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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 455 (Supplemental Inflatable Restraint System) >> Diagnostic Tests >> DTC B0083, B0084: Driver Or Passenger SPS Circuit Amperage Out Of Range >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. 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. Turn ignition off. If DTC B0083 is present, disconnect passenger SPS connector, located on front passenger seat outboard seat track. If DTC B0084 is present, disconnect driver SPS connector, located on driver seat outboard seat track. Inspect both sides of applicable connector for corrosion, poor connections or damage. If either half of connector is damaged, go to next step. If both halves of connector are okay, go to step  4.
  3. If SPS terminals are damaged, replace applicable SPS. See SEAT POSITION SWITCH (SPS)  under REMOVAL & INSTALLATION. Go to step  12. If harness side of connector shows signs of corrosion, poor connections or damage, replace applicable connector. See WIRE REPAIR . Go to step  12.
  4. If DTC B0083 is present, disconnect right main seat harness connector, located under passenger front seat. If DTC B0084 is present, disconnect left main seat harness connector, located under driver seat. If either half of connector shows signs of damage, poor connections or corrosion, replace connector. See WIRE REPAIR . Go to step  12. If both halves of connector are okay, go to next step.
  5. Disconnect SDM connector. See Figure. If SDM connector shows signs of corrosion, poor connections or damage, replace connector. See WIRE REPAIR . Go to step  12. If connector is okay, go to next step.
    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.
  6. If DTC B0083 is current, test circuit 5056 for a short to ground, high resistance or an open. If condition is found and corrected, go to step  12. If condition is not found, go to next step. If DTC B0084 is current, test circuit 5055 for a short to ground, high resistance or an open. If condition is found and corrected, go to step  12. If condition is not found, go to next step.
  7. If DTC B0083 is current, test SPS low reference circuit 5017 for a short to ground, high resistance or an open. See WIRE REPAIR . If condition is found and corrected, go to step  12. If condition is not found, go to next step. If DTC B0084 is current, test circuit 5017 for a short to ground, high resistance or an open. See WIRE REPAIR . If condition is found and corrected, go to step  12. If condition is not found, go to next step.
  8. Turn ignition on. If DTC B0083 is current, test circuits 1363 and 5056 for a short to voltage. See WIRE REPAIR . If condition is found and corrected, go to step  12. If condition is not found, go to next step. If DTC B0084 is current, test circuits 1363 and 5055 for a short to voltage. See WIRE REPAIR . If condition is found and corrected, go to step  12. If condition is not found, go to next step.
  9. For DTC B0083, replace passenger SPS. See SEAT POSITION SWITCH (SPS)  under REMOVAL & INSTALLATION. Go to next step. For DTC B0084, replace driver SPS. Go to next step.
  10. Reconnect all SIR components. Using scan tool, clear all DTC's. Road test vehicle. If DTC resets, go to next step. If DTC does not reset, system is okay.
  11. Replace SDM. See SENSING & DIAGNOSTIC MODULE (SDM)  under REMOVAL & INSTALLATION. Go to next step.
  12. Reconnect all SIR components. Ensure all components are properly mounted. Using scan tool, clear all SIR DTC's. Road test vehicle. If DTC resets, go to step  2. If DTC does not reset, system is normal.
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