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Home >> Pontiac >> 2008 >> Torrent Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 81 (Cellular System, Entertainment System & Navigation System) >> Diagnostic Information and Procedures >> DTC B1287 >> 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 X3 harness connector at the audio amplifier.
  2. Ignition ON, radio ON, test for 0.5-1.0 volts between the control circuit terminal 16 and ground.
    • If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
    • If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the radio.
  3. If all circuits test normal, replace the audio amplifier.
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