Diagnostic Fault Information
WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Lumbar Support Inoperative (w/Memory-A45)
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| Lumbar Up Switch Signal | 2 | 1 | 1 | - |
| Lumbar Down Switch Signal | 2 | 1 | 1 | - |
| Lumbar Forward Switch Signal | 2 | 1 | 1 | - |
| Lumbar Rearward Switch Signal | 2 | 1 | 1 | - |
| Driver Seat Lumbar Motor Down Control | B3920 02 | 1 | B3920 01 | B1860 5A |
| Driver Seat Lumbar Motor Up Control | B3920 02 | 1 | B3920 01 | B1860 5A |
| Driver Seat Lumbar Motor Forward Control | B3920 02 | 1 | B3920 01 | B1850 5A |
| Driver Seat Lumbar Motor Rearward Control | B3920 02 | 1 | B3920 01 | B1850 5A |
| 1. Lumbar Support Inoperative with Memory-A45 2. Scan Tool Does Not Communicate with Low Speed GMLAN Device |
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