Secondary and Configurable Customer Controls Chevrolet Corvette C6

Scheme 1

Begin the system diagnosis with the Diagnostic System Check - Vehicle . The Diagnostic System Check - Vehicle will provide the following information

1. The identification of the control modules which command the system
2. The ability of the control modules to communicate through the serial data circuit
3. The identification of any stored DTCs and their status

The use of the Diagnostic System Check - Vehicle will identify the correct procedure for diagnosing the system and where the procedure is located.

Visual/Physical Inspection

1. Inspect for aftermarket devices which may affect the operation of the Steering Wheel Controls System. Refer to «Checking Aftermarket Accessories»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__checking-aftermarket-accessories) .
2. Inspect for easily accessible or visible system components for obvious damage or conditions which may cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

Refer to Steering Wheel Controls Inoperative in order to diagnose the symptom.

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

Circuit/System Description

The radio supplies voltage to the audio steering wheel control switches and monitors the return signal. Each switch state is associated to a set resistance value and when pressed a specific voltage drop occurs across the resistor unique to the switch. The radio identifies the switch selection and activates the feature.

Diagnostic Aids

Before diagnosis of the steering wheel controls, ensure the primary controls of the associated component are functioning properly.

Reference Information

Schematic Reference

1. «Steering Wheel Secondary/Configurable Control Schematics»(/chevrolet/corvette/c6-2004-2014/remont/memory-modules/#secondary-and-configurable-customer-controls)
2. «Radio/Navigation System Schematics»(/chevrolet/corvette/c6-2004-2014/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)

Connector End View Reference

Component Connector End Views

Description and Operation

Steering Wheel Controls Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the right steering wheel control switch.
2. Ignition ON, radio ON, test for 9.8-10.2 volts between the voltage reference circuit terminal 2 and ground. If greater than the specified range, test the voltage reference circuit for a short to voltage. If the circuit tests normal, replace the radio. If less than the specified range, test the voltage reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
3. Test for greater than 9 volts between the voltage reference circuit terminal 2 and the signal circuit terminal 4. If less than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the radio.
4. Ignition OFF, disconnect the X1 harness connector at the radio.
5. Test for infinite resistance between the signal circuit terminal 4 and ground. If less than the specified value, test the signal circuit for a short to ground.
6. If all circuits test normal, test or replace the right steering wheel control switch.

Component Testing

1. Disconnect the harness connector at the right steering wheel control switch.
2. Connect a DMM between terminals 2 and 4 of the right steering wheel control switch. If any of the resistance measurements for the individual switches are not within the specified resistance values, replace the right steering wheel control switch.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Steering Wheel Control Switch Assembly Replacement»(/chevrolet/corvette/c6-2004-2014/remont/memory-modules/#secondary-and-configurable-customer-controls)
2. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for radio replacement, setup, and programming

Scheme 2

Steering Wheel Controls Description and Operation

The audio steering wheel control switches duplicate the function of the primary controls of the associated component, through a network of momentary contact switches and a series of resistors. The radio supplies voltage to the switches and monitors the return signal. Each switch state is associated to a set resistance value and when pressed a specific voltage drops across the resistor unique to that switch. The radio identifies the switch selected and activates the feature. Otherwise, the radio sends a serial data message to the component controlled by the switch and activates the feature.

This section is intended to diagnose the circuits between the radio and the audio steering wheel control switches. If the primary control for the device is inoperative, refer to the appropriate section for the component the steering wheel control switch is functioning.

See also:
• Diagnostic System Check - Vehicle
• Checking Aftermarket Accessories
• Testing for Intermittent Conditions and Poor Connections
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• Radio/Navigation System Schematics
• Component Connector End Views
• Circuit Testing
• Connector Repairs
• Wiring Repairs
• Control Module References
• Diagnostic Repair Verification
• Steering Wheel Inflatable Restraint Module Replacement
• Fastener Caution
• Steering Wheel Controls Description and Operation
• Steering Wheel Controls Inoperative