2010 Cadillac CTS Sedan AWD V6-3.6L Page 576

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2010 Cadillac CTS Sedan AWD V6-3.6L Page 576



Conditions for Running the DTC



Battery voltage is between 9-16 volts.



Conditions for Setting the DTC



The BCM detects a fault in the trunk release relay control circuit.



Action Taken When the DTC Sets



The rear compartment latch will not operate.



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



Reference Information



Schematic Reference



Release Systems Schematics (See: Body and Frame/Locks/Diagrams/Electrical Diagrams/Release Systems Schematics)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views)



Description and Operation



Luggage Compartment 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/Circuit Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit



Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Verification



Ignition ON, command the trunk release with a scan tool. The rear compartment lid latch should release the trunk lid.



Circuit/System Testing



1. Ignition OFF, disconnect the TRUNK/RELSE relay.



2. Test for less than 5 ohms between the ground circuit terminal 85 and ground.



瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.



3. Connect a test lamp between the control circuit terminal 86 and the ground circuit terminal 85.



4. Ignition ON, command the trunk release ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the



commanded states.



瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM.



瀚慖f the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace



the BCM.



5. If all circuits test normal, test or replace the TRUNK/RELSE relay.



Component Testing



Relay Test



1. Ignition OFF, disconnect the TRUNK/RELSE relay.



2. Test for 60-180 ohms between terminals 85 and 86.



瀚慖f not within the specified range, replace the relay.

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