2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 252
Circuit/System Description
The full open switch is part of the gear motor assembly and will close and become active when the liftgate reaches the full open position. The full
open switch signal circuit is supplied battery voltage through a resistor and monitored within the liftgate control module. The liftgate control
module (LGM) provides a low reference circuit and when the switch contacts close, the signal circuit goes low and the LGM determines the switch
to be active.
Conditions for Running the DTC
* The system voltage is 9-16 volts.
* Power open or close operation is attempted.
Conditions for Setting the DTC
B153B 02
The LGM detects a short to ground in the full open switch signal circuit
B153B 05
The LGM detects an open/high resistance in the full open switch signal circuit.
Action Taken When the DTC Sets
The power liftgate will not power close.
Conditions for Clearing the DTC
* The DTC will be current for as long as the fault is present.
* When the fault is no longer present, the DTC will be a history DTC.
* A history DTC will clear after 50 ignition cycles.
Diagnostic Aids
Important: Before testing can be performed the liftgate must be opened. Refer to Opening the Liftgate Without Electrical Power (See:
Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/Service and Repair/Procedures) for the appropriate procedure.
