Monday, June 3, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 558


Diagnostic Fault Information



Circuit/System Description



The driver and front passenger heated seat heating elements are controlled by a common high current relay internal to the memory seat module



(MSM) and the low side by individual element control circuits. The MSM connects the heated seat 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 this reference voltage is shorted to ground or battery voltage. Once the MSM verifies that it is not closing to a shorted heating



element, it allows heated seat operation. After which it continues to monitor for a shorted circuit.



Conditions for Running the DTC



The MSM must be powered.



Conditions for Setting the DTC

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