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Circuit/System Testing

WARNING: This page is about a different car, the 2007 Pontiac Solstice. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the steering wheel position sensor (SWPS) connector.
  2. Ignition OFF, test for less than 1 ohm of resistance between the low reference circuit and ground.
    • If greater than 1 ohm, test the low reference circuit and the EBCM ground circuit for a short to voltage or an open/high resistance. If the circuits test normal, replace the EBCM.
  3. Test the CAN Hi circuit, CAN Lo circuit, 5 volt reference circuit, and the low reference circuit for an open/high resistance or a short to voltage or ground.
    • If all circuits test normal, replace the SWPS.
    • If the DTC sets again after replacing the SWPS, replace the EBCM.
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