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Home >> Chevy Truck >> 2012 >> Traverse AWD V6-3.6L >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> B Code Charts >> B2430 >> Without Memory A45

Without Memory A45




DTC B2425 or B2430 (Without Memory A45)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC B2425 04

-
Left Seat Heater Cushion Circuit Open

DTC B2425 0A

-
Left Seat Heater Cushion Circuit Rate of Change Below Threshold

DTC B2425 0B

-
Left Seat Heater Cushion Circuit Current Above Threshold

DTC B2425 0C

-
Left Seat Heater Cushion Circuit Current Below Threshold

DTC B2425 0D

-
Left Seat Heater Cushion Resistance Above Threshold

DTC B2425 0E

-
Left Seat Heater Cushion Resistance Below Threshold

DTC B2425 1F

-
Left Seat Heater Cushion Circuit Intermittent

DTC B2430 04

-
Right Seat Heater Cushion Circuit Open

DTC B2430 0A

-
Right Seat Heater Cushion Circuit Rate of Change Below Threshold

DTC B2430 0B

-
Right Seat Heater Cushion Circuit Current Above Threshold

DTC B2430 0C

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Right Seat Heater Cushion Circuit Current Below Threshold

DTC B2430 0D

-
Right Seat Heater Cushion Resistance Above Threshold

DTC B2430 0E

-
Right Seat Heater Cushion Resistance Below Threshold

DTC B2430 1F

-
Right Seat Heater Cushion Circuit Intermittent

Diagnostic Fault Information






Circuit/System Description

The left and right heated seats are controlled by the heated seat module (HSM). When active, power is applied to the seat cushion and back heater elements through a common voltage supply circuit. Each individual heater element is grounded by the HSM through separate low side drive control circuits. The heater element control circuits are pulse width modulated to ground by the module in order to control the seat temperature by regulating the current flow through the heater elements. The module then monitors the current flow through the heating elements and the of rate change of the temperature sensors to verify correct heated seat operation.

Conditions for Running the DTC

The HSM 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 for up to 210 seconds.

B2425 0A, B2430 0A

The module detects that the set point temperature has not been reached for up to 8.5 minutes.

B2425 0B, B2425 0E, B2430 0B, B2430 0E

By measuring the current and voltage through the seat cushion heating element every 10 seconds, the heated seat module calculates that the heating element resistance is below the minimum resistance.

B2425 0C, B2425 0D, B2430 0C, B2430 0D

By measuring the current and voltage through the seat cushion heating element every 10 seconds, the heated seat module calculates that the heating element resistance is above the maximum resistance.

B2425 1F, B2430 1F

The temperature sensor voltage is erratic or changes suddenly.

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 50 consecutive fault-free ignition cycles have occurred.

Reference Information

Schematic Reference

Heated/Cooled Seat Schematics (Except A45) Heated/Cooled Seat SchematicsHeated/Cooled Seat Schematics (With KA1) Heated/Cooled Seat Schematics (With KA1)Heated/Cooled Seat Schematics (With KB6) Heated/Cooled Seat Schematics (With KB6)

Connector End View Reference

Component Connector End Views A/C Compressor Clutch

Description and Operation

Heated Seats Description and Operation Heated Seats

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Programming and Relearning for scan tool information

Circuit/System Testing

B2425 0A, B2425 0B, B2425 0C, B2425 0D, B2425 0E, B2425 04, or B2425 1F

1. Ignition OFF, disconnect the X1 harness connector at the HSM.

Important:
When measuring the resistance, the resistance values are based on the seat being at room temperature of 20°C (68°F).


2. Test for 2-10 ohms between the control circuit terminal 3 and control circuit terminal 5.

• 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/temperature sensor.

• If less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat cushion heating element/temperature sensor.

3. Ignition OFF, disconnect the X2, X4 harness connectors at the HSM.

4. Test for 3.3 k-300 kohms between the signal circuit terminal 9 X4 and the low reference circuit terminal 6 X2.

• If greater than the specified range, test the signal circuit and low reference circuit for a short to voltage or an open/high resistance. If the circuits test normal, replace the seat cushion heating element/temperature sensor.

• If less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the seat cushion heating element/temperature sensor.

5. Ignition OFF, connect the X1, X2, X4 harness connectors at the HSM.

6. Disconnect the harness connector at the seat cushion heating element/temperature sensor.

7. Ignition ON, test for 4.8-5.2 V between the signal circuit terminal C and ground.

• If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the HSM.

• If less than the specified range, test the signal circuit for a short to ground. If the circuit tests normal, replace the HSM.

8. If all circuits test normal, replace the HSM.

B2430 0A, B2430 0B, B2430 0C, B2430 0D, B2430 0E, B2430 04, or B2430 1F

1. Ignition OFF, disconnect the X1 harness connector at the HSM.

Important:
When measuring the resistance, the resistance values are based on the seat being at room temperature of 20°C (68°F).


2. Test for 2-10 ohms between the control circuit terminal 6 and the control circuit terminal 2.

• 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/temperature sensor.

• If less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat cushion heating element/temperature sensor.

3. Ignition OFF, disconnect the X2, X4 harness connectors at the HSM.

4. Test for 3.3 k-300 kohms between the signal circuit terminal 20 X4 and the low reference circuit terminal 8 X2.

• If greater than the specified range, test the signal circuit and low reference circuit for a short to voltage or an open/high resistance. If the circuits test normal, replace the seat cushion heating element/temperature sensor.

• If less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the seat cushion heating element/temperature sensor.

5. Ignition OFF, connect the X1, X2, X4 harness connectors at the HSM.

6. Disconnect the harness connector at the seat cushion heating element/temperature sensor.

7. Ignition ON, test for 4.8-5.2 V between the signal circuit terminal C and ground.

• If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the HSM.

• If less than the specified range, test the signal circuit for a short to ground. If the circuit tests normal, replace the HSM.

8. If all circuits test normal, replace the HSM.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

* Driver or Passenger Seat Cushion Heater Replacement (Passenger) Driver or Passenger Seat Cushion Heater Replacement (Passenger)Driver or Passenger Seat Cushion Heater Replacement (Driver) Driver or Passenger Seat Cushion Heater Replacement (Driver)

* Control Module References Programming and Relearning for HSM replacement, setup, and programming

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