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Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 369 (Supplemental Restraint System) >> Diagnosis And Testing >> Airbag and Safety Belt Pretensioner Supplemental Restraint System (SRS) >> Pinpoint Tests >> Pinpoint Test I: DTC B0090:11 or B0090:93 >> Pinpoint Test I: DTC B0090:11 Or B0090:93

Pinpoint Test I: DTC B0090:11 Or B0090:93

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WARNING: Do not handle, move or change the original horizontal mounting position of the restraints control module (RCM) while the 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: Use the correct probe adapter(s) from the Flex Probe Kit when taking measurements. Failure to use the correct probe adapter(s) may damage 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 parts catalog to make sure the correct component is being installed. If an incorrect SRS component is installed, 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.
  1. I1 RETRIEVE RCM DTCs 
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self Test - RCM.
    • Was DTC B0090:11 or B0090:93 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 B0090:11, GO to I2.

      For DTC B0090:93, GO to  I5.

    • No  : The fault is intermittent when present as a CMDTC only. GO to  I10.
  2. I2 CHECK THE FRONTAL RESTRAINTS SENSOR DTC 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 fault reported changes, this indicates the RCM is functioning correctly and is not the source of the fault.
  3. I3 CHECK THE 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 the resistance between front impact severity sensor C177-1, circuit VR213 (VT/GN), harness side and ground.
      Fig 1: Measuring Resistance Between Front Impact Severity Sensor C177-1, Circuit VR213 (VT/GN) And Ground
      G06100054Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
    • Yes  : GO to I4.
    • No  : REPAIR circuit VR213 (VT/GN). GO to  I11.
  4. I4 CHECK FOR A SHORT BETWEEN FRONT IMPACT SEVERITY SENSOR CIRCUITS 
    • Measure the resistance between front impact severity sensor C177-1, circuit VR213 (VT/GN), harness side and front impact severity sensor C177-2, circuit RR129 (YE/GY), harness side.
      Fig 2: Measuring Resistance Between Front Impact Severity Sensor C177-1, Circuit VR213 (VT/GN) And C177-2, Circuit RR129 (YE/GY)
      G06063750Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
    • Yes  : GO to  I9.
    • No  : REPAIR circuits VR213 (VT/GN) and RR129 (YE/GY). GO to  I11.
  5. I5 CHECK THE FRONT IMPACT SEVERITY SENSOR AND RCM CONNECTIONS (NO OPERATION INDICATED) 
    • Yes  : GO to I6.
    • No  : Fault corrected. GO to  I11.
  6. I6 CHECK THE FRONT IMPACT SEVERITY SENSOR FEED CIRCUIT FOR A SHORT TO VOLTAGE (NO OPERATION INDICATED) 
    • Yes  : REPAIR circuit VR213 (VT/GN). GO to  I11.
    • No  : GO to I7.
  7. I7 CHECK THE FRONT IMPACT SEVERITY SENSOR CIRCUITS FOR AN OPEN (NO OPERATION INDICATED) 
    • Ignition OFF.
    • Depower the SRS. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Measure the resistance between RCM C310B, harness side and front impact severity sensor C177, harness side using the following chart.
      RCM Circuit Front Impact Severity Sensor
      C310B-27 VR213 (VT/GN) C177-1
      C310B-28 RR129 (YE/GY) C177-2
      Fig 4: Measuring Resistance Between RCM C310B And Front Impact Severity Sensor C177
      G06100057Courtesy of FORD MOTOR CO.
    • Are the resistances less than 0.5 ohm? 
    • Yes  : GO to I8.
    • No  : REPAIR circuit VR213 (VT/GN) or RR129 (YE/GY). GO to  I11.
  8. I8 CHECK THE FRONTAL RESTRAINTS SENSOR DTC FOR A FAULT STATUS CHANGE (NO OPERATION INDICATED) 
    NOTE: This pinpoint test step will attempt to change the fault reported by the RCM by inducing a different fault condition. If the fault reported 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 between front impact severity sensor C177-1, circuit VR213 (VT/GN), harness side and front impact severity sensor C177-2, circuit RR129 (YE/GY), harness side.
      Fig 5: Connecting Fused Jumper Wire Between Front Impact Severity Sensor C177-1, Circuit VR213 (VT/GN) And C177-2, Circuit RR129 (YE/GY)
      G06940157Courtesy of FORD MOTOR CO.
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self Test - RCM.
    • Did the on-demand DTC change from B0090:93 to B0090:11? 
    • Yes  : REMOVE the fused jumper wire and INSTALL a new front impact severity sensor. REFER to FRONT IMPACT SEVERITY SENSOR . GO to  I11.
    • No  : REMOVE the fused jumper wire and GO to I9.
  9. I9 CONFIRM THE RCM FAULT 
    NOTE: Make sure all restraint system components and the RCM electrical connectors are connected before carrying out the self-test. If not, 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 in-line connectors) for pushed-out, 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 CPA lever/lock for correct operation. Refer to RESTRAINTS CONTROL MODULE (RCM) .
      • repair any concerns found. Refer to "OEM Connector Repair Procedures" Article for schematic and connector information.
    • Connect: RCM C310A and C310B.
    • Connect: Front Impact Severity Sensor C177.
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self Test - RCM.
    • Was the original DTC retrieved on-demand during self-test? 
    • Yes  : INSTALL a new RCM. REFER to RESTRAINTS CONTROL MODULE (RCM) . GO to  I11.
    • No  : In the process of diagnosing the fault, the fault condition has become intermittent. Do not install any new SRS components at this time. SRS components should only be installed when directed to do so in the pinpoint test  . GO to I10.
  10. I10 CHECK FOR AN INTERMITTENT FAULT 
    • Ignition OFF.
    • Depower the SRS. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Disconnect: Front Impact Severity Sensor C177.
    • Disconnect: RCM C310A and C310B.
    • Inspect for the following:
      • inspect harness and component connectors for 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 CPA lever/lock for correct operation. Refer to RESTRAINTS CONTROL MODULE (RCM) .
      • repair any concerns found. Refer to "OEM Connector Repair Procedures" Article 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.
    • Enter the following diagnostic mode on the scan tool: Self Test - RCM.
    • Was DTC B0090:11 or B0090:93 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 B0090:11, GO to  I2.

      For DTC B0090:93, GO to  I5.

    • No  : The fault is not present and cannot be recreated at this time. Do not install any new SRS components at this time. SRS components should only be installed when directed to do so in the pinpoint test  . GO to I11.
  11. I11 CHECK FOR ADDITIONAL SRS DTCs 
    • Ignition OFF.
      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.
    • 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.
    • Enter the following diagnostic mode on the scan tool: Self Test - RCM.
    • Are any RCM DTCs retrieved on-demand during self-test? 
    • Yes  : Do not clear any DTCs until all DTCs have been resolved. GO to the DTC CHARTS  for pinpoint test direction.
    • No  : CLEAR all RCM CMDTCs. PROVE OUT the SRS. Repair is complete. RETURN the vehicle to the customer.
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