Monday, August 5, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 709


Circuit/System Description



The memory seat module (MSM) controls the driver seat, adjustable pedal, and tilt steering wheel motors via half bridges that are divided into 2



groups that are connected to separate power rails internal to the module. The MSM connects all of the motor control circuits to a common reference



point whenever they are not in operation. This reference point is biased to approximately 2.5 V. The MSM checks to see if this reference voltage is



shorted to ground or battery before enabling any seat, adjustable pedal, or steering wheel motor.



Conditions for Running the DTC



The MSM must be powered.



Conditions for Setting the DTC



B3920 01



The voltage on any power rail 1 motor control circuit exceeds 2.78 V for 100 ms.



B3920 02



The voltage on any power rail 1 motor control circuit is below 1.47 V for 100 ms.



B3921 01



The voltage on any power rail 2 motor control circuit exceeds 2.78 V for 100 ms.

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