Circuit/System Testing
WARNING: This page is about a different car, the 2008 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the steering wheel position sensor (SWPS) connector at the EBCM.
- Ignition OFF, test for less than 1 ohm between the low reference circuit terminal 2 and ground.
- If greater than 1 ohm, test the low reference circuit for a short to voltage or an open/high resistance. If the circuits test normal, replace the EBCM.
- Test the signal A circuit, signal B circuit, 5-volt reference circuit terminal 1, and the low reference circuit terminal 2 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.