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Home >> Pontiac >> 2008 >> Torrent GXP, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 128 (Seat Heating System & Seat Cooling System) >> Diagnostic Information and Procedures >> DTC B2508 or B2509 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the X1 harness connector at the HSM.
  2. Test for infinite resistance between the control circuit terminal 3 and ground.
    • If less than the specified range, test the control circuit for a short to ground.
  3. Test for infinite resistance between the control circuit terminal 6 and ground.
    • If less than the specified range, test the control circuit for a short to ground.
  4. Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal 3 and ground.
    • If the test lamp illuminates, test the control circuit for a short to voltage.
  5. Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal 6 and ground.
    • If the test lamp illuminates, test the control circuit for a short to voltage.
  6. If all circuits test normal, replace the HSM.
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