2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 249
contacts close the signal circuit goes low and the LGM determines the switch to be active. The full open switch is a limit switch mounted on the
gear motor assembly alongside the swing arm gear. The full open switch signal circuit is supplied battery voltage through a resistor and monitored
within the LGM. When the liftgate reaches the full open position, the switch signal circuit is closed to the low reference circuit and the signal
circuit voltage goes low.
Conditions for Running the DTC
The system voltage is 9-16 volts.
Conditions for Setting the DTC
B153A 00
The LGM detects a fault in any of the following switch signal circuits:
* Ratchet switch
* Pawl switch
* Sector switch
B153A 08
When the LGM detects a loss of B+ voltage, an open/high resistance in the sensor signal circuit, an open/high resistance in the liftgate latch low
reference circuit, or any incorrect combination of signals from the following switch inputs:
* Ratchet switch
* Pawl switch
* Sector switch
Action Taken When the DTC Sets
* Power open will be disabled.
* The latch may be inoperative or not function normally.
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
DTC B153A may be set when the vehicle is driven while the liftgate is open, as when the owner transports a large package in the rear of the
vehicle. The DTC will become history after the liftgate is closed and does not affect normal liftgate operation.
Note: 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.
Whenever the LGM loses power or is disconnected, the ignition must be cycled OFF then ON in order to reactivate the LGM.
Reference Information
Schematic Reference
Liftgate Schematics (See: Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Liftgate Description and Operation (See: Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
