Lumbar Support Up/Down Function Does Not Operate
- If diagnostic system check was performed, go to next step. If diagnostic system check was not performed, go to DIAGNOSTIC SYSTEM CHECK .
- Connect scan tool to Data Link Connector (DLC). Using scan tool, select memory seat module inputs. Move lumbar up/down switch up. If scan tool indicates switch action, go to next step. If scan tool does not indicate switch action, go to step 6).
- With memory seat module inputs still selected, move lumbar up/down switch down. If scan tool indicates switch action, go to next step. If scan tool does not indicate switch action, go to step 6).
- Disconnect lumbar up/down motor connector. Connect unpowered test light between lumbar up/down motor harness connector terminal "B" (Tan wire) and ground. Move lumbar up/down switch up. If test light illuminates, go to next step. If test light does not illuminate, go to step 8).
- Connect unpowered test light between lumbar up/down motor harness connector terminal "A" (Purple wire) and ground. Move lumbar up/down switch down. If test light illuminates, go to step 7). If test light does not illuminate, go to step 9).
- Replace left seat switch. Recheck system operation.
- Replace lumbar up/down motor. See REMOVAL & INSTALLATION in POWER SEATS article. Perform DIAGNOSTIC SYSTEM CHECK .
- Repair open in Tan wire between lumbar up/down motor and MSM. Perform DIAGNOSTIC SYSTEM CHECK .
- Repair open in Purple wire between lumbar up/down motor and MSM. Perform DIAGNOSTIC SYSTEM CHECK .