Circuit/System Testing
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the steering angle sensor.
- Test for less than 1 ohm of resistance between the ground circuit terminal 6 and ground.
- If greater than the specified range, test for an open/high resistance in the ground circuit. If the circuit tests normal, replace the steering angle position sensor.
- Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 5 and ground.
- If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the steering angle position sensor.
- Ignition OFF, disconnect the harness connector at the EBCM, and the yaw rate/accelerometer.
- Ignition ON, test for 0 volts between the steering position sensor communication circuit terminal 2 and ground.
- If greater than the specified value, test the communication circuit for a short to voltage.
- Test for 0 volts between the steering position sensor communication circuit terminal 3 and ground.
- If greater than the specified value, test the communication circuit for a short to voltage.
- Ignition OFF, test for infinite resistance between the steering position sensor communication circuit terminal 2 and ground.
- If not the specified value, test the communication circuit for a short to ground.
- Test for infinite resistance between the steering position sensor communication circuit terminal 3 and ground.
- If not the specified value, test the communication circuit for a short to ground.
- Test for less than 1 ohm of resistance between the steering position sensor communication circuit terminals 2 and terminal 5.
- If greater than the specified range, test the communication circuit for an open/high resistance.
- Test for less than 1 ohm of resistance between the steering position sensor communication circuit terminals 3 and terminal 4.
- If greater than the specified range, test the communication circuit for an open/high resistance.
- Test for infinite resistance between the steering position sensor communication circuit terminal 2 and the communication circuit terminal 3.
- If not the specified value, test the communication circuits for a short together.
- If all circuits test normal, replace the steering angle sensor.