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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