2010 Cadillac CTS Sedan AWD V6-3.6L Page 370
Circuit/System Description
The memory seat module (MSM) supplies a 5-volt reference voltage to the driver seat, lumbar, and tilt/telescoping steering column position
sensors. The MSM monitors this reference voltage to ensure the accuracy of the voltages being returned from the sensors. If the voltage exceeds the
normal operating range, errors will occur in the memory recall operations of the seat and tilt/telescoping steering.
Conditions for Running the DTC
The MSM must be powered.
Conditions for Setting the DTC
B1395 02
The reference voltage drops below 4.8 volts for more than 300 mS.
B1395 05
The reference voltage exceeds 5.2 volts for more than 300 mS.
Action Taken When the DTC Sets
All memory recall functions will be disabled.
Conditions for Clearing the DTC
* The current DTC will clear and set the code to history, 3 seconds after the reference voltage returns to the normal operating range and the
ignition is cycled OFF then back to ACC or RUN.
* The history DTC will clear after 50 consecutive fault-free ignition cycles have occurred.
Diagnostic Aids
* All position sensors use common ground and 5-volt reference circuits.
* If the 5-volt reference circuit is shorted to voltage multiple position sensor codes will set.
* If the 5-volt reference circuit is shorted to ground multiple position sensor codes will set.
* A short to voltage on one of the position sensor signal circuits may set this DTC.
* An internal short to ground in one of the position sensors may set this DTC.
Reference Information
Schematic Reference
* Driver Seat Schematics (See: Body and Frame/Seats/Diagrams/Electrical Diagrams/Driver Seat Schematics)
* Tilt/Telescoping Steering Column Schematics (See: Diagrams/Electrical Diagrams/Steering/Steering Column/Tilt/Telescoping Steering
