For circuit and connector information, refer to Wiring Diagrams Cell 46.
Normal Operation and Fault Symptoms
The RCM monitors the left side impact sensor circuits for the following faults:
Open circuit
Short to voltage
Short to Ground
Faulty left side impact sensor
When a fault is detected, the RCM stores DTC B1413:11 or B1413:93 in memory and sends a message to the IPC to illuminate the airbag warning indicator.
DTC Fault Trigger Conditions
Trouble Code
Description
Fault Trigger Conditions
B1413:11
Driver Front Airbag Sensor: Short to Ground
The fault is indicated when the RCM detects a short to ground in the left side impact sensor power supply circuit.
B1413:93
Driver Front Air Bag Sensor: Inoperative
The fault is indicated when the RCM detects a faulty left front impact sensor, a short to voltage in the sensor supply circuit, or an open in the supply or return circuit.
Possible Causes
Wiring, Terminals or Connectors
Left Front Crash Sensor
RCM
Visual Inspection and Preliminary Diagnosis
Inspect the left front crash sensor for damage.
Check the installation and orientation of the left front crash sensor.
Inspect the wiring harness for damage.
Inspect the connectors for loose or damaged terminals.
PINPOINT TEST A: B1413:11 AND B1413:93
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: Do not probe the impact sensor. The impact sensor cannot be tested with a multimeter.
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 B1413:11 or B1413:93 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 B1413:11 GO to A2 For DTC B1413:93 GO to A5
No
This is an intermittent fault when it is present only as a Continuous Memory Diagnostic Trouble Code (CMDTC). GO to A10.
A2 CHECK THE LEFT FRONT SAFING SENSOR DTC (DIAGNOSTIC TROUBLE CODE) FOR CHANGE IN FAULT STATUS (SHORT TO GROUND INDICATED)
Ignition OFF.
De-power the SRS. REFER to: Supplemental Restraint System (SRS) Disabling and Re-enabling (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Left Front Crash Sensor C1465.
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.
Did the on-demand DTC change from B1413:11 to B1413:93?
Yes
INSTALL a new left front crash sensor. REFER TO: Front Crash Sensor (501-20B Supplemental Restraint System, Removal and Installation). GO to A11
No
GO to A3
A3 CHECK THE LEFT (DRIVER SIDE) FRONT CRASH SENSOR SUPPLY CIRCUIT 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
C1465-1
Ground
Is the resistance greater than 10000 Ohms?
Yes
GO to A4
No
REPAIR the circuit. For wiring diagrams and connector information, refer to Wiring Diagrams, Cell 5. GO to A11.
A4 CHECK FOR A SHORT BETWEEN THE LEFT (DRIVER SIDE) FRONT CRASH SENSOR CIRCUITS
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C1465-1
C1465-2
Is the resistance greater than 10000 Ohms?
Yes
GO to A9
No
REPAIR the circuits. For circuit and connector information, refer to Wiring Diagrams Cell 5. GO to A11
A5 CHECK THE LEFT (DRIVER SIDE) FRONT CRASH SENSOR AND RCM (RESTRAINTS CONTROL MODULE) CONNECTIONS (NO OPERATION INDICATED)
Ignition OFF.
De-power the SRS. REFER to: Supplemental Restraint System (SRS) Disabling and Re-enabling (501-20B Supplemental Restraint System, General Procedures).
Inspect the left front crash sensor electrical connector C1465 to make sure it is fully seated and locked. Seat and lock the connector as necessary.
Access the RCM and inspect C310A and C310B to make sure they are fully seated and locked. Seat and lock the connector as necessary.
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 DTC B1413:93 retrieved on demand during the self-test?
Yes
GO to A6
No
The fault is cleared. GO to A11
A6 CHECK THE LEFT (DRIVER SIDE) FRONT CRASH SENSOR SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE (NO OPERATION INDICATED)
Ignition OFF.
De-power the SRS. REFER to: Supplemental Restraint System (SRS) Disabling and Re-enabling (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Left Front Crash Sensor C1465.
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
C1465-1
Ground
Is there voltage present?
Yes
REPAIR the circuit. For wiring diagrams and connector information, refer to Wiring Diagrams, Cell 5. GO to A11.
No
GO to A7
A7 CHECK THE LEFT (DRIVER SIDE) FRONT CRASH SENSOR 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).
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C310A-17
C1465-1
C310A-18
C1465-2
Is the resistance less than 0.5 Ohms?
Yes
GO to A8
No
REPAIR the circuit(s). For circuit and connector information, refer to Wiring Diagrams Cell 5. GO to A11
A8 CHECK THE LEFT FRONT SAFING SENSOR DTC (DIAGNOSTIC TROUBLE CODE) FOR CHANGE IN FAULT STATUS (NO OPERATION INDICATED)
Connect: RCM C310A and C310B.
Connect the fused jumper wire as shown in the illustration: Click to display connectors
Lead 1
Measurement/Action
Lead 2
C1465-1
C1465-2
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.
Did the on-demand DTC change from B1413:93 to B1413:11?
Yes
REMOVE the fusible link and INSTALL a new left front crash sensor. REFER TO: Front Crash Sensor (501-20B Supplemental Restraint System, Removal and Installation). GO to A11
No
REMOVE the fusible link and GO to A9.
A9 CONFIRM 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.
Connect: Left Front Crash Sensor C1465.
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 applies to this concern, INSTALL a new RCM. REFER TO: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation). GO to A11.
No
During diagnosis, the condition became intermittent. Do not install new SRS components while doing this. Install SRS components only if directed by a pinpoint test. GO to A10
A10 CHECK FOR AN INTERMITTENT FAULT
Ignition OFF.
De-power the SRS. REFER to: Supplemental Restraint System (SRS) Disabling and Re-enabling (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Left Front Crash Sensor C1465.
Disconnect: RCM C310A and C310B.
Inspect:
harness and component connectors for loose or spread terminals and loose or corroded wire connections at the terminals.
wiring harness for damage, pinching, cuts or punctures in the wires.
RCM C310A and C310B connector position assurance (CPA) lock for proper operation.
repair any problems found. Refer to Wiring Diagrams Cell 5 for schematic and connector information.
Connect: Left Front Crash Sensor C1465.
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 DTC B1413:11 or B1413:93 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 B1413:11 GO to A2 For DTC B1413:93 GO to A5
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 A11.
Reconnect all SRS components (if previously disconnected).
If previously instructed to disable the SRS, re-enable the SRS. Do not check 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. 
