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Test 15: Lumbar Support Inoperative - With A45

  1. Perform POWER SEAT DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM in POWER SEATS - SEVILLE article. Go to next step.
  2. Disconnect lumbar switch connector. Measure voltage between lumbar switch connector terminal "G" (Orange wire) and ground. See Figure . If voltage is 9-16 volts, go to next step. If voltage is not 9-16 volts, go to step  6 .
  3. If lumbar moves when memory recall function is performed, go to next step. If lumbar does not move when memory recall function is performed, go to step  5 .
  4. Check lumbar switch connector for poor connections. If problem is found, repair as necessary, then go to step  9 . If problem is not found, go to step  7 .
  5. Check Memory Seat Module (MSM) connector for poor connections. If problem is found, repair as necessary, then go to step  9 . If problem is not found, go to step  8 .
  6. Repair open in Orange wire between lumbar switch and rear junction block. After repairs, go to step  9 .
  7. Replace lumbar switch. See POWER SEAT SWITCHES under REMOVAL & INSTALLATION in POWER SEATS - SEVILLE article. After repairs, go to step  9 .
  8. Replace MSM. See MEMORY SEAT MODULE  under REMOVAL & INSTALLATION. After repairs, go to next step.
  9. Operate system to verify repair. If system operates normally, repair is complete. If system does not operate normally, return to step  2 .
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