2010 Cadillac Truck SRX AWD V6-3.0L Page 441
4. If all of the circuits test normal, replace the auxiliary audio jack.
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) multimedia player interface module replacement, setup,
and programming
B1287
DTC B1287
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 B1287 01
- Amplifier Control Signal Circuit Short to Battery
DTC B1287 02
- Amplifier Control Signal Circuit Short to Ground
DTC B1287 04
- Amplifier Control Signal Circuit Open
Diagnostic Fault Information
Circuit/System Description
The radio provides a remote amplifier mute output circuit to control overall muting of the remote amplifier. The amplifier receives pulse width
modulated (PWM) signals on the control circuit at varying duty cycle percentages for controlling muted and unmuted functions of the amplifier.
Circuitry internal to the radio monitors the remote amplifier mute circuit for faults and sets the appropriate DTC when faults are detected.
Conditions for Running the DTC
The following are conditions that must be present in order for the radio to enable the diagnostics.
* The radio is in ACCESSORY, RUN, or RAP power mode.
* The system voltage is at least 9 V and no more than 16 V.
Conditions for Setting the DTC
The radio detects a fault on the amplifier control circuit 400 ms after radio activates the remote enable circuit.
Action Taken When the DTC Sets
Radio sets the DTC and continues to output correct state.
Conditions for Clearing the DTC
* The condition must be corrected.
* A history DTC clears after 100 malfunction-free ignition cycles.
* The radio receives the clear code command from the scan tool.
