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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1143 (Seat Heating System & Seat Cooling System) >> Diagnostic Information and Procedures >> DTC B2425 or B2430 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

B2425 Left Seat Heater Circuit

  1. Ignition OFF, disconnect the harness connector at the seat back heating element.
  2. Test for less than 5.0 ohms between the control circuit terminal A and the control circuit terminal B.
    • If greater than the specified range, replace the seat back heating element.
  3. Connect the harness connector at the seat back heating element.
  4. Disconnect the X1 harness connector at the memory seat module.
  5. Test for less than 5.0 ohms between the control circuit terminal 6 and the control circuit terminal 11.
    • If greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal, replace the seat cushion heating element.
  6. If all circuits test normal, replace the memory seat module.

B2430 Right Seat Heater Circuit

  1. Ignition OFF, disconnect the harness connector at the seat back heating element.
  2. Test for less than 5.0 ohms between the control circuit terminal A and the control circuit terminal B.
    • If greater than the specified range, replace the seat back heating element.
  3. Connect the harness connector at the seat back heating element.
  4. Disconnect the X1, X4 harness connectors at the memory seat module.
  5. Test for less than 5.0 ohms between the control circuit terminal 14 X1 and the control circuit terminal 14 X4.
    • If greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal, replace the seat cushion heating element.
  6. If all circuits test normal, replace the memory seat module.
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