Circuit/System Testing
WARNING: This page is about a different car, the 2007 Buick Lucerne. However, it is still accessible from the selected car via links, so may be relevant.
Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit and ground.
- If less than 4.8 volts, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM.
- If greater than 5.2 volts, test the following circuits for a short to voltage. If all circuits test normal, replace the MSM.
- 5-volt reference circuit
- Each seat and lumbar position sensor signal circuit