Pinpoint Test A : B0090:11, B0090:81, B0090:93

WARNING: Do not handle, move or change the original horizontal mounting position of the Restraints Control Module (RCM) while the Restraints Control Module (RCM) is connected and the ignition switch is ON. Failure to follow this instruction may result in the accidental deployment of the Safety Canopy® and cause serious personal injury or death.

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 Catalog Advantage™ or equivalent to make sure the correct component is being installed. If an incorrect SRS component is installed, Diagnostic Trouble Codes (DTCs) may set.

NOTE: Do not probe any impact sensor. The impact sensor cannot be tested using a multi-meter

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)
- Ignition ON.
- Using a diagnostic scan tool, perform RCM self-test.
Was DTC B0090:11, B0090:81 or B0090:93 retrieved on-dem and during self-test?
1. Yes: This fault cannot be cleared until it is corrected and the DTC is no longer retrieved on-dem and during self-test. For DTC B0090:11, GO to A2 For DTC B0090:81 or B0090:93, GO to A5
2. No: This is an intermittent fault when present as a Continuous Memory Diagnostic Trouble Code (CMDTC) only. GO to A10
A2 CHECK THE LEFT FRONTAL RESTRAINTS SENSOR 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 and Repowering .
- Disconnect LH Front Impact Severity Sensor C1465.
- Repower the SRS. Do not prove out the SRS at this time.
  REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
- Ignition ON.
- Using a diagnostic scan tool, perform RCM self-test.
Did the on-demand DTC change from B0090:11 to B0090:81?
1. Yes: INSTALL a new LH front impact severity sensor.
  REFER to: Front Impact Severity Sensor .
  
  GO to A11
2. No: GO to A3

A3 CHECK THE LH (LEFT-HAND) FRONT IMPACT SEVERITY SENSOR FEED CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.
Depower the SRS.
REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
Disconnect RCM C310A and C310B.
Measure:

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C1465-1	Ω	-

Is the resistance greater than 10, 000 ohms?

Yes: GO to A4
No: REPAIR the circuit.
Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information.

GO to A11

A4 CHECK FOR A SHORT BETWEEN LH (LEFT-HAND) FRONT IMPACT SEVERITY SENSOR CIRCUITS

Measure:

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C1465-1	Ω	C1465-2

Is the resistance greater than 10, 000 ohms?

Yes: GO to A9
No: REPAIR the circuits.
Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information.

GO to A11

A5 CHECK THE LH (LEFT-HAND) FRONT IMPACT SEVERITY SENSOR AND RCM (RESTRAINTS CONTROL MODULE) CONNECTIONS (INVALID SERIAL DATA RECEIVED OR NO OPERATION INDICATED)
- Ignition OFF.
- Depower the SRS.
  REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
- Inspect the LH Front Impact Severity Sensor electrical connector C1465to make sure it is fully seated and locked. Seat and lock the connector as necessary.
- Gain access to the RCM and inspect C310A and C310B to make sure they are fully seated and locked. Seat and lock the connector as necessary.
  REFER to: Restraints Control Module (RCM) .
- Repower the SRS. Do not prove out the SRS at this time.
  REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
- Ignition ON.
- Using a diagnostic scan tool, perform RCM self-test.
Was DTC B0090:81 or B0090:93 retrieved on-dem and during self-test?
1. Yes: For DTC B0090:93, GO to A6 For DTC B0090:81, GO to A7
2. No: The fault has been corrected. GO to A11

A6 CHECK THE LH (LEFT-HAND) FRONT IMPACT SEVERITY SENSOR FEED CIRCUIT FOR A SHORT TO VOLTAGE (NO OPERATION INDICATED)

Ignition OFF.
Depower the SRS.
REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
Disconnect LH Front Impact Severity Sensor C1465.
Disconnect RCM C310A and C310B.
Repower the SRS. Do not prove out the SRS at this time.
REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
Ignition ON.
Measure:

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C1465-1		-
C1465-2		-

Is any voltage present?

Yes: REPAIR the circuit.
Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information.

GO to A11
No: GO to A8

A7 CHECK THE LH (LEFT-HAND) FRONT IMPACT SEVERITY SENSOR CIRCUITS FOR AN OPEN

Ignition OFF.
Depower the SRS.
REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
Disconnect LH Front Impact Severity Sensor C1465.
Disconnect RCM C310A and C310B.
Measure:

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C310A-14	Ω	C1465-1
C310A-13	Ω	C1465-2

Are the resistances less than 0.5 ohm?

Yes: GO to A8
No: REPAIR the circuit(s).
Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information.

GO to A11

A8 CHECK THE LEFT FRONTAL RESTRAINTS SENSOR DTC (DIAGNOSTIC TROUBLE CODE) FOR A FAULT STATUS CHANGE (INVALID DATA RECEIVED OR NO OPERATION 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.
If not already directed to do so, depower the SRS.
REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
Connect RCM C310A and C310B.
Connect a fused jumper wire as shown:

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C1465-1		C1465-2

Repower the SRS. Do not prove out the SRS at this time.
REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
Ignition ON.
Using a diagnostic scan tool, perform RCM self-test.

Did the on-demand DTC change from B0090:81 or B0090:93 to B0090:11?

Yes: REMOVE the fused jumper wire and INSTALL a new LH front impact severity sensor.
REFER to: Front Impact Severity Sensor .

GO to A11
No: REMOVE the fused jumper wire and GO to A9

A9 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 and Repowering .
- 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.
    REFER to: Restraints Control Module (RCM) .
  - repair any concerns found.
    Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information.
- Connect LH Front Impact Severity Sensor C1465.
- Connect RCM C310A and C310B.
- Repower the SRS. Do not prove out the SRS at this time.
  REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
- Ignition ON.
- Using a diagnostic scan tool, perform RCM self-test.
Was the original DTC retrieved on-dem and during self-test?
1. 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) .
  
  GO to A11
2. 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 A10
A10 CHECK FOR AN INTERMITTENT FAULT
- Ignition OFF.
- Depower the SRS.
  REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
- Disconnect LH Front Impact Severity Sensor C1465.
- Disconnect RCM C310A and C310B.
- Inspect:
  - harness and component connectors for loose or spread terminals and loose or frayed wire connections at terminals.
  - wire harness for any damage, pinched, cut or pierced wires.
  - RCM C310A and C310B Connector Position Assurance (CPA) lever/lock for correct operation.
    REFER to: Restraints Control Module (RCM) .
  - repair any concerns found.
    Refer to OEM 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) Depowering and Repowering .
- Ignition ON.
- Using a diagnostic scan tool, perform RCM self-test.
Was DTC B0090:11, B0090:81 or B0090:93 retrieved on-dem and during the self-test?
1. Yes: This fault cannot be cleared until it is corrected and the DTC is no longer retrieved on-dem and during self-test. For DTC B0090:11, GO to A2 For DTC B0090:81 or B0090:93, GO to A5
2. 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 A11
A11 CHECK FOR ADDITIONAL SRS (SUPPLEMENTAL RESTRAINT SYSTEM) DIAGNOSTIC TROUBLE CODES (DTCS)
WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.
- 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) Depowering and Repowering .
- Ignition ON.
- Using a diagnostic scan tool, perform Restraints self-test.
Are any RCM and/or OCSM Diagnostic Trouble Codes (DTCs) retrieved on-dem and during self-test?
1. Yes: Do not clear any Diagnostic Trouble Codes (DTCs) until all Diagnostic Trouble Codes (DTCs) have been resolved. Refer to RCM DTC CHART or Refer to OCSM DTC CHART for pinpoint test direction.
2. No: CLEAR Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules. PROVE OUT the SRS. The repair is complete. RETURN the vehicle to the customer.