SECTION 9F
AUDIO SYSTEMS
Caution : Disconnect the negative battery cable before removing or installing any electrical unit or when atool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cablewill help prevent personal injury and damage to the vehicle. The ignition must also be in LOCK unlessotherwise noted.
SPECIFICATIONS
Fastener Tightening Specifications
Application | N•m | Lb-Ft | Lb-In |
Front Door Speaker Screws | 2 | - | 18 |
Rear Speaker Screws | 2 | - | 18 |
Side Glass Antenna Screws | 8 | 11 | - |
Audio System Screws | 4 | - | 35 |
I/P Center Speaker Screws | 2 | - | 18 |
SCHEMATIC AND ROUTING DIAGRAMS
Audio System Circuit
Audio Speaker System
DIAGNOSIS
Symptoms -Entertainment
Important : The following steps must be completed before using the symptom tables.
- Perform 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 module(s) can communicate via the serial data link.
- Review the system operation in order to familiarize yourself with the system functions.
Visual/Physical Inspection
- Inspect for aftermarket devices which may affect the operation of the Radio/Audio System.
- 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 and Poor Connections on Section 9A,Body Wiring System.
Radio Poor Antenna
Using Test Antenna
Important : Use a test mast antenna to quickly check for poor vehicle antenna operation. Unplug antenna lead-in connector from radio receiver and plug a test antenna into radio. Make sure the test antenna base is grounded to the vehicle chassis and keep hands off the mast. Check radio reception in an area away from electrical interferences. Tune to several weak and strong AM and FM stations. If the radio reception improved, the problem exists with the vehicle antenna and/or lead-in cable. If the reception is still poor, refer to Audio System Trouble shooting Hints.
Antenna Ground Test
Important : Always zero out the DMM before taking a resistance measurement in order to ensure an accurate reading.
- Disconnect the negative battery cable.
- Disconnect the antenna lead-in connector from the radio receiver.
- Measure the resistance from the negative battery cable to the coaxial cable, outer conductor, connector.
- The resistance measured should be 0.20 ohms or less.
- Test the following when the resistance is greater than 0.20 ohms.
- Base of the antenna for a poor connection to body ground.
- The coaxial cable interconnects for a poor connection or corrosion.
- Test for an open or high resistance from the battery negative cable to the body.
Audio Distortion - One or More Speakers
Speakers -Distortion
Important : The following information lists the most probable cause of the concern to the least probable cause. If the list leads to the replacement of a component, always inspect for a poor connection before proceeding with replacement. Refer to Testing for Intermittent and Poor Connections in Section 9A, Body Wiring System.
Audio Too Loud at Low Settings
| Step | Action | Value(s) | Yes | No |
| 1 | - Turn ON the radio.
- Adjust the volume to the lowest setting that can be heard.
Is the lowest audible setting too loud? | - | Go to Step 2 | System OK |
| 2 | Compare the volume to a similar vehicle with the same audio system. Are both vehicles the same? | - | System OK | Go to Step 5 |
| 3 | Test the amplifier sense signal circuit for an open or high resistance. Did you find and correct the condition? | - | Go to Step 9 | Go to Step 4 |
| 4 | - Turn OFF the ignition.
- Disconnect the audio amplifier sensor signal circuit and ground.
- Connect a 3-amp fused jumper between the amplifier sensor signal circuit and ground.
- Turn ON the ignition, with the engine OFF.
Does the scan tool indicate that the audio amplifier is present? | - | Go to Step 8 | Go to Step 5 |
| 5 | Inspect for poor connections at the harness connector of the radio. Did you find and correct the condition? Is the repair complete? | - | Go to Step 9 | Go to Step 7 |
| 6 | Inspect for poor connections at the harness connector of the audio amplifier. Did you find and correct the condition? | - | Go to Step 9 | Go to Step 8 |
| 7 | Replace the radio. Did you complete the replacement? | - | Go to Step 9 | - |
| 8 | Replace the audio amplifier. Did you complete the replacement? | - | Go to Step 9 | - |
| 9 | Operate the system in order to verify the repair. Did you correct the condition? | - | System OK | Go to Step 2 |
Steering Wheel Controls Inoperative
| Step | Action | Value(s) | Yes | No |
| 1 | Operate all of the steering wheel controls. Do all of the steering wheel controls operate properly? | - | Go to Testing for Intermittent and Poor Connections in Section 9A, Body Wiring Systems | Go to Step 2 |
| 2 | Test the radio on signal circuit for a short to ground or open. Did you find and correct the condition? | - | Go to Step 9 | Go to Step 3 |
| 3 | Caution : When performing service on or near the SIR components or the SIR wiring, the SIR system must be disabled. - Test the resistance of the steering wheel control switches.
- Press the steering wheel control switches to the correct function, one at a time, and compare the measured values to those shown.
Are the measured resistances approximately equal to the specified values? | Volume Up: 1.2K Ω Volume Down: 1.56K Ω Mode: 1.9K Ω Mute: 2.38K Ω Seek Up: 3.1K Ω Seek Down: 4.28K Ω Seek Type: 6.65K Ω Pre-Set: 13.6K Ω | Go to Step 4 | Go to Step 6 |
| 4 | Test the steering wheel controls signal circuit for a short, high resistance or an open. Did you find and correct the condition? | - | Go to Step 9 | Go to Step 5 |
| 5 | Inspect for poor connections at the harness connector of the radio. Did you find and correct the condition? | - | Go to Step 9 | Go to Step 8 |
| 6 | Inspect for poor connections at the harness connector of the steering wheel radio controls. Did you find and correct the condition? | - | Go to Step 9 | Go to Step 7 |
| 7 | Replace the appropriate steering wheel radio control. Did you complete the replacement? | - | Go to Step 9 | - |
| 8 | Replace the radio. Did you complete the replacement? | - | Go to Step 9 | - |
| 9 | Operate the system in order to verify the repair. Did you correct the condition? | - | System OK | Go to Step 1 |
MAINTENANCE AND REPAIR
ON-VEHICLE SERVICE
Audio Systems
Removal Procedure
- Disconnect the negative battery cable.
- Remove the I/P center trim panel.
- Remove the screws and the audio system.
- Disconnect the audio system electrical connectors.
Installation Procedure
- Connect the audio system electrical connectors.
Notice : Dissimilar metals in direct contact with each other may corrode rapidly. Make sure to use the correct fasteners to prevent premature corrosion.
- Install the audio system with the screws.
- Install the audio system with the screws.
Tighten
Tighten the audio system screws to 4 N•m (35 lb-in).
- Install the I/P center trim panel.
- Install the I/P center trim panel.
- Connect the negative battery cable.
- Connect the negative battery cable.
Audio Remote Controller
Removal Procedure
- Remove the driver airbag module. Refer to Section 8B, Supplemental Restraints System.
- Remove the steering wheel side cover.
- Remove the audio remote controller.
Installation Procedure
- Install the audio remote controller.
- Install the audio remote controller.
- Install the steering wheel side cover.
- Install the driver airbag module. Refer to Section 8B, Supplement Restraints System.
Door Speakers
Removal Procedure
- Disconnect the negative battery cable.
- Remove the door trim panel. Refer to Section9G, Interior Trim.
- Remove the screws and the door speaker.
- Disconnect the electrical connector.
Installation Procedure
Notice : Dissimilar metals in direct contact with each other may corrode rapidly. Make sure to use the correct fasteners to prevent premature corrosion.
- Connect the electrical connector.
- Connect the electrical connector.
- Install the door speaker with the screws.
Tighten
Tighten the door speaker screws to 2 N•m (18 lb-in).
- Install the door trim panel. Refer to Section9G, Interior Trim.
- Connect the negative battery cable.
- Connect the negative battery cable.
I/P Center Speaker
Removal Procedure
- Remove the I/P center trim panel.
- Remove the I/P accessory bezel.
- Remove the I/P stow tray.
- Remove the front radio speaker and grille.
Installation Procedure
- Install the front radio speaker with the screws.
Tighten
Tighten the door speaker screws to 2 N•m (18 lb-in).
- Install the front radio speaker grille.
- Install the I/P Stow tray with the screws.
Tighten
Tighten the I/P stow tray screws to 2 N•m (18 lb-in).
- Install the I/P accessory bezel with the screws.
Tighten
Tighten the I/P accessory bezel screws to 2 N•m (18 lb-in).
Side Glass Antenna Module
Removal Procedure
- Disconnect the negative battery cable.
- Remove the quarter window garnish molding. Refer to Section 9G, Interior Trim.
- Disconnect the electrical connector.
- Remove the bolt and the side glass antenna module.
Installation Procedure
- Install the side glass antenna module with the bolt.
Tighten
Tighten the side glass antenna module bolt to 8 N•m (11 lb-ft).
- Connect the electrical connectors.
- Install the quarter window garnish molding. Refer to Section 9G, Interior Trim.
- Connect the negative battery cable.
GENERAL DESCRIPTIONAND SYSTEM OPERATION
Audio Systems
There are three audio systems offered. The stereo digital Logic CD cassette AM/FM radio with electronic tape ejection is offered in standard and deluxe models. Both models feature RDS (radio data system) which automatically selectsthe best station within the chain of RDS stations currently being listened to.
Speakers
All audio systems use six speakers: two speakers mounted in the front doors, two speakers mounted in the rear deck lid sill plate and two tweeter speakers mounted on the top side of the instrument panel.
Radio Data System (RDS)
All uplevel audio systems are equipped with technology known as the Radio Data System (RDS). RDS is a system that sends data along with the audio of the FM station you are currently tuned to. RDS is a standard that de?nes how a FM broadcast station may send digital data along with the audio program. Think of it as a one way wireless modem, allowing the broadcaster to send information about the program to your receiver.
RDS data is carried in what is known as a "subcarrier". A subcarrier is a frequency that the FM broadcaster is authorized to use to send data or other audio programs that are not audible in the main audio program. RDS information can be used to display program information and to control the radio.
To receive the RDS signal, all that is needed is an FM receiver with an RDS circuit. A special integrated circuit capable of dealing with the RDS signal is in the RDS circuit and passes it along to the receiver's microprocessor where it is decoded and acted upon.
Compact Disc Care
Handle discs carefully. Store the discs in protective cases away from the sun, heat, and dust. If the surface is soiled, dampen a clean, soft cloth in a solution of mild neutral detergent and wipe the disc clean.
Antenna
The side glass antenna module is typically located on the rear quarter panel of the vehicle.
