2010 Cadillac CTS Sedan AWD V6-3.6L Page 459
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Driver or Passenger Seat Back Cushion Heater Replacement (KA1) (See: Body and Frame/Seats/Seat Temperature Element/Service and
Repair/Driver or Passenger Seat Back Cushion Heater Replacement (KA1))
* Driver Seat Cushion Heater Replacement (KA1) (See: Body and Frame/Seats/Service and Repair/Driver Seat Cushion Heater Replacement
(KA1))
* Passenger Seat Cushion Heater Replacement (KA1) (See: Body and Frame/Seats/Service and Repair/Passenger Seat Cushion Heater
Replacement (KA1))
* Control Module References (See: Testing and Inspection/Programming and Relearning) for MSM replacement, setup, and programming
B2345
DTC B2345
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B2345 4B
- Front Seat Heater Current Sensing Calibration Out of Range
DTC B2345 13
- Front Seat Heater Temperature Above Threshold
DTC B2345 42
- Front Seat Heater Current Sensing Calibration Not Present
Diagnostic Fault Information
Circuit/System Description
The heated seat heating elements are controlled by a common high current relay internal to the memory seat module (MSM) and by individual low
side element control circuits. The MSM connects the heater element supply voltage circuits for both seats to a common reference point. This
reference point is biased to approximately 2.5 V. Before the MSM will allow heated seat operation, it checks to see if the heating element supply
voltage circuits and control circuits are shorted to ground or voltage. Once the module verifies that it is not closing into a shorted heating element, it
allows heated seat operation. After which it continues to monitor for a shorted a circuit.
Conditions for Running the DTC
The MSM must be powered.
