Check the PAL Signal At the the Right-Hand Screen

: CHECK THE PAL SIGNAL AT THE THE RIGHT-HAND SCREEN

G240121t2 : CHECK THE PAL SIGNAL AT THE RIGHT-HAND SCREEN
1. Turn the ignition switch to the ACC position.
2. Set the rear entertainment control panel to AUX1 for both screens (refer to Selecting AUX1; AUX2 and Audio functions in this section).
3. Set the rear screens to AUTO (refer to Selecting AUTO/PAL/NTSC in this section).
4. Connect the video/audio tester to AUX1, video (yellow).
5. Select PAL on the video/audio tester, make sure the blue LED is illuminated.
6. Observe the rear screen image.

- Is the PAL test image displayed on the right-hand screen?

-> Yes
INSTALL a new right-hand screen, (The screen cannot decode a NTSC signal).

-> No

G240121t3 : CHECK THE SIGNAL TO THE RIGHT-HAND REAR SCREEN INTERMEDIATE CONNECTOR TL91
1. Reposition the right-hand front seat fully forward and to the fully raised position.
2. Turn the ignition switch to the OFF position.
3. Make sure the video/audio tester is switched OFF.
4. Disconnect the intermediate connector, TL91.
5. Connect the oscilloscope. Refer to Oscilloscope set-up procedure in this section.
6. Turn the video/audio tester ON, and to the TEST position by holding in the TEST button while selecting PAL or NTSC. The blue and red LEDs will illuminate.
7. Turn the ignition switch to the ON position.
8. Using suitable adaptors, and an assistant if necessary, connect the red oscilloscope probe to TL91, pin 15 (RW).
9. Using suitable adaptors, and an assistant if necessary, connect the black oscilloscope probe to TL91, pin 09 (B).

- Is the waveform similar to the example in Waveforms in this section?

-> Yes
-> No

G240121t4 : CHECK THE CIRCUIT FROM THE AUDIO VIDEO SELECTOR MODULE TO THE INTERMEDIATE CONNECTOR TL91 FOR CONTINUITY
1. Turn the ignition switch to the OFF position.
2. Make sure the video/audio tester is switched OFF.
3. Disconnect the audio video module electrical connector, TL87.
4. Using suitable adaptors, measure the resistance between TL91, pin 15 (RW) and TL87, pin 15 (RW).
5. Using suitable adaptors, measure the resistance between TL91, pin 09 (B) and TL87, pin 09 (B).

- Is either resistance greater than 5 ohms?

-> Yes
INSTALL a new harness.

-> No
For signal output from the control panel tests, [[G240121p6]].

G240121t5 : CHECK THE SIGNAL TO THE RIGHT-HAND REAR SCREEN CONNECTOR VR01
1. Turn the ignition switch to the OFF position.
2. Make sure the video/audio tester is switched OFF.
3. Reconnect the intermediate connector, TL91.
4. Reconnect the audio video module electrical connector, TL87.
5. Disconnect the screen connector, VR01.
6. Turn the video/audio tester ON, and to the TEST position by holding in the TEST button while selecting PAL or NTSC. The blue and red LEDs will illuminate.
7. Turn the ignition switch to the ON position.
8. Using suitable adaptors, and an assistant if necessary, connect the red oscilloscope probe to VR01, pin 15 (RW).
9. Using suitable adaptors, and an assistant if necessary, connect the black oscilloscope probe to VR01, pin 09 (B).

- Is the waveform similar to the example in Waveforms in this section?

-> Yes
INSTALL a new rear screen,

-> No

G240121t6 : CHECK THE SIGNAL TO THE RIGHT-HAND REAR SCREEN INTERMEDIATE CONNECTOR VR02
1. Turn the ignition switch to the OFF position.
2. Make sure the video/audio tester is switched OFF.
3. Remove the seat back and disconnect the rear screen intermediate connector, VR02.
4. Turn the video/audio tester ON, and to the TEST position by holding in the TEST button while selecting PAL or NTSC. The blue and red LEDs will illuminate.
5. Turn the ignition switch to the ON position.
6. Using suitable adaptors, and an assistant if necessary, connect the red oscilloscope probe to VR02, pin 15 (RW).
7. Using suitable adaptors, and an assistant if necessary, connect the black oscilloscope probe to VR02, pin 09 (B).

- Is the waveform similar to the example in Waveforms in this section?

-> Yes
INSTALL a new harness between VR02 and VR01. Test the system for normal operation.

-> No

G240121t7 : CHECK THE CIRCUIT BETWEEN INTERMEDIATE CONNECTORS, VR02 AND TL91 FOR CONTINUITY
1. Turn the ignition switch to the OFF position.
2. Make sure the video/audio tester is switched OFF.
3. Disconnect the intermediate connector, TL91.
4. Using suitable adaptors, measure the resistance between TL91, pin 15 (RW) and VR02, pin 15 (RW).
5. Using suitable adaptors, measure the resistance between TL91, pin 09 (B) and VR02, pin 09 (09).

- Is either resistance greater than 5 ohms?

-> Yes
INSTALL a new harness between VR02 and TL91. Test the system for normal operation.

-> No
The harness from the audio/video selector module checks out, [[G240121p5]] and [[G240121p7]].