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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 42 (Seat Heating System And Seat Cooling System) >> Diagnostic Information and Procedures >> Heated/Cooled Seat Switch Indicator Malfunction >> Circuit/System Testing

Circuit/System Testing

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.

Heated and Cooled Seat Switch Indicators Inoperative

  1. Ignition OFF, disconnect the (C4) harness connector at the door module.
  2. Connect a 3A fused jumper wire between the low reference circuit terminal 4 and ground.
  3. Connect a test lamp between each indicator control circuit and battery voltage. Each indicator should illuminate when tested.
    • If any indicator does not illuminate, replace the heated and cooled seat switch.
  4. If all indicators illuminate, replace the door module.

Heated and Cooled Seat Switch Indicators Always On

  1. Ignition OFF, disconnect the (C4) harness connector at the door module.
  2. Ignition ON, the heated and cooled seat switch mode indicators should not be illuminated.
    • If illuminated, test the control circuit of the illuminated indicator for a short to voltage.
  3. If all circuits test normal, replace the door module.
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