Chevrolet Trax: DTC B2425 OR B2430 (WITHOUT MEMORY A45): Seat cushion heater circuit
Diagnostic Instructions
- Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
- Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
- Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
DTC Descriptors
DTC B2425 0B
Driver Seat Cushion Heater Circuit High Current
DTC B2425 0D
Driver Seat Cushion Heater Circuit High Resistance
DTC B2425 0E
Driver Seat Cushion Heater Circuit Low Resistance
DTC B2430 0B
Passenger Seat Cushion Heater Circuit High Current
DTC B2430 0D
Passenger Seat Cushion Heater Circuit High Resistance
DTC B2430 0E
Passenger Seat Cushion Heater Circuit Low Resistance
Diagnostic Fault Information
Circuit/System Description
The driver and front passenger heated seats are controlled by the seat
heating control module that is located
under the driver seat cushion. When the heated seat is active, the module
applies power through a common
voltage supply circuit to the seat heater elements. The module controls the seat
temperature by providing a pulse
width modulation (PWM) ground through the seat heater element control circuit to
the heater element. The
module then monitors the current flow through the heating element and the rate
of change of the temperature
sensor to verify correct heated seat operation.
Conditions for Running the DTC
- DTC B1325 must not be present.
- Engine must be ON.
- The seat heating control module must be powered and the heated seat must
be enabled.
Conditions for Setting the DTC
B2425 0D or B2430 0D
By measuring current and voltage output to the seat heating element every 10
s, the seat heating control module
calculates that the heating element resistance is above the maximum resistance.
B2425 0B, B2425 0E, B2430 0B, or B2430 0E
By measuring current and voltage output to the seat heating element every 10
s, the seat heating control module
calculates that the heating element resistance is below the minimum resistance.
Action Taken When the DTC Sets
The heated seat 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 changes to OFF
then back to ACC or RUN.
- The history DTC will clear after 40 consecutive fault-free ignition
cycles have occurred.
Reference Information
Schematic Reference
Heated/Cooled Seat Schematics (Encore), Heated/Cooled Seat Schematics (Trax)
Connector End View Reference
WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS -
INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT
CONNECTOR END VIEWS - INDEX - TRAX
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 0B, B2425 0D, or B2425 0E
- Ignition OFF, disconnect the harness connector at the E14A Seat Heating
Element - Driver Back.
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.
- Test for 0.5-2.0 ohms between control circuit terminal A and control
circuit terminal B.
- If not between 0.5-2.0 ohms
Replace the E14A Seat Heating Element - Driver Back.
- 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.
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.
- Test for 1-5 ohms between control circuit terminal 3 and control circuit
terminal 1.
- Ignition OFF, disconnect the harness connector at the E14B Seat Heating
Element - Driver
Cushion.
- 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 ohms
- Ignition OFF, disconnect the harness connector at the E14B Seat Heating
Element - Driver
Cushion.
- Test for less than 2 ohms in each control circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit
- If less than 2 ohms, test or replace the E14B Seat Heating Element -
Driver Cushion.
- If between 1-5 ohms
- Replace the K29 Seat Heating Control Module.
B2430 0B, B2430 0D, or B2430 0E
- Ignition OFF, disconnect the harness connector at the E14C Seat Heating
Element - Passenger Back.
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.
- Test for 0.5-2.0 ohms between control circuit terminal A and control
circuit terminal B.
- If not between 0.5-2.0 ohms
Replace the E14C Seat Heating Element - Passenger Back.
- 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.
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.
- Test for 1-5 ohms between control circuit terminal 5 and control circuit
terminal 2.
- Ignition OFF, disconnect the harness connector at the E14D Seat Heating
Element - Passenger
Cushion.
- 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 ohms
- Ignition OFF, disconnect the harness connector at the E14D Seat Heating
Element - Passenger
Cushion.
- Test for less than 2 ohms in each control circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- If less than 2 ohms, test or replace the E14D Seat Heating Element -
Passenger Cushion.
- If between 1-5 ohms
- Replace the K29 Seat Heating Control Module.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
- Driver or Passenger Seat Cushion Heater Replacement
- Control Module References for K29 Seat Heating Control Module
replacement, programming and setup
READ NEXT:
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
SEE MORE:
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using the
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
DTC Descriptors
DT
MANUAL TRANSMISSION COMPONENT VIEWS
Shift Control and Shift Lever/Selector Lever Cable Components
Fig. 3: Shift Control and Shift Lever/Selector Lever Cable Components
Shift Shaft Components
Fig. 4: Shift Shaft Components
Clutch Housing Components - Right Hand View
Fig. 5: Locating Clutch