2010 Cadillac CTS Sedan AWD V6-3.6L Page 336

2010 Cadillac CTS Sedan AWD V6-3.6L Page 336

* Right rear speaker output (+) - terminal 15 X2

* Right rear speaker output (-) - terminal 14 X2

* Front center speaker output (+) - terminal 13 X2

* Front center speaker output (-) - terminal 12 X2

* Left rear subwoofer speaker output (+) - terminal 5 X1

* Left rear subwoofer speaker output (-) - terminal 6 X1

* Right front speaker output (+) - terminal 7 X1

* Right front speaker output (-) - terminal 3 X1

* Left front speaker output (+) - terminal 1 X1

* Left front speaker output (-) - terminal 2 X1

* Right front speaker output (+) - terminal 7 X1

* Right front speaker output (-) - terminal 3 X1

* Left rear midrange speaker output (+) - terminal 11 X2

* Left rear midrange speaker output (-) - terminal 10 X2

瀚慖f less than the specified range, test both circuits of the affected speaker for a short to ground.

4. If all circuits test normal, reconnect all harness connectors at the amplifier.

5. Ignition ON, radio ON, disconnect the appropriate speaker.

6. Test for 5.0-7.5 volts between the signal circuit terminals and ground.

瀚慖f less then the specified range test the circuit for an open/high resistance. If the circuit tests normal, replace the amplifier.

7. If the circuit tests normal, test or replace the appropriate speaker.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Speaker Replacement Reference (See: Accessories and Optional Equipment/Testing and Inspection/Symptom Related Diagnostic

Procedures/Cellular, Entertainment, and Navigation/Speaker Replacement Reference)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for amplifier replacement, setup, and programming

B1265

DTC B1265

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 Descriptor

DTC B1265 02

- Switched 14 Volt Performance Short to Ground

Circuit/System Description

When the navigation radio is on, a discrete 12-volt signal is supplied on the Entertainment Remote Enable Signal circuit to the Display Module,

Display Actuator, Antenna module, and Amplifier (UQA). This signal is used to control the power state of the modules.

Conditions for Running the DTC

The following are conditions that must be present in order for the navigation radio to enable diagnostics:

* The ignition must be in the RUN or ACC position.

* The system voltage is at least 9.5 volts and no more than 15.5 volts.

Conditions for Setting the DTC

* The navigation radio detects a short to ground on the Entertainment Remote Enable Signal circuit.

* All the above conditions are present for greater than 250 mS.

Action Taken When the DTC Sets