2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 442
Reference Information
Schematic Reference
Radio/Navigation System Schematics (See: Accessories and Optional Equipment/Diagrams/Electrical Diagrams/Radio/Navigation System
Schematics)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Description and Operation
Radio/Audio System Description and Operation (See: Accessories and Optional Equipment/Description and Operation/Radio/Audio System)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
Radio ON, adjust the fade and balance control to verify audio is present at each individual channel.
Circuit/System Testing
1. Ignition OFF, disconnect the X1 harness connector at the A11 radio.
2. Ignition ON, test for less than 1 V between the amplifier control circuit terminal 37 and ground.
瀚慖f greater than the specified value, test the circuit for a short to voltage. If the circuit tests normal, replace the T3 audio amplifier.
3. Ignition OFF, test for greater than 20 Ohms between the amplifier control circuit terminal 37 and ground.
瀚慖f less than the specified value, test the circuit for a short to ground. If the circuit tests normal, replace the T3 audio amplifier.
4. Ignition OFF, disconnect the X3 harness connector at the T3 audio amplifier.
5. Test for less than 5 Ohms between the A11 radio X1 terminal 37 to the T3 audio amplifier X3 terminal 11.
瀚慖f greater than specified range, test the circuit for an open/high resistance.
6. If all circuits test normal, replace the A11 radio.
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 and audio amplifier replacement, setup, and
programming
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.
