Circuit/System Testing

WARNING: This page is about a different car, the 2008 Pontiac Torrent and 2008 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.

Ignition OFF, disconnect the harness connector at the steering wheel position sensor (SWPS).
Test for less than 1 ohm between the low reference circuit terminal 6 and ground.
- If greater than specified range, test the low reference circuit for an open/high resistance. If the circuits test normal, replace the EBCM.
Disconnect the harness connector at the EBCM.
Ignition ON, test for 0 volts between the communication circuit terminal 19 and ground at the EBCM connector.
- If greater than the specified value, repair the communication circuit for a short to voltage.
Test for 0 volts between the communication circuit terminal 18 and ground.
- If greater than the specified value, repair the communication circuit for a short to voltage.
Ignition OFF, test for infinite resistance between the communication circuit terminal 19 and ground.
- If greater than the specified value, repair the communication circuit for a short to ground.
Ignition OFF, test for infinite resistance between the communication circuit terminal 18 and ground.
- If greater than the specified value, repair the communication circuit for a short to ground.
Test for less than 1 ohm between the communication circuit terminals 19 and terminal 4.
- If greater than the specified range, repair the communication circuit for an open/high resistance.
Test for less than 1 ohm between the communication circuit terminals 18 and terminal 3.
- If greater than the specified range, repair the communication circuit for an open/high resistance.
Test for infinite resistance between the communication circuit 18 and the communication circuit 19.
- If not the specified value, test the communication circuits for a short together.
If all circuits test normal, replace the steering angle sensor.