2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 417
1. Ignition OFF, disconnect the X3 harness connector at the audio amplifier.
2. Ignition ON, radio ON and un-muted, test for 0.5-1.0 volts between the amplifier control circuit terminal 11 and ground.
瀚慖f greater than the specified value, test the amplifier control circuit for a short to voltage. If the circuit tests normal, replace the radio.
瀚慖f 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.
