Left Lumbar Support Does Not Manually Move In One Direction
- If diagnostic system check was performed, go to next step. If diagnostic system check was not performed, go to DIAGNOSTIC SYSTEM CHECK .
- Turn ignition off. Enter Mode 1 Diagnostics by grounding MSM diagnostic connector, located under left seat (connector must remain grounded throughout test). MSM should beep once to confirm that Mode 1 Diagnostics has been entered. While in Mode 1 Diagnostics, all seat and recliner movements are disabled. If one beep was heard, go to next step. If one beep was not heard, go to step 7).
- Move left lumbar switch to inoperative position. If MSM beeps once when switch is moved to inoperative position, go to step 8). If MSM does not beep once when switch is moved to inoperative position, go to next step.
- Disconnect left lumbar switch connector. Move left lumbar switch to inoperative position. Using DVOM, check resistance between ground and appropriate left lumbar switch terminal (switch-side). See WIRING DIAGRAMS . If resistance is less than 5 ohms, go to next step. If resistance is not less than 5 ohms, go to step 6).
- Repair open in appropriate wire. See WIRING DIAGRAMS . Perform DIAGNOSTIC SYSTEM CHECK .
- Replace left lumbar switch. See appropriate POWER SEATS article. Perform DIAGNOSTIC SYSTEM CHECK .
- Check power and ground circuits to MSM. See WIRING DIAGRAMS . Check for poor connections at MSM. If circuits and connections are okay, replace MSM. Perform DIAGNOSTIC SYSTEM CHECK .
- Disconnect suspect seat motor. Connect a fused jumper wire between one motor terminal and battery voltage. Connect another fused jumper wire between other motor terminal and ground. If motor runs, go to next step. If motor does not run, go to step 10).
- Repair open or short to ground in appropriate wire between suspect motor and MSM. See WIRING DIAGRAMS . Perform DIAGNOSTIC SYSTEM CHECK.
- Replace suspect seat motor. See appropriate POWER SEATS article. Perform DIAGNOSTIC SYSTEM CHECK .