Circuit/System Testing
WARNING: This page is about a different car, the 2008 Buick Lucerne. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the heated and cooled seat switch.
- Ignition ON, verify that a test lamp illuminates between the reference voltage circuit terminal 1 and ground.
- If the test lamp does not illuminate, test the reference voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the DMM.
- Test for less than 1 volt between the signal circuit terminal 9 and ground.
- If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the DDM.
- Ignition OFF, connect the harness connector at the heated/cooled seat switch.
- Ignition ON, verify the scan tool Driver Door Switch Memory Recall Switches parameter is approximately 2.75 volts while pressing the memory 1 switch.
- If not the specified value, test the signal circuit terminal 9 for a short to ground or an open/high resistance. If the circuit tests normal, perform the Memory Switch component test. If the switch tests normal, replace the DDM.
- Verify the scan tool Memory Recall Switches parameter is approximately 1.75 volts while pressing the memory 2 switch.
- If not the specified value, test or replace the heated/cooled seat switch.
- Verify the scan tool Memory Recall Switches parameter is approximately 1.0 volt while pressing the EXIT switch.
- If not the specified value, test or replace the heated/cooled seat switch.
- If all circuits test normal, replace the MSM.