LEMON Manuals: Even more car manuals for everyone
Home >> Pontiac >> 2009 >> Vibe Base, 2.4 0, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 44 (Seat Heating System & Seat Cooling System) >> Diagnostic Information and Procedures >> Heated and Cooled Seat Malfunction >> Circuit/System Testing

Circuit/System Testing

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.

Driver and Passenger Heated/Cool Seats Inoperative

  1. Ignition OFF, disconnect the X1 harness connector at the CCSM.
  2. Ignition OFF, test for less than 5 Ω between the ground circuit terminal M and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Verify that a test lamp illuminates between the B+ circuit terminal E and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. Disconnect the X2 harness connector at the CCSM.
  5. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 1 and ground.
    • If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
  6. If all circuits test normal, replace the CCSM.

Heated and Cooled Seat Malfunction

  1. Ignition OFF, disconnect the X3 harness connector at the CCSM.
  2. Connect a test lamp between the appropriate signal circuit terminal listed below and B+.
    • Driver heated/cooled seat mode signal terminal 14
    • Passenger heated/cooled seat mode signal terminal 6
  3. Ignition ON, press the HEAT or COOL switch through the high, medium, and low positions to OFF. The test lamp should illuminate until the OFF position is reached.
    • If the test lamp does not illuminate, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the MSM.
    • If the test lamp is ON with the switch in the OFF position, test the signal circuit for a short to ground. If the circuit tests normal, replace the MSM.
  4. Ignition OFF, connect the X3 harness connector at the CCSM.
  5. Disconnect the harness connector at the seat cushion ventilation heat and cool module.
  6. Connect a test lamp between the control circuit terminal 1 and ground.
  7. Ignition ON, command the appropriate Driver or Passenger Seat Heat Cmd. ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the CCSM.
    • If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the CCSM.
  8. Connect a test lamp between the control circuit terminal 3 and ground
  9. Command the appropriate Driver or Passenger Seat Cool Cmd. ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the CCSM.
    • If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the CCSM.
  10. Ignition OFF, connect the harness connector at the seat cushion ventilation heat and cool module.
  11. Disconnect the harness connector at the seat back ventilation heat and cool module.
  12. Connect a test lamp between the control circuit terminal 1 and ground.
  13. Ignition ON, command the appropriate Driver or Passenger Seat Heat Cmd. ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the CCSM.
    • If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the CCSM.
  14. Connect a test lamp between the control circuit terminal 3 and ground
  15. Command the appropriate Driver or Passenger Seat Cool Cmd. ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the CCSM.
    • If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the CCSM.
  16. If all circuits test normal, test or replace the appropriate seat cushion or seat back ventilation heat and cool module.
scientia non olet · About LEMON Manuals