Diagnostic Fault Information
WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
| Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
|---|---|---|---|---|---|
| B+, MSM Terminal 2 X3 | 2 | 2 | 2 | - | - |
| B+, MSM Terminal 5 X3 | 1 | 1 | 1 | - | - |
| B+, Lumbar Switch | 4 | 1, 2 | 1, 2 | - | - |
| Driver Seat Lumbar Down Switch Signal | 4 | 2 | 2 | - | - |
| Driver Seat Lumbar Up Switch Signal | 4 | 2 | 2 | - | - |
| Driver Seat Lumbar Forward Switch Signal | 4 | 1 | 1 | - | - |
| Driver Seat Lumbar Rearward Switch Signal | 4 | 1 | 1 | - | - |
| Passenger Seat Lumbar Down Switch Signal | 4 | 2 | 2 | - | - |
| Passenger Seat Lumbar Up Switch Signal | 4 | 2 | 2 | - | - |
| Driver Seat Lumbar Motor Forward Control | B3920 02 | B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B1850 5A |
| Driver Seat Lumbar Motor Rearward Control | B3920 02 | B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B1850 5A |
| Driver Seat Lumbar Motor Down Control | B3921 02 | B1340 0B | 2, 3 | B3921 01 | B1340 42, B1340 4B, B1860 5A |
| Driver Seat Lumbar Motor Up Control | B3921 02 | B1340 0B | 2, 3 | B3921 01 | B1340 42, B1340 4B, B1860 5A |
| Passenger Seat Lumbar Motor Down Control | B3921 02 | B1340 0B | 2, 3 | B3921 01 | B1340 42, B1340 4B |
| Passenger Seat Lumbar Motor Up Control | B3921 02 | B1340 0B | 2, 3 | B3921 01 | B1340 42, B1340 4B |
| 1. Driver seat lumbar horizontal motor inoperative 2. Driver and front passenger seat lumbar vertical motor inoperative 3. Lumbar massage inoperative 4. Scan Tool Does Not Communicate with Low Speed GMLAN Device |
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