Monday, November 2, 2020

2010 Cadillac Truck SRX AWD V6-3.0L Page 723

2010 Cadillac Truck SRX AWD V6-3.0L Page 723



Exterior Lighting Systems Description and Operation (See: Lighting and Horns/Description and Operation/Exterior Lighting Systems)



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)



Scan Tool Reference



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



Circuit/System Verification



Ignition ON, observe the function of the left trailer turn signal lamp and the right trailer turn signal lamp while commanding the Left Trailer Turn



Signal Lamp and the Right Trailer Turn Signal Lamp ON and OFF with a scan tool. The left trailer turn signal lamp and the right trailer turn signal



lamp should turn ON and OFF while changing between the commanded states.



Circuit/System Testing



1. Ignition OFF, disconnect the X5 harness connector at the K9 BCM.



2. Ignition ON, test for greater than 10 V between the control circuit terminal listed below and ground:



* Right trailer turn signal lamp control terminal 17



* Left trailer turn signal lamp control terminal 8



瀚慖f less than the specified value, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace



the X50 A fuse block-underhood.



3. If all the circuits test normal, replace the K9 BCM.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Fuse Block Replacement (See: Maintenance/Fuses and Circuit Breakers/Fuse Block/Service and Repair/Removal and Replacement/Fuse



Block Replacement)



* Control Module References (See: Testing and Inspection/Programming and Relearning)for BCM replacement, programming and setup



With U4G



DTC B3887 or B3888 (With U4G)



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC B3887 02



- Trailer Left Turn Signal Circuit Short to Ground



DTC B3887 04



- Trailer Left Turn Signal Circuit Open



DTC B3888 02



- Trailer Right Turn Signal Circuit Short to Ground

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