Friday, August 13, 2021

2010 Cadillac Truck SRX FWD V6-3.0L Page 747

2010 Cadillac Truck SRX FWD V6-3.0L Page 747



Repair Instructions



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



* Front Side Turn Signal Lamp Bulb Replacement (See: Lighting and Horns/Turn Signals/Turn Signal Lamp/Turn Signal Bulb/Service and



Repair/Front Side Turn Signal Lamp Bulb Replacement)



* Front Turn Signal Lamp Bulb Replacement (T84, T85 Driver Side Headlamp) (See: Lighting and Horns/Turn Signals/Turn Signal



Lamp/Turn Signal Bulb/Service and Repair/Front Turn Signal Lamp Bulb Replacement (T84, T85 Driver Side Headlamp))Front Turn Signal



Lamp Bulb Replacement (T84, T85 Passenger Side Headlamp) (See: Lighting and Horns/Turn Signals/Turn Signal Lamp/Turn Signal



Bulb/Service and Repair/Front Turn Signal Lamp Bulb Replacement (T84, T85 Passenger Side Headlamp))Front Turn Signal Lamp Bulb



Replacement (TT6,TT7,TT8 Passenger Side Headlamp) (See: Lighting and Horns/Turn Signals/Turn Signal Lamp/Turn Signal



Bulb/Service and Repair/Front Turn Signal Lamp Bulb Replacement (TT6,TT7,TT8 Passenger Side Headlamp))Front Turn Signal Lamp



Bulb Replacement (TT6,TT7,TT8 Driver Side Headlamp) (See: Lighting and Horns/Turn Signals/Turn Signal Lamp/Turn Signal



Bulb/Service and Repair/Front Turn Signal Lamp Bulb Replacement (TT6,TT7,TT8 Driver Side Headlamp))



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



B3950



DTC B3950 or B3951



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 Descriptor



DTC B3950 02



- Left Rear Turn Signal Circuit Short to Ground



DTC B3951 02



- Right Rear Turn Signal Circuit Short to Ground



Diagnostic Fault Information



Circuit/System Description



Ground is applied at all times to the turn signal/multifunction switch. The turn signal lamps may only be activated with the ignition switch in the



ON or START position. When the turn signal/multifunction switch is placed in either the TURN RIGHT or TURN LEFT position, ground is



applied to the body control module through either the right turn or left turn signal switch signal circuit. The BCM then applies a pulsating voltage to



the front and rear turn signal lamps through there respective voltage supply circuits. When a turn signal request is received by the BCM, a serial



data message is sent to the instrument cluster requesting the respective turn signal indicator be pulsed ON and OFF.



Conditions for Running the DTC



The appropriate turn signal is active



Conditions for Setting the DTC



The BCM detects a short to ground on the rear turn signal control circuit



Action Taken When the DTC Sets

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