8A - Audio/Video/Entertainment/Connectivity - 2014 Jeep Wrangler JK Factory Service Manual

DESCRIPTION

Several combinations of radio receivers and speaker systems are offered.

The audio system includes the following components:

Antenna (Radio, Satellite, GPS)
Amplifier (if equipped)
Radio noise suppression components
Radio
Satellite receiver (Integrated within the radio unit)
Speakers
Subwoofer (if equipped)

Certain functions and features of the audio system rely upon resources shared with other electronic modules in the vehicle over the Controlled Area Network (CAN). The data bus network allows the sharing of sensor information. For diagnosis of these electronic modules or of the data bus network, the use of a scan tool and the proper Diagnostic Procedures manual are recommended.

OPERATION

The audio system components are designed to provide audio entertainment and information through the reception, tuning and amplification of locally broadcast radio signals in both the Amplitude Modulating (AM) and Frequency Modulating (FM) commercial frequency ranges.

The audio system components operate on battery current received through a fuse in the Junction Block (JB) on a fused ignition switch output (run-acc) circuit so that the system will only operate when the ignition switch is in the Run or Accessory positions.

DIAGNOSIS AND TESTING - AUDIO

Any diagnosis of the Audio system should begin with the use of a scan tool. Check for any Diagnostic Trouble Codes (DTCs) in Section 28 - RADIO. If there are any DTCs, perform the appropriate diagnostic procedure before proceeding in this section.

Refer to the appropriate wiring information.

WARNING:

Disable the airbag system before attempting any steering wheel, steering column, seat belt tensioner, side airbag or instrument panel component diagnosis or service. Disconnect and isolate the negative battery (ground) cable. Wait two minutes for the airbag system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the airbag system. Failure to follow these instructions may result in accidental airbag deployment and possible serious or fatal injury.

AUDIO SYSTEM DIAGNOSTIC TABLE

CONDITION	POSSIBLE CAUSES	CORRECTION
RADIO INOPERATIVE	1. Fuse inoperative.	Check radio fuse
RADIO INOPERATIVE	2. Open wiring.	Check "No Response from Radio" (Refer to 29 - Non-DTC Diagnostics/Communication - Diagnosis and Testing) .
NO AUDIO - BUT RADIO LIGHTS UP	1. Antenna problem.	Perform the "Poor or No AM/FM Audio Reception" test. (Refer to 29 - Non-DTC Diagnostics/Audio/Video - Diagnosis and Testing) .
	2. Radio or Amplifier (if equipped) connector damaged.	Check for loose or corroded radio/amplifier connector. Repair, as required.
	3. Wiring damaged.	Check for shorted or open wires. Repair wiring as required.
	4. Radio or Amplifier (if equipped) ground damaged.	Check for continuity between radio chassis and a known good ground. There should be continuity. Repair ground as required.
	5. Amplifier (if equipped) inoperative.	(Refer to 28 - DTC-Based Diagnostics/AMPLIFIER (AMP) - Diagnosis and Testing).
	6. Speakers inoperative.	(Refer to 28 - DTC-Based Diagnostics/RADIO - Diagnosis and Testing) .
NO RADIO DISPLAY	1. Fuse inoperative.	Check radio fuse, Replace fuses as required.
	2. Radio connector damaged.	Check for loose or corroded radio connector. Repair as required.
	3. Wiring damaged.	Check for battery voltage at radio connector. Repair wiring as required.
	4. Radio ground circuit damaged.	Check for continuity between radio chassis and a known good ground. There should be continuity. Repair ground as required.
	5. Radio inoperative.	Check "No Response from Radio" (Refer to 29 - Non-DTC Diagnostics/Communication - Diagnosis and Testing) .
POOR AM/FM RADIO RECEPTION	1. Antenna inoperative.	Perform the "Poor or No AM/FM Audio Reception" test. (Refer to 29 - Non-DTC Diagnostics/Audio/Video - Diagnosis and Testing) .
	2. Radio ground damaged.	Check for continuity between radio chassis and a known good ground. There should be continuity. Repair ground as required.
	3. Radio inoperative.	(Refer to 28 - DTC-Based Diagnostics/RADIO - Diagnosis and Testing) or (Refer to 29 - Non-DTC Diagnostics/Communication - Diagnosis and Testing) .
POOR SDAR AUDIO RECEPTION	1. SDAR Antenna Inoperative.	Perform the "Poor or No Satellite Audio Reception" test. (Refer to 29 - Non-DTC Diagnostics/Audio/Video - Diagnosis and Testing) .
SOUND DISTORTION (VIBRATION FROM SPEAKER AREA, BUZZING - HUMMING)	1. Door trim panel loose or missing fasteners.	Inspect door trim panel and correct as necessary. Replace any missing fasteners.
	2. Water shield loose or misaligned.	Inspect water shield and adjust as required.
	3. Items placed in door trim panel map pockets vibrating or moving from side to side.	Remove items from door trim panel. Ensure that vibration is no longer present.

STANDARD PROCEDURE - RADIO BACKUP AND RESTORE

The radio's internal hard disk drive (HDD) can be backed up and restored using a USB memory stick to save customer data in the event that a radio replacement is required. This procedure can only be performed with radios equipped with a hard disk drive (RER, REN, RHR, RHB, RBZ, REU, RHP, RHW & RB2).

Turn the ignition to RUN, engine OFF.

Connect the scan tool to the vehicle connector and perform the following steps:
1. Go to the “Vehicle View”
2. Click on the “Radio” icon button from the topology view
3. Select the “System Tests” folder
4. Click on the “Radio Hard-drive Back-up” option, and then click “Continue”
5. When prompted to “Please connect portable Back-up Hard-drive to the radio before continuing” insert a blank USB memory stick with sufficient space into the radio USB port and click “Continue”.
6. On the radio screen, select the “HDD Backup” option and follow the instructions on the radio screen. Once complete, remove the USB memory stick, select the back arrow on the radio screen and then select “Exit”.
  
  NOTE: Hard drive back up times can vary based on radio hard drive used space. Ensure that the vehicle has the proper battery voltage to complete the entire download.
7. On the scan tool, click “Complete” and disconnect from the vehicle.

With the ignition in the RUN position, engine OFF and the scan tool connected to the vehicle, perform the following steps to restore the data:
1. Go to “Vehicle View”.
2. Click on the “Radio” icon button.
3. Select the “System Tests” folder.
4. Click on the “Radio Hard-drive Back-up” option, and then click “Continue”.
5. When prompted to “Please connect portable Backup hard-drive to the radio before continuing” plug in the USB memory stick that was used in the Back Up procedure, into the USB radio port, and click “Continue”.
6. On the radio screen, select the “HDD Restore” option and follow the instructions on the radio screen. Once complete, select the back arrow and then select “Exit”.
7. On the scan tool, click “Complete” and disconnect it from the vehicle.
8. Remove the USB memory stick from the radio and turn the ignition to the OFF position.
9. Open the driver door and the close all doors. Wait for a minimum of two minutes to allow the vehicle communication bus to go to sleep.
10. Turn the ignition on, and turn on the radio. If you do not see the personal files on the hard drive, repeat step “h” above and wait a minute longer.