2010 Cadillac CTS Sedan AWD V6-3.6L Page 337

2010 Cadillac CTS Sedan AWD V6-3.6L Page 337

The Display Module, Display Module Actuator, Antenna module, and Audio Amplifier (UQA) may become inoperative.

Conditions for Clearing the DTC

* The condition for setting the DTC no longer exists.

* A history DTC clears after 50 malfunction-free ignition cycles.

Diagnostic Aids

* This DTC may be stored as a history DTC without affecting the operation of the navigation radio.

* If stored only as a history DTC and not retrieved as a current DTC, do not replace the navigation radio.

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)

Description and Operation

Navigation System Description and Operation (See: Accessories and Optional Equipment/Description and Operation/Navigation System

Description and Operation)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit

Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Testing

Note: The ignition circuit controls multiple modules/components. Each of the modules will need to be disconnected if the ignition circuit test fails

for a short to voltage or short to ground. Disconnect one module/component at a time while testing the ignition circuit for a short to voltage or short

to ground. If the fault is no longer present when disconnecting a module/component replace that module/component. If the fault is still present with

all the module/component disconnected repair the circuit.

1. Ignition OFF, disconnect one of the connectors listed below at an inoperative module/component:

* Antenna Module

* Radio/HVAC Display X1

* Radio/HVAC Display X2

* Audio Amplifier X3 (UQA only)

2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal listed below and ground.

* Antenna Module - terminal 1

* Radio/HVAC Display X1 - terminal 4

* Radio/HVAC Display X2 - terminal 3

* Audio Amplifier (UQA only) - terminal 8

瀚慖f the test lamp does not illuminate, test the ignition 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 module/component that was disconnected in step 1.

Repair Instructions

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

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

and Setup

* Radio Antenna Module Replacement (Sedan) (See: Accessories and Optional Equipment/Antenna/Antenna, Radio/Service and Repair