2010 Cadillac CTS Sedan AWD V6-3.6L Page 477
The MSM must be powered and the heated seat must be enabled.
Conditions for Setting the DTC
B2425 0D, B2430 0D
By measuring current and voltage output to the seat heating elements every 10 seconds, the MSM calculates that the heating element resistance is
above the maximum resistance.
B2425 0E, B2430 0E
By measuring current and voltage output to the seat heating elements every 10 seconds, the MSM 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 50 consecutive fault-free ignition cycles have occurred.
Reference Information
Schematic Reference
Heated/Cooled Seat Schematics (See: Body and Frame/Seats/Seat Temperature Element/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Heated/Vented Seat Description and Operation (See: Body and Frame/Seats/Seat Temperature Element/Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit
Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Testing
B2425 0D or B2425 0E
1. Ignition OFF, disconnect the X3 harness connector at the MSM.
2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 5 and ground.
瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
3. Ignition OFF, connect the X3 harness connector at the MSM and disconnect the harness connector at the seat back heating element.
4. Test for 1.7 - 7.0 Ohms between the control circuit terminal A and control circuit terminal B.
瀚慖f less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat back heating
element.
瀚慖f greater than the specified range, replace the seat back heating element.
5. Connect the harness connector at the seat back heating element and disconnect the X1 harness connector at the MSM.
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 1.7 - 7.0 Ohms between the control circuit terminal 6 and control circuit terminal 11.
瀚慖f less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat cushion heating
