2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 537

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 537

Circuit/System Description

The front seat heating elements are controlled by a common high current relay internal to the heated seat control module (HSM) and on the low side

by individual element control circuits. The HSM connects the seat heater element supply voltage circuits to a common reference point. This

reference point is biased to approximately 2.5 V. Before the HSM will allow heated seat operation, it checks to see if the heating element supply

voltage circuits and control circuits are shorted to ground or battery voltage. Once the HSM 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 circuit.

Conditions for Running the DTC

The HSM must be powered.

Conditions for Setting the DTC

B2345 00

After a heated seat is activated, the HSM detects a shorted circuit on the seat heating element supply voltage circuit or control circuit.

B2345 13

Any of the temperature sensor inputs remains below 1.45 V for more than 1 second.

B2345 42

The current sensing calibration is not programmed.

B2345 4B

The current sensing calibration is out of range.

Action Taken When the DTC Sets

The heated seat function for both seats will be disabled.