Tuesday, April 20, 2021

2010 Cadillac Truck SRX FWD V6-3.0L Page 445

2010 Cadillac Truck SRX FWD V6-3.0L Page 445



* 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 B1289 01



- Video Display Brightness Control Signal Short to Battery



DTC B1289 02



- Video Display Brightness Control Signal Short to Ground



DTC B1289 04



- Video Display Brightness Control Signal Open Circuit



Diagnostic Fault Information



Circuit/System Description



The radio can control the seatback video display brightness on vehicles equipped with rear seat entertainment (RSE) video. A single brightness



control circuit is used by the radio to control the display screen brightness for both displays via a pulse width modulated signal. If the display screen



does not receive a signal, the display screen will operate at default brightness, which is a middle brightness level.



Conditions for Running the DTC



* Ignition ON.



* Battery voltage must be between 9-16 volts.

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