Circuit/System Testing
WARNING: This page is about a different car, the 2010 Pontiac G6. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the yaw/lateral accelerometer sensor.
- Test for less than 1 ohm between the low reference circuit terminal 6 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.
- Ignition ON, test for less than 1 volt between the following circuits listed below and ground.
- 5-volt reference circuit terminal 1
- yaw signal circuit terminal 3
- lateral accelerometer signal circuit terminal 2
- yaw frequency circuit terminal 5
- If greater than the specified range, test the appropriate circuit for a short to voltage. If the circuits test normal, replace the EBCM.
- Ignition OFF, test for infinite resistance between the following circuits listed below and ground.
- 5-volt reference circuit terminal 1
- yaw signal circuit terminal 3
- lateral accelerometer signal circuit terminal 2
- yaw frequency circuit terminal 5
- If not the specified value, the appropriate circuit for a short to ground. If the circuit test normal, replace the combination yaw/lateral accelerometer sensor.
- Disconnect the harness connector at the EBCM.
- Test for less than 1 ohm between the following terminals listed below.
- 5-volt reference circuit terminal 1 and 23
- yaw signal circuit terminal 3 and 37
- lateral accelerometer signal circuit terminal 2 and 8
- yaw frequency circuit terminal 5 and 38
- If greater than the specified range, test the appropriate circuit for an open/high resistance. If the circuit test normal, replace the combination yaw/lateral accelerometer sensor.
- If all circuits test normal, replace the EBCM.