assurance (CPA) lever/latch for proper operation.
repair any problems found. Refer to Wiring Diagrams Cell 5 for schematic and connector information.
Connect: Clockspring C218A.
Install the driver air bag. Refer to: Driver Air Bag (501-20B Supplemental Restraint System, Removal and Installation).
Reset the SRS. Do not check the SRS at this time. REFER TO: Supplemental Restraint System (SRS) Disarming and Rearming (501-20B Supplemental Restraint System, General Procedures).
The ignition is on.
Using the diagnostic scanner, perform the RCM self-test.
Was the original DTC retrieved on demand during the self-test?
Yes
INSTALL a new clockspring. Refer to: Clockspring (501-20B Supplemental Restraint System, Removal and Installation). GO to A24
No
The condition became intermittent during fault diagnosis. Do not install any new SRS components at this time. Install SRS components only when directed by a pinpoint test. For DTC B0001:13 or B0001:1A, GO to A20. For DTC B0001:11, GO to A21. For DTC B0001:12, GO to A22.
A19 CONFIRM THE RCM (RESTRAINTS CONTROL MODULE) FAULT
Ignition OFF.
De-power the SRS. REFER to: Supplemental Restraint System (SRS) Disabling and Re-enabling (501-20B Supplemental Restraint System, General Procedures).
Before reconnecting any previously disconnected SRS component:
inspect the connector(s) (including any integral connectors) for pushed-out, loose or spread terminals, and loose or chafed wire connections at the terminals.
inspect the wiring harness for damage, pinching, or cut or pierced wires.
check the RCM C310A and C310B connector position assurance (CPA) lever/latch for proper operation.
repair any problems found. Refer to Wiring Diagrams Cell 5 for schematic and connector information.
If previously removed, install the driver airbag. REFER TO: Driver Airbag (501-20B Supplemental Restraint System, Removal and Installation).
Connect: Clockspring C218A.
Connect: RCM C310A and C310B.
Reset the SRS. Do not check the SRS at this time. REFER TO: Supplemental Restraint System (SRS) Disarming and Rearming (501-20B Supplemental Restraint System, General Procedures).
The ignition is on.
Using the diagnostic scanner, perform the RCM self-test.
Was the original DTC retrieved on demand during the self-test?
Yes
CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB addresses this concern, INSTALL a new RCM. REFER TO: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation). GO to A24.
No
The condition became intermittent during fault diagnosis. Do not install any new SRS components at this time. Install SRS components only when directed by a pinpoint test. For DTC B0001:13 or B0001:1A, GO to A20. For DTC B0001:11, GO to A21. For DTC B0001:12, GO to A22.
A20 CHECK THE DRIVER FRONT SRS CIRCUIT MONITOR RESISTANCE, STAGE 1 (DEPLOY_00_R) PID (PARAMETER IDENTIFICATION) FOR AN INTERMITTENT LOW RESISTANCE OR OPEN CIRCUIT
Using the diagnostic scan tool, view the RCM parameter identification (PID) data.
Remove the steering column shrouds to access the clockspring connectors. REFER TO: Steering Column Shrouds (501-05 Interior Trim and Ornamentation, Removal and Installation).
While monitoring DEPLOY_00_R PID, attempt to recreate the fault by wiggling the connectors (including any inline connectors) and flexing the wiring harness, tilting and turning the steering wheel often. Record the resistance value shown by the PID.
Is the PID value between 1.62 and 4.46 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 by a pinpoint test. GO to A23
No
If the driver air bag PID shows an incorrect resistance only when turning the steering wheel, INSTALL a new clockspring. REFER TO: Clockspring (501-20B Supplemental Restraint System, Removal and Installation). For all other faults, DISABLE the SRS and REPAIR as necessary. For circuit and connector information, refer to Wiring Diagrams, Cell 5. GO to A24
A21 CHECK THE DRIVER STAGE 1 DEPLOYMENT CONTROL CIRCUITS FOR A CONTINUOUS SHORT TO GROUND
Remove the steering column shrouds to access the clockspring connectors. REFER TO: Steering Column Shrouds (501-05 Interior Trim and Ornamentation, Removal and Installation).
The ignition is on.
Attempt to recreate the fault by wiggling the connectors (including any inline connectors) and flexing the wiring harness, tilting and turning the steering wheel frequently.
Using the diagnostic scanner, perform the RCM self-test.
Was DTC B0001:11 retrieved on demand during the self-test?
Yes
DISABLE the SRS and REPAIR as necessary. For circuit and connector information, refer to Wiring Diagrams, Cell 5. GO to A24
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 by a pinpoint test. GO to A23
A22 CHECK THE DRIVER FRONT STAGE 1 DEPLOYMENT CONTROL CIRCUITS FOR A CONTINUOUS SHORT TO BATTERY
Ignition OFF.
De-power the SRS. REFER to: Supplemental Restraint System (SRS) Disabling and Re-enabling (501-20B Supplemental Restraint System, General Procedures).
Remove the driver air bag. REFER to: Driver Air Bag (501-20B Supplemental Restraint System, Removal and Installation).
Reset the SRS. Do not check the SRS at this time. REFER TO: Supplemental Restraint System (SRS) Disarming and Rearming (501-20B Supplemental Restraint System, General Procedures).
Remove the steering column shrouds to access the clockspring connectors. REFER TO: Steering Column Shrouds (501-05 Interior Trim and Ornamentation, Removal and Installation).
The ignition is on.
Attempt to recreate the fault by wiggling the connectors (including any inline connectors) and flexing the wiring harness, tilting and turning the steering wheel frequently.
Using the diagnostic scanner, perform the RCM self-test.
Was DTC B0001:12 retrieved on demand during the self-test?
Yes
DISABLE the SRS and REPAIR as necessary. For circuit and connector information, refer to Wiring Diagrams, Cell 5. GO to A24
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 by a pinpoint test. GO to A23
A23 CHECK THE WIRING HARNESS AND CONNECTORS
Ignition OFF.
De-power the SRS. REFER to: Supplemental Restraint System (SRS) Disabling and Re-enabling (501-20B Supplemental Restraint System, General Procedures).
Remove the driver air bag. REFER TO: Driver Air Bag (501-20B Supplemental Restraint System, Removal and Installation).
Inspect the connector(s) (including any inline connectors) for corrosion, loose or spread terminals, and loose or worn wire-to-terminal connections.
Inspect the wiring harness for damage, pinching, cuts or punctures in the wires.
check the RCM C310A and C310B connector position assurance (CPA) lever/latch for proper operation.
Were any concerns found?
Yes
REPAIR as necessary. Refer to Wiring Diagrams Cell 5 for schematic and connector information. GO to A24
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 by the pinpoint test. GO to A24
Reconnect all SRS components (if previously disconnected).
If the SRS was previously disabled, re-enable the SRS. Do not confirm the SRS at this time. REFER TO: Supplemental Restraint System (SRS) Disabling and Arming (501-20B Supplemental Restraint System, General Procedures).
The ignition is on.
NOTE: When Restraints is selected in the Self Test menu, DTCs are retrieved from the RCM and OCSM. Using the diagnostic scanner, perform the Restraints Self Test.
Are any RCM and/or OCSM Diagnostic Trouble Codes (DTCs) retrieved on demand during the self-test?
Yes
Do not clear any Diagnostic Trouble Codes (DTCs) until all DTCs have been resolved. DIAGNOSE and REPAIR the RCM and/or OCSM DTCs. REFER TO: Supplemental Restraint System (SRS) (501-20 Supplemental Restraint System).
No
CLEAR the Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules. CONFIRM the SRS. Repair is complete. RETURN the vehicle to the customer.
?
Test yourself
A quick Ford Fiesta quiz: every answer comes with an explanation and a link to the manual page.
WARNING: Before starting any service procedure in this section, refer to the Safety Warnings in Section 100-00 General Information. Failure to follow this instruction may result in serious personal injury. 
C310A, pin 29, component side
