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Home >> Chevrolet >> 2010 >> HHR LS, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays & Gauges >> Diagnostic Information and Procedures >> Boost Gauge Malfunction >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the boost gauge.
  2. Ignition OFF, test for less than 1 ohm of resistance between the boost gauge ground circuit terminal D and ground.
    • If greater than the specified range, test the circuit for a short to battery or open/high resistance.
  3. Ignition ON, verify a test lamp illuminates when connected between the boost gauge B+ circuit terminal A and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
  4. Ignition OFF, connect the harness connector at the boost gauge.
  5. Ignition ON, verify that the boost gauge performs a self test by the gauge dial moving up to the 0 kPa (0 psi) marker.
    • If the boost gauge does not perform a self test, test the boost gauge signal circuit terminal C for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
  6. If all circuits test normal, replace the boost gauge.
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