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Home >> Ford >> 2005 >> Focus ZX5 S, Automatic >> Repair and Diagnosis (Single Page) >> Restraints >> Air Bag, SRS >> Supplemental Inflatable Restraint System >> Diagnosis And Testing >> Pinpoint Tests - Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) >> Pinpoint Test BF: DTC C1946 - Driver Seat Track Position Sensor Circuit Open Fault >> Pinpoint Test Bf: DTC C1946 - Driver Seat Track Position Sensor Circuit Open Fault

Pinpoint Test Bf: DTC C1946 - Driver Seat Track Position Sensor Circuit Open Fault

NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough Inspection and Verification before proceeding with the Pinpoint Test.
  1. BF1 CHECK FOR CONTINUOUS AND ON-DEMAND DTCs 
    WARNING: Restraint system diagnostic tools are for service only. Tools must be removed prior to operating the vehicle over the road. Failure to remove restraint system diagnostic tools could result in injury and possible violation of vehicle safety standards.
    WARNING: Never probe the connectors on the air bag module. Doing so can result in air bag deployment, which can result in personal injury.
    WARNING: The safety belt pretensioner is a pyrotechnic device. Always wear safety glasses when repairing an air bag equipped vehicle and when handling a safety belt buckle pretensioner or safety belt retractor pretensioner. Never probe a pretensioner electrical connector. Doing so could result in pretensioner or air bag deployment and could result in personal injury.
    NOTE: After diagnosing or repairing an SRS, the restraint system diagnostic tools must be removed before operating the vehicle over the road. 
    NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
    • Enter the following diagnostic mode on the scan tool: On-Demand Self Test.
    • Enter the following diagnostic mode on the scan tool: Retrieve/Record Continuous DTCs.
    • Was DTC C1946 retrieved during the on-demand self test? 
    • Yes  : This is a hard fault. The fault condition is still present. This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the on-demand self test. GO to  BF2.
    • No  : This is an intermittent fault. The fault condition is not present at this time. GO to  BF5.
  2. BF2 CHECK CIRCUIT 15S-JA53 (GN/BU) AND CIRCUIT 91-JA53 (BK/BU) FOR AN OPEN 
    • Key in OFF position.
    • Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Disconnect: RCM C2041a and C2041b.
    • Disconnect: Driver Seat C311.
    • Measure the resistance between RCM C2041a pin 33, circuit 15S-JA53 (GN/BU), harness side and driver seat C311 pin 7, circuit 15S-JA53 (GN/BU), harness side; and between RCM C2041a pin 34, circuit 91-JA53 (BK/BU), harness side and driver seat C311 pin 8, circuit 91-JA53 (BK/BU), harness side
      Fig 1: Checking Circuit 15S-JA53 (GN/BU) And Circuit 91-JA53 (BK/BU) For An Open
      G03953526Courtesy of FORD MOTOR CO.
    • Are the resistances less than 0.5 ohm? 
    • Yes  : GO to  BF3.
    • No  : REPAIR circuit 15S-JA53 (GN/BU) or 91-JA53 (BK/BU). GO to  BF6.
  3. BF3 CHECK THE SEAT TRACK POSITION SENSOR 
    • Connect: RCM C2041a and C2041b.
    • Install a known good seat track position sensor.
    • Repower the system. Do not  prove out the system at this time. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Enter the following diagnostic mode on the scan tool: On-Demand Self Test.
    • Was DTC C1946 retrieved during the on-demand self test? 
    • Yes  : GO to  BF4.
    • No  : Fault corrected. GO to  BF6.
  4. BF4 CONFIRM THE RCM FAULT 
    NOTE: Make sure all restraint system diagnostic tools, sensor electrical connectors, and the RCM electrical connectors are connected before carrying out the on-demand self test. If not, erroneous DTCs will be recorded.
    • Yes  : INSTALL and CONFIGURE a new RCM. Refer to RESTRAINTS CONTROL MODULE (RCM) . GO to  BF6.
    • No  : CHECK for causes of the intermittent fault. ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition key frequently. REPAIR any intermittent concerns found. GO to  BF6.
  5. BF5 CHECK FOR AN INTERMITTENT FAULT 
    • Key in OFF position.
    • Enter the following diagnostic mode on the scan tool: On-Demand Self Test.
    • Was DTC C1946 retrieved during the on-demand self test? 
    • Yes  : This is a hard fault. The fault condition is now present. This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the on-demand self test. GO to  BF2.
    • No  : CHECK for causes of the intermittent fault. ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition key frequently. REPAIR any intermittent concerns found. GO to  BF6.
  6. BF6 CHECK FOR ADDITIONAL DTCs 
    • refer to the continuous DTCs recorded during Step  BF1.
    • Were any continuous DTCs retrieved during Step BF1? 
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