锟斤拷 If greater than the specified value, test the amplifier control circuit for a short to voltage. If the circuit tests normal, replace the radio.
锟斤拷 If less than the specified value, test the amplifier control circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the radio.
3. If all circuits test normal, replace the amplifier.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning) for radio or amplifier replacement
B1288
DTC B1288
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 B1288 01
- Video Display Mode Control Signal Short to Battery
DTC B1288 02
- Video Display Mode Control Signal Short to Ground
DTC B1288 04
- Video Display Mode Control Signal Open Circuit
Diagnostic Fault Information
Circuit/System Description
The radio can control the video display mode on vehicles equipped with rear seat entertainment (RSE) video. The radio varies a pulse with
modulated (PWM) signal to the rear entertainment video screen to command the display mode.
Conditions for Running the DTC
* Ignition ON.
* Battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
The DTC will set when the radio detects a short to voltage, short to ground, or an open/high resistance in the video display mode control circuit 400
ms after the radio activates the remote enable circuit.
Action Taken When the DTC Sets
The radio sets the DTC and defaults the video display to normal mode.
