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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Body & Frame >> Seats >> Seat Heating System And Seat Cooling System >> Diagnostic Information and Procedures >> DTC B2425 or B2430: Seat Cushion Heater (Without Memory A45) >> Circuit/System Testing

Circuit/System Testing

B2425 0B, B2425 0D, or B2425 0E

  1. Ignition OFF, disconnect the harness connector at the E14B Seat Heating Element - Driver Cushion.
    2. NOTE:

    Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat unoccupied, then with the seat occupied.

    If the resistance is measured with the seat still warm or cool, the resistance values will vary. The following resistance values were determined with the seat heater elements at 23°C (73°F).

  2. Test for 0.75-1.98Ω between control circuit terminal 3 and control circuit terminal 4.
    • If not between 0.75-1.98Ω 

      Replace the E14B Seat Heating Element - Driver Cushion.

    • If between 0.75-1.98Ω 
  3. Connect the harness connector at the E14B Seat Heating Element - Driver Cushion and disconnect the harness connector at the E14A Seat Heating Element - Driver Back.
    4. NOTE:

    Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat unoccupied, then with the seat occupied.

  4. Test for 0.41-1.10Ω between control circuit terminal 1 and control circuit terminal 2.
    • If not between 0.41-1.10Ω 

      Replace the E14A Seat Heating Element - Driver Back.

    • If between 0.41-1.10Ω 
  5. Connect the harness connector at the E14A Seat Heating Element - Driver Back and disconnect the X2 harness connector at the K29 Seat Heating Control Module.
    6. NOTE:

    Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat unoccupied, then with the seat occupied.

  6. Test for 1.09-3.73Ω between control circuit terminal 1 and control circuit terminal 3.
    • If less than 1.09Ω 

      Repair the short between the circuits.

    • If greater than 3.73Ω 

      Repair the open/high resistance in the circuit.

    • If between 1.09-3.73Ω 
  7. Replace the K29 Seat Heating Control Module.

B2430 0B, B2430 0D, or B2430 0E

  1. Ignition OFF, disconnect the harness connector at the E14D Seat Heating Element - Passenger Cushion.
    2. NOTE:

    Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat unoccupied, then with the seat occupied.

    If the resistance is measured with the seat still warm or cool, the resistance values will vary. The following resistance values were determined with the seat heater elements at 23°C (73°F).

  2. Test for 0.75-1.98Ω between control circuit terminal 3 and control circuit terminal 4.
    • If not between 0.75-1.98Ω 

      Replace the E14D Seat Heating Element - Passenger Cushion.

    • If between 0.75-1.98Ω 
  3. Connect the harness connector at the E14D Seat Heating Element - Passenger Cushion and disconnect the harness connector at the E14C Seat Heating Element - Passenger Back.
    4. NOTE:

    Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat unoccupied, then with the seat occupied.

  4. Test for 0.41-1.10Ω between control circuit terminal 1 and control circuit terminal 2.
    • If not between 0.41-1.10Ω 

      Replace the E14C Seat Heating Element - Passenger Back.

    • If between 0.41-1.10Ω 
  5. Connect the harness connector at the E14C Seat Heating Element - Passenger Back and disconnect the X2 harness connector at the K29 Seat Heating Control Module.
    6. NOTE:

    Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat unoccupied, then with the seat occupied.

  6. Test for 1.09-3.73Ω between control circuit terminal 2 and control circuit terminal 5.
    • If less than 1.09Ω 

      Repair the short between the circuits.

    • If greater than 3.73Ω 

      Repair the open/high resistance in the circuit.

    • If between 1.09-3.73Ω 
  7. Replace the K29 Seat Heating Control Module.
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