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HOMESERVICE MANUALSCHEVROLET2019TAHOE LS, 4WD, GAS/ETHANOLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 108 (SEAT HEATING SYSTEM AND SEAT COOLING SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B2425 OR B2430CIRCUIT/SYSTEM TESTING
2019 Chevrolet Tahoe LS, 4WD, Gas/Ethanol

Circuit/System Testing

2019 Chevrolet Tahoe LS, 4WD, Gas/EthanolSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2018 Chevrolet Sonic. However, it is still accessible from the selected car via links, so may be relevant.

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

  1. Ignition OFF, disconnect the harness connector at the E14A Seat Heating Element - Driver Back.
    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.

  2. Test for 0.5 - 2 Ω between control circuit terminal 1 and control circuit terminal 2.
    • If not between 0.5 - 2 Ω 

      Replace the E14A Seat Heating Element - Driver Back.

    • Go to next step: If between 0.5 - 2 Ω 
  3. Connect the harness connector at the E14A Seat Heating Element - Driver Back and disconnect the X2 harness connector at the K29F Seat Heating Control Module - Front.
    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 1 - 5 Ω between control circuit terminal 3 and control circuit terminal 1.
    • If less than 1 Ω 
    1. Ignition OFF, disconnect the harness connector at the E14B Seat Heating Element - Driver Cushion.
    2. Test for infinite resistance between the control circuits.
      • If less than infinite resistance, repair the short between the circuits.
      • If infinite resistance, test or replace the E14B Seat Heating Element - Driver Cushion.
    • If greater than 5 Ω 
    1. Ignition OFF, disconnect the harness connector at the E14B Seat Heating Element - Driver Cushion.
    2. Test for less than 2 Ω in each control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, test or replace the E14B Seat Heating Element - Driver Cushion.
    • Go to next step: If between 1 - 5 Ω 
  5. Replace the K29F Seat Heating Control Module - Front.

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

  1. Ignition OFF, disconnect the harness connector at the E14C Seat Heating Element - Passenger Back.
    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.

  2. Test for 0.5 - 2 Ω between control circuit terminal 1 and control circuit terminal 2.
    • If not between 0.5 - 2 Ω 

      Replace the E14C Seat Heating Element - Passenger Back.

    • Go to next step: If between 0.5 - 2 Ω 
  3. Connect the harness connector at the E14C Seat Heating Element - Passenger Back and disconnect the X2 harness connector at the K29F Seat Heating Control Module - Front.
    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 1 - 5 Ω between control circuit terminal 5 and control circuit terminal 2.
    • If less than 1 Ω 
    1. Ignition OFF, disconnect the harness connector at the E14D Seat Heating Element - Passenger Cushion.
    2. Test for infinite resistance between the control circuits.
      • If less than infinite resistance, repair the short between the circuits.
      • If infinite resistance, test or replace the E14D Seat Heating Element - Passenger Cushion.
    • If greater than 5 Ω 
    1. Ignition OFF, disconnect the harness connector at the E14D Seat Heating Element - Passenger Cushion.
    2. Test for less than 2 Ω in each control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, test or replace the E14D Seat Heating Element - Passenger Cushion.
    • Go to next step: If between 1 - 5 Ω 
  5. Replace the K29F Seat Heating Control Module - Front.
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