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Home >> Chevrolet >> 2006 >> Uplander Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 198 (Supplemental Inflatable Restraint System) >> Diagnostic Information and Procedures >> DTC B0074 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2006 Chevrolet Monte Carlo and 2006 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: Important: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.
  • The PPS pressure sensor
  • The PPS module
  • The PPS pressure sensor wiring harness connector
  • The PPS module wiring harness connector
  1. Ignition OFF, inspect the component and harness sides of the connector for the PPS pressure sensor. Verify there is no damage or corrosion is found.
  2. Disconnect the PPS module connector.
  3. Test the PPS sensor signal circuit for a short to ground, a high resistance, or an open. Verify that a short to ground, a high resistance, or an open does not exist.
    • If any of the above conditions are found make the appropriate repair.
  4. Test the PPS sensor low reference circuit for a short to ground, a short to voltage, a high resistance, or an open. Verify that a short to ground, a short to voltage, a high resistance, or an open does not exist.
    • If any of the above conditions are found make the appropriate repair.
  5. Test the PPS sensor 5-volt reference circuit for a short to ground, a short to voltage, a high resistance, or an open. Verify that a short to ground, a short to voltage, a high resistance, or an open does not exist.
    • If any of the above conditions are found make the appropriate repair.
  6. Ignition ON, engine OFF test the PPS sensor signal circuit with a DMM. Measure the voltage of the PPS sensor circuit harness side and ground. The voltage should read .05-4.5 volts.
    • If the voltage is more than 5.0 volts test the PPS sensor signal circuit for a short to voltage. If the circuit tests good replace the PPS.
  7. Reconnect all PPS components. Use the scan tool to clear all PPS DTCs. Rezero the PPS, refer to Passenger Presence System Rezeroing Procedure . Verify DTC B0074 does not exist.
    • If DTC B0074 reset replaced the PPS.
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