Check the PAL Signal At the the Left-Hand Screen

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

G240121t8 : CHECK THE PAL SIGNAL AT THE LEFT-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 left-hand screen?

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

-> No

G240121t9 : CHECK THE SIGNAL TO THE LEFT-HAND REAR SCREEN INTERMEDIATE CONNECTOR TL91
1. Reposition the left-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, TL92.
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 TL92, pin 15 (RW).
9. Using suitable adaptors, and an assistant if necessary, connect the black oscilloscope probe to TL92, pin 09 (B).

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

-> Yes
-> No

G240121t10 : CHECK THE CIRCUIT FROM THE AUDIO VIDEO SELECTOR MODULE 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, TL85.
4. Using suitable adaptors, measure the resistance between TL92, pin 15 (RW) and TL85, pin 15 (RW).
5. Using suitable adaptors, measure the resistance between TL92, pin 09 (B) and TL85, 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]].

G240121t11 : CHECK THE SIGNAL TO THE LEFT-HAND REAR SCREEN CONNECTOR VL01
1. Turn the ignition switch to the OFF position.
2. Make sure the video/audio tester is switched OFF.
3. Reconnect the intermediate connector, TL92.
4. Reconnect the audio video module electrical connector, TL85.
5. Disconnect the screen connector, VL01.
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 VL01, pin 15 (RW).
9. Using suitable adaptors, and an assistant if necessary, connect the black oscilloscope probe to VL01, pin 09 (B).

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

-> Yes
INSTALL a new rear screen,

-> No

G240121t12 : CHECK THE SIGNAL TO THE LEFT-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 VL02, pin 15 (RW).
7. Using suitable adaptors, and an assistant if necessary, connect the black oscilloscope probe to VL02, pin 09 (B).

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

-> Yes
INSTALL a new harness between VL02 and VL01. Test the system for normal operation.

-> No

G240121t13 : CHECK THE CIRCUIT BETWEEN INTERMEDIATE CONNECTORS, VL02 AND TL92 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, TL92.
4. Using suitable adaptors, measure the resistance between TL92, pin 15 (RW) and VL02, pin 15 (RW).
5. Using suitable adaptors, measure the resistance between TL92, pin 09 (B) and VL02, pin 09 (09).

- Is the resistance greater than 5 ohms?

-> Yes
INSTALL a new harness between VL02 and TL92. Test the system for normal operation.

-> No
The harness from the audio/video selector module checks out, [[G240121p5]] and [[G240121p6]].