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Home >> Hummer >> 2003 >> H2 >> Repair and Diagnosis >> External Pages >> Different car >> Section 162 (Supplemental Inflatable Restraint System) >> Diagnostic Tests >> DTC B0100, B0101, B0102,B0103,B0104, B0105: Driver-Side EFS Valid Identification Message Not Received/NOK Message/Incorrect Identification Message, Passenger-Side EFS Valid Identification Message Not Received/NOK Message/Incorrect Identification Message >> Diagnostic Procedure
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Diagnostic Procedure

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  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 B0104 or B0105 is current, go to step  12. If DTC B0101, B0102, B0104 or B0105 is not current, go to next step.
  3. Turn ignition off. If DTC B0100 is current, disconnect driver-side EFS connector. See ELECTRONIC FRONTAL SENSOR (EFS)  under REMOVAL & INSTALLATION. If DTC B0103 is current, disconnect passenger-side EFS connector. If applicable EFS 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 EFS. Go to step  13. If harness side of connector is damaged, replace connector. See WIRE REPAIR . Go to step  13.
  5. Disconnect SDM connector. See Figure. If SDM connector shows signs of damage or corrosion, replace connector. See WIRE REPAIR . Go to step  13. If SDM terminals show signs of damage or corrosion, go to step  11. If SDM connector and terminals are okay, go to next step.
  6. If DTC B0100 is current, test driver-side EFS signal circuit for a short to ground, high resistance or an open circuit. If DTC B0103 is current, test passenger-side EFS signal circuit for a short to ground, high resistance or an open circuit. If a short to ground, an open or high resistance is found and corrected, go to step  13. If a short to ground, an open or high resistance is not found, go to next step.
  7. If DTC B0100 is current, test driver-side EFS reference circuit for a short to ground, high resistance or an open circuit. If DTC B0103 is current, test passenger-side EFS reference circuit for a short to ground, a high resistance or an open circuit. If a short to ground, an open or high resistance is found and corrected, go to step  13. If a short to ground, an open or high resistance is not found, go to next step.
  8. Turn ignition on. Check for a short to voltage in applicable EFS circuits. If a short to voltage is found and corrected, go to step  13. If a short to voltage is not found, go to next step.
  9. If DTC B0100 was retrieved, replace driver-side EFS. Go to next step. If DTC B0103 was retrieved, replace passenger-side EFS. Go to next step.
  10. 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.
  11. Replace SDM. See SENSING & DIAGNOSTIC MODULE (SDM)  under REMOVAL & INSTALLATION. Go to next step.
  12. For DTC B0101 and B0102, replace driver-side EFS. Go to next step. For DTC B0104 and B0105, replace passenger-side EFS. Go to next step.
  13. 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 step  2. If DTC's are not retrieved, system is normal.
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