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Home >> Saturn >> 2002 >> SC2 Automatic, MP6 >> Repair and Diagnosis >> External Pages >> Different car >> Section 18 (Supplemental Inflatable Restraint System) >> Diagnostic Tests >> DTC B0100, B0101, B0102: Front End Discriminating Sensor Valid Identification Message Not Received/NOK Message/Incorrect Identification Message >> Diagnostic Procedure
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Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. If SIR Diagnostic System Check has been performed, go to next step. If SIR Diagnostic System Check has not been performed, go to SIR DIAGNOSTIC SYSTEM CHECK .
  2. Using scan tool, request SIR DTC display. If DTC B0101, B0102 or B0103 is current, go to step  10. If DTC B0100, B0101 or B0102 is not current, go to next step.
  3. Turn ignition off. If DTC B0100 is current, disconnect front end discriminating sensor connector. See FRONT END DISCRIMINATING SENSOR  under REMOVAL & INSTALLATION. If connector shows signs of damage or corrosion, go to next step. If connector is okay, go to step  5.
  4. If component side of connector is damaged, replace front end discriminating sensor. If harness side of connector is damaged, replace connector. See WIRE REPAIR . Go to step  11.
  5. Disconnect SDM connector. See Figure. If SDM connector or terminals show signs of corrosion, poor connections or other damage, go to next step. If SDM connector and terminals are okay, go to step  7.
  6. If SDM connector shows signs of damage or corrosion, replace connector. See WIRE REPAIR . Go to step  11. If SDM terminals show signs of damage or corrosion, go to step  12.
    NOTE: Use Digital Multimeter (J-39200) and Connector Test Adapter Kit (J-35616-A) or Flat Wire Probe Adapter Kit (J-42675) when performing electrical tests.
  7. If DTC B0100 is current, disconnect front end discriminating sensor connector. Check front end discriminating sensor high-side and low-side circuits 1834 and 2260 for an open or high resistance. If an open or high resistance is found and corrected, go to step  11. If an open or high resistance is not found, go to next step.
  8. Check for a short between circuits 1834 and 2260. If a short is found and corrected, go to step  11. If a short is not found, go to next step.
  9. Turn ignition on. Check for a short to voltage in circuits 1834 and 2260. If a short to voltage is found and corrected, go to step  11. If a short to voltage is not found and corrected, go to next step.
  10. Turn ignition off. If DTC B0100, B0101 or B0102 is current, replace front end discriminating sensor. See FRONT END DISCRIMINATING SENSOR  under REMOVAL & INSTALLATION. Go to next step.
  11. Reconnect all SIR components. Using scan tool, clear all SIR DTC's. Road test vehicle, then check for DTC's. If DTC's are retrieved, go to next step. If DTC's are not retrieved, system is normal.
  12. Replace SDM. See SENSING & DIAGNOSTIC MODULE (SDM)  under REMOVAL & INSTALLATION. Go to next step.
  13. Using scan tool, clear all SIR DTC's. Road test vehicle, then check for DTC's. If DTC's are retrieved, go to step  2. If DTC is not retrieved, system is normal.
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