Check the Signal/Circuit Rear Entertainment Control Panel

: CHECK THE SIGNAL/CIRCUIT THROUGH THE REAR ENTERTAINMENT CONTROL PANEL

G240121t15 : CHECK THE SIGNAL THROUGH THE CONTROL PANEL
1. Turn the ignition switch to the OFF position.
2. Make sure the video/audio tester is switched OFF.
3. Disconnect the control panel electrical connector, RC03.
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. Connect the oscilloscope. Refer to Oscilloscope set-up procedure in this section.
6. Turn the ignition switch to the ON position.
7. Using suitable adaptors, and an assistant if necessary, connect the red oscilloscope probe to RC03, pin 18 (probing INTO the control panel).
8. Using suitable adaptors, and an assistant if necessary, connect the red oscilloscope probe to RC03, pin 20 (probing INTO the control panel).

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

-> Yes

-> No
For further control panel tests, [[G240121p5]], [[G240121p6]] and [[G240121p7]].

G240121t16 : CHECK THE SIGNAL THROUGH THE REAR ENTERTAINMENT CONTROL PANEL TO INTERMEDIATE CONNECTOR, RC04
1. Turn the ignition switch to the OFF position.
2. Make sure the video/audio tester is switched OFF.
3. Reconnect the control panel electrical connector, RC03.
4. Disconnect intermediate connector, RC04.
5. 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.
6. Connect the oscilloscope. Refer to Oscilloscope set-up procedure in this section.
7. Turn the ignition switch to the ON position.
8. Using suitable adaptors, and an assistant if necessary, connect the red oscilloscope probe to RC04, pin 18 (YB).
9. Using suitable adaptors, and an assistant if necessary, connect the red oscilloscope probe to RC04, pin 20 (B).

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

-> Yes
-> No

G240121t17 : CHECK THE HARNESS BETWEEN RC03 AND RC04 FOR CONTINUITY
1. Turn the ignition switch to the OFF position.
2. Make sure the video/audio tester is switched OFF.
3. Disconnect the control panel electrical connector, RC03.
4. Measure the resistance between RC03, pin 18 (YB) and RC04, pin 18 (YB).
5. Measure the resistance between RC03, pin 20 (B) and RC04, pin 20 (B).

- Is either resistance greater than 5 ohms?

-> Yes
INSTALL a new harness between RC03 and RC04. TEST the system for normal operation.

-> No
RECHECK all connections and harnesses, as no fault has been confirmed. TEST the system for normal operation.

G240121t18 : CHECK THE HARNESS BETWEEN TL86 AND RC04 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 selector electrical connector, TL86.
4. Measure the resistance between RC04, pin 18 (YB) and TL86, pin 18 (YB).
5. Measure the resistance between RC04, pin 20 (B) and TL86, pin 20 (B).

- Is either resistance greater than 5 ohms?

-> Yes
INSTALL a new harness between TL86 and RC04. TEST the system for normal operation.

-> No

G240121t19 : CHECK THE AC ON/OFF CONTROL TO THE AUDIO VIDEO SELECTOR MODULE AT CONNECTOR TL86
1. Make sure the ignition switch is in the OFF position.
2. Reconnect the control panel electrical connector, RC04.
3. Measure the resistance between TL86, pin 06 (RG) and GROUND.

- Is the resistance greater than 5 ohms?

-> Yes
-> No

G240121t20 : CHECK THE AC ON/OFF CONTROL TO THE AUDIO VIDEO SELECTOR MODULE AT CONNECTOR RC04
1. Make sure the ignition switch is in the OFF position.
2. Disconnect the intermediate connector, RC04.
3. Measure the resistance between RC04, pin 06 (RG) and GROUND.

- Is the resistance greater than 5 ohms?

-> Yes

-> No
INSTALL a new harness between TL86 and RC04. TEST the system for normal operation.

G240121t21 : CHECK THE AC ON/OFF CONTROL TO THE AUDIO VIDEO SELECTOR MODULE AT THE CONTROL PANEL
1. Make sure the ignition switch is in the OFF position.
2. Disconnect the control panel electrical connector, RC03.
3. Measure the resistance between RC03, pin 06 (probing into the control panel) and GROUND.

- Is the resistance greater than 5 ohms?

-> Yes

-> No
INSTALL a new harness between RC03 and RC04. TEST the system for normal operation.

G240121t22 : CHECK THE ACCESSORY POWER SUPPLY TO THE CONTROL PANEL
1. Make sure the ignition switch is in the OFF position.
2. Disconnect the control panel electrical connector, RC01.
3. Turn the ignition switch to the ACC position.
4. Measure the voltage between RC01, pin 07 (YU) and GROUND.

- Is the voltage less than 10 volts?

-> Yes
REPAIR the circuit between RC01, pin 07 and battery. This circuit includes the primary junction box (fuse 20).

-> No

G240121t23 : CHECK THE PERMANENT POWER SUPPLY TO THE CONTROL PANEL
1. Turn the ignition switch to the OFF position.
2. Measure the voltage between RC01, pin 04 (RW) and GROUND.

- Is the voltage less than 10 volts?

-> Yes
REPAIR the circuit between RC01, pin 04 and battery. This circuit includes the primary junction box (fuse 30). TEST the system for normal operation.

-> No

G240121t24 : CHECK THE GROUND TO THE CONTROL PANEL
1. Measure the resistance between RC01, pin 08 (B) and GROUND.

- Is the resistance greater than 5 ohms?

-> Yes
REPAIR the high resistance circuit, TEST the system for normal operation.

-> No
INSTALL a new control panel, TEST the system for normal operation.

G240121t25 : CHECK THE AC ON/OFF CONTROL TO THE AUDIO VIDEO SELECTOR MODULE AT CONNECTOR TL86, IGNITION ON
1. Turn the ignition switch to the ON position.
2. Measure the voltage between TL86, pin 06 (RG) and GROUND.

- Is the voltage less than 10 volts?

-> Yes

-> No
For further control panel tests, [[G240121p5]], [[G240121p6]] and [[G240121p7]].

G240121t26 : CHECK THE AC ON/OFF CONTROL TO THE AUDIO VIDEO SELECTOR MODULE FOR SHORT TO GROUND (TL86)
1. Disconnect the control panel electrical connector, RC03.
2. Measure the resistance between TL86, pin 06 (RG) and GROUND.

- Is the resistance less than 10,000 ohms?

-> Yes

-> No
INSTALL a new control panel, TEST the system for normal operation.

G240121t27 : CHECK THE AC ON/OFF CONTROL TO THE AUDIO VIDEO SELECTOR MODULE FOR SHORT TO GROUND (RC04)
1. Disconnect the intermediate connector, RC04.
2. Measure the resistance between TL86, pin 06 (RG) and GROUND.

- Is the resistance less than 10,000 ohms?

-> Yes
INSTALL a new harness between TL86 and RC04. TEST the system for normal operation.

-> No
INSTALL a new harness between RC03 and RC04. TEST the system for normal operation.