Home ReviewsRefund
Home/Chevrolet/Malibu/Chevrolet Malibu VII (2008-2012)/Repair manual/Memory Modules/Secondary and Configurable Customer Control System
Contents Wiring diagrams Section: Memory Modules All sections

Secondary and Configurable Customer Control System Chevrolet Malibu VII

Memory Modules 2 illustrations ~726 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Steering Wheel Trim Cover Bolt2 N.m18 lb in

Scheme 1

Scheme 1: Steering Wheel Secondary/Configurable Control Schematics
Scheme 1: Steering Wheel Secondary/Configurable Control Schematics

Symptoms - Secondary and Configurable Customer Controls

IMPORTANTPerform the Diagnostic System Check - Vehicle before using the Symptom Tables in order to verify that all of the following conditions are true: There are no DTCs set. The control modules can communicate via the serial data link. Review the system operation in order to familiarize yourself with the system functions. Refer to Steering Wheel Controls Description and Operation .

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/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__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 Malfunction (3-Spoke) in order to diagnose the symptom.

Diagnostic Instructions

  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/malibu/vii-2008-2012/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
10-Volt Reference111
Steering Wheel Control Signal11B3608
1. Steering Wheel Controls Inoperative

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.

Reference Information

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/malibu/vii-2008-2012/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Ensure the primary controls of the associated component are functioning properly.

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the right steering wheel control switch.
  2. Ignition ON, radio ON, test for 9.0-11.0 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 B+. 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 9.0 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 X2 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.
Function SwitchMinimum Resistance ValueMaximum Resistance Value
Volume Up1.1k Ohms1.5k Ohms
Volume Down1.4k Ohms1.8k Ohms
Next1.7k Ohms2.1k Ohms
Previous2.2k Ohms2.6k Ohms
Mute/Voice Activation2.9k Ohms3.3k Ohms
No Switch PressedO.L.O.L.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Steering Wheel Control Switch Assembly Replacement (Cruise Control and Radio Switch)»(/chevrolet/malibu/vii-2008-2012/remont/memory-modules/#secondary-and-configurable-customer-control-system)
  2. «Control Module References»(/chevrolet/malibu/vii-2008-2012/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for radio replacement, setup, and programming

Scheme 2

Scheme 2: Steering Wheel Control Switch Assembly Replacement (Cruise Control and Radio Switch)
Scheme 2: Steering Wheel Control Switch Assembly Replacement (Cruise Control and Radio Switch)
CalloutComponent Name
WARNING: Refer to SIR Warning . Preliminary Procedure: Remove the inflatable restraint steering wheel module. Refer to Steering Wheel Inflatable Restraint Module Replacement .
1Steering Wheel Trim Cover Bolt (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten: 2 N.m (18 lb in)
2Steering Wheel Trim Cover (Qty: 2)
3Steering Wheel Control Switch Assembly (Qty: 2) Tip: Disconnect the electrical connectors. Make sure the steering wheel control switches are properly seated to the steering wheel trim cover during installation.
WARNING
Refer to SIR Warning .
CAUTION
Refer to Fastener Caution .

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 multiple momentary contact switches and a series of resistors. The radio supplies voltage to the switches and monitors the return signal for a specific voltage drop to occur unique to the one pressed. The radio then identifies the switch selected to activate the feature, otherwise sends a serial data message that is received by the component controlled, activating the feature.

This section is intended to diagnosis 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.