Sunday, July 28, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 168


and the sector switch will be active during the power cinch function. Each of the latch switch signal circuits are supplied battery voltage through a



resistor and monitored within the LGM. The latch switches share a common low reference circuit from the LGM and when the switch 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

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