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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 AL: DTC B2228 - Air Bag Driver Circuit Short to Ground Loop #2 Fault >> Pinpoint Test Al: DTC B2228 - Air Bag Driver Circuit Short To Ground Loop #2 Fault

Pinpoint Test Al: DTC B2228 - Air Bag Driver Circuit Short To Ground Loop #2 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. AL1 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 B2228 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  AL2.
    • No  : This is an intermittent fault. The fault condition is not present at this time. GO to  AL6.
  2. AL2 CHECK THE DRIVER AIR BAG MODULE 
    • 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  AL3.
    • No  : INSTALL a new driver air bag module. Refer to DRIVER AIR BAG MODULE . GO to  AL7.
  3. AL3 CHECK CIRCUIT 15S-JA48 (GN/BK) AND CIRCUIT 91S-JA48 (BK/GN) FOR A SHORT TO GROUND BETWEEN THE RCM AND THE DRIVER AIR BAG MODULE 
    • Key in OFF position.
    • Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Disconnect: RCM C2041a and C2041b.
    • Disconnect: Driver Air Bag Module Restraint System Diagnostic Tool From Driver Air Bag Module Electrical Connector.
      • CAUTION: Take care not to damage the pins when probing the clockspring.
      Fig 1: Checking Circuit 15S-JA48 (GN/BK) And Circuit 91S-JA48 (BK/GN) For A Short To Ground Between RCM And Driver Air Bag Module
      G03953482Courtesy of FORD MOTOR CO.
    • Measure the resistance between driver air bag module electrical connector pin 6, circuit 15S-JA48 (GN/BK), clockspring side and ground; and between driver air bag module electrical connector pin 5, circuit 91S-JA48 (BK/GN), clockspring side and ground.
    • Are the resistances greater than 1,000,000 ohms? 
    • Yes  : GO to  AL5.
    • No  : GO to  AL4.
  4. AL4 CHECK CIRCUIT 15S-JA48 (GN/BK) AND CIRCUIT 91S-JA48 (BK/GN) FOR A SHORT TO GROUND BETWEEN THE RCM AND THE CLOCKSPRING 
    • Disconnect: Clockspring C2274.
    • Measure the resistance between clockspring C2274 pin 1, circuit 15S-JA48 (GN/BK), harness side and ground; and between clockspring C2274 pin 2, circuit 91S-JA48 (BK/GN), harness side and ground.
      Fig 2: Checking Circuit 15S-JA48 (GN/BK) And Circuit 91S-JA48 (BK/GN) For A Short To Ground Between RCM And Clockspring
      G03953483Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 1,000,000 ohms? 
    • Yes  : INSTALL a new clockspring. Refer to CLOCKSPRING . GO to  AL7.
    • No  : REPAIR circuit 15S-JA48 (GN/BK) or circuit 91S-JA48 (BK/GN). GO to  AL7.
  5. AL5 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
    • Connect: Restraint System Diagnostic Tool 501-110 to Driver Air Bag Module Electrical Connector.
    • Connect: RCM C2041a and C2041b.
    • 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 B2228 retrieved during the on-demand self test? 
    • Yes  : INSTALL and CONFIGURE a new RCM. Refer to RESTRAINTS CONTROL MODULE (RCM) . GO to  AL7.
    • 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  AL7.
  6. AL6 CHECK FOR AN INTERMITTENT FAULT 
    • 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.

      CHECK for causes of the intermittent fault at or near the affected air bag module connector. REPAIR any intermittent concerns found.

      If an intermittent concern was  found and repaired, GO to  AL7.

      If an intermittent concern was not  found and repaired, GO to  AL3.

    • 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  AL7.
  7. AL7 CHECK FOR ADDITIONAL DTCs 
    • Refer to the continuous DTCs recorded during Step  AL1
    • Were any continuous DTCs retrieved during Step   AL1 ? 
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