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DTC B2430 1F Right Seat Cushion Heater Circuit Intermittent Diagnostic Fault Information Circuit/System Description When the heated seat function is active, the Memory Seat Module (MSM) supplies battery Conditions for Running the DTC Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance Left Heated Seat Cushion B2508 02 B2425 0C B2425 0D B2508 01 - Left Heated Seat Cushion B2508 02 B2425 0C B2425 0D B2508 01 - Left Heated Seat Cushion B1925 02 B1925 05 B2425 1F B1925 05 B2425 1F - Left Heated Seat Cushion - B1925 05 B2425 1F - - Right Heated Seat Cushion B2508 02 B2430 0C B2430 0D B2508 01 - Right Heated Seat Cushion B2508 02 B2430 0C B2430 0D B2508 01 - Right Heated Seat Cushion B2170 02 B2170 05 B2430 1F B2170 05 B2430 1F - Right Heated Seat Cushion - B2170 05 B2430 1F - -
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Seat Heating and Cooling - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
The MSM must be powered and the heated seat must be enabled. Conditions for Setting the DTC B2425 04, B2430 04 The module does not detect a temperature change within 210 seconds. B2425 0A, B2430 0A The module detects that the set point temperature has not been reached within 8.5 minutes. B2425 0B, B2425 0E, B2430 0B, B2430 0E By measuring output current, the module calculates that the heating element resistance is below B2425 0C, B2445 0D, B2430 0C, B2430 0D By measuring output current, the module calculates that the heating element resistance is above B2425 1F, B2430 1F The temperature sensor voltage is erratic or changes suddenly. Action Taken When the DTC Sets The heated seat cushion function for the affected seat will be disabled. Conditions for Clearing the DTC The current DTC clears when the malfunction is no longer present, and the power mode The history DTC will clear after 50 consecutive fault-free ignition cycles have occurred. Reference Information Schematic Reference Heated/Cooled Seat Schematics Connector End View Reference
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Seat Heating and Cooling - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Component Connector End Views Description and Operation Heated Seats Description and Operation Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Control Module References for scan tool information Circuit/System Testing B2425 1. Ignition OFF, disconnect the X1 harness connector at the MSM. 2. Test for less than 15 ohms between the heater element supply voltage circuit terminal 14 and the control circuit terminal 11. If the resistance is greater than 15 ohms test the supply and control circuits for an 3. Disconnect the X2, X5 harness connectors at the MSM. 4. Test for 850-300k ohms between the temperature sensor signal circuit terminal 1 X5 and the low reference circuit terminal 3 X2. If greater than the specified range, test the signal circuit and low reference circuit for a If less than the specified range, test for a short between the signal and low reference 5. Connect the X1, X2, X5 harness connectors at the MSM. 6. Disconnect the harness connector at the seat cushion heater element. 7. Ignition ON, test for 4.8-5.2 volts between the temperature sensor signal circuit terminal C and ground.
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Seat Heating and Cooling - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
If greater than the specified range, test the signal circuit for a short to voltage. If the If less than the specified range, test the signal circuit for a short to voltage. If the 8. If all circuits test normal, replace the MSM. B2430 Front 1. Ignition OFF, disconnect the X1, X4 harness connector at the MSM. 2. Test for less than 15 ohms between the heater element supply voltage circuit terminal 6 X1 and the control circuit terminal 14 X4. If the resistance is greater than 15 ohms test the supply and control circuits for an 3. Disconnect the X2, X5 harness connectors at the MSM. 4. Test for 850-300k ohms between the temperature sensor signal circuit terminal 2 X5 and the low reference circuit terminal 6 X2. If greater than the specified range, test the signal circuit and low reference circuit for a If less than the specified range, test for a short between the signal and low reference 5. Connect the X1, X2, X4, X5 harness connectors at the MSM. 6. Disconnect the harness connector at the seat cushion heater element. 7. Ignition ON, test for 4.8-5.2 volts between the temperature sensor signal circuit terminal C and ground. If greater than the specified range, test the signal circuit for a short to voltage. If the If less than the specified range, test the signal circuit for a short to voltage. If the 8. If all circuits test normal, replace the MSM. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Driver Seat and Passenger Seat Cushion Heater Replacement Control Module References for the MSM replacement, setup, and programming
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Seat Heating and Cooling - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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