Step
| Action
| Values
| Yes
| No
|
Schematic Reference:
Video System Schematics
DEFINITION: One of the following conditions occurs:
| • | One or both speakers of the wireless headphones do not play radio
audio. Video audio is OK through the wireless headphones. |
| • | Sound is not heard from the wireless headphone speakers |
|
1
| Did you perform a Diagnostic System
Check-Entertainment System?
| --
| Go to
Step 2
| Go to
Diagnostic System Check - Entertainment System
|
2
|
- Turn ON the ignition.
- Turn ON the wireless headphones.
- Test the operation of the radio and rear seat audio (RSA) control
with the rear video system OFF.
- Turn OFF the radio and the RSA control.
- Turn ON power to the video cassette player (VCP) and the front
video display.
- Insert a pre-recorded VHS tape in the VCP and press the PLAY button
on the VCP. The front video display plays video from the VCP. Video audio
plays through the rear speakers and the wireless headphones, both channels.
- While the VCP is playing, turn the radio ON. The rear speakers
mute. The front speakers play radio audio. Video audio plays through the wireless
headphones, both channels.
- Turn ON the RSA control. The wired headphones play radio audio.
- Test the wireless headphones using the channel switch and the
volume control on the headphones. The wireless headphones play radio audio
through one channel and video audio through the other channel.
Does the system operate normally?
| --
| Go to
Testing for Intermittent Conditions and Poor Connections
in Wiring Systems
| Go to
Step 3
|
3
| Using the rear video remote control,
test the balance and fade to the wireless headphones during video play using
a known good set of wireless headphones.
Is the rear video system operation normal?
| --
| Go to
Step 4
| Go to
Step 6
|
4
| Test and replace as needed the batteries of the wireless headphones.
Did you find and correct the condition?
| --
| Go to
Step 11
| Go to
Step 5
|
5
| Replace the wireless headphones.
Did you complete the replacement?
| --
| Go to
Step 11
| --
|
6
|
- Disconnect the front video display connector C2.
- Turn ON the ignition.
- Lower the front video display.
- Turn ON the rear seat audio (RSA) control and tune the radio to
play a station with a strong signal.
- Measure the AC voltage of each of the following circuits at the
harness connector C2 of the front video display:
| • | The right rear low level audio signal (+) circuit |
| • | The left rear low level audio signal (+) circuit |
Is AC voltage present at each circuit?
| --
| Go to
Step 7
| Go to
Step 9
|
7
|
- Leave the front video display connector C2 disconnected.
- Measure the DC voltage of the rear seat audio enable signal circuit
at the harness connector C2 of the front video display.
Is the voltage within the range shown?
| 9.5-13.5 V
| Go to
Step 8
| Go to
Step 9
|
8
| Inspect for poor connections at the harness connector C2
of the front video display. Refer to
Testing for Intermittent Conditions and Poor Connections
, and to
Connector Repairs
in Wiring Systems.
Did you find and correct the condition?
| --
| Go to
Step 11
| Go to
Step 10
|
9
| Replace the audio/video interface module. Refer to
Audio/Video Interface Module Replacement
.
Did you find and correct the condition?
| --
| Go to
Step 11
| --
|
10
| Replace the front video display. Refer to
Video Display Replacement
.
Did you complete the replacement?
| --
| Go to
Step 11
| --
|
11
| Operate the system in order to verify the repair.
Did you correct the condition?
| --
| System OK
| Go to
Step 3
|
