DESCRIPTION
When the navigation system is activated with the light control switch in the tail or head position, before AVC-LAN communication is established, the multi-display assembly dims the display according to the illumination signal received via a direct line.
After AVC-LAN communication is established, the multi-display assembly dims the display according to a dimmer signal sent via AVC-LAN communication.
The radio receiver assembly switches between the daytime screen and night screen on the multi-display assembly according to the illumination signal input.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
1. | CHECK SYMPTOMS |
(a) Check the symptoms that occur by viewing the display.
Result | Proceed to |
---|---|
There is a delay until the display dims after the navigation system is activated with the light control switch in the tail or head position. | A |
The display dims for a moment and then becomes bright after the navigation system is activated with the light control switch in the tail or head position. | B |
When the light control switch is set to the tail or head position, the display dims but does not switch to the night screen. | |
When the light control switch is set to the tail or head position, the display neither dims nor switches to the night screen. | C |
HINT:
B | ![]() | GO TO STEP 3 |
C | ![]() | GO TO LIGHTING SYSTEM |
|
2. | CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL) |
(a) Disconnect the J56 multi-display assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
J56-13 (GND1) - Body ground | Always | Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Condition | Specified Condition |
---|---|---|
J56-2 (ILL) - J56-13 (GND1) | Light control switch in tail or head position | 11 to 14 V |
OK | ![]() | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
3. | CHECK IMAGE QUALITY SETTING |
(a) Turn the light control switch to the tail or head position.
(b) Check that the daytime screen setting on the display adjustment screen is set to on.
Result | Proceed to |
---|---|
Daytime screen setting is set to on. | A |
Daytime screen setting is set to off. | B |
A | ![]() | CHANGE DAYTIME SCREEN SETTING TO OFF |
|
4. | CHECK VEHICLE SIGNAL (OPERATION CHECK) |
(a) Enter the "Vehicle Signal Check Mode" screen. Refer to Check Vehicle Signal in Operation Check. Click here |
|
(b) Check that the display changes between ON and OFF according to the light control switch operation.
OK:
Light Control Switch | Display |
---|---|
Tail or head | ON |
Off or AUTO | OFF |
HINT:
OK | ![]() | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
5. | CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL) |
(a) Disconnect the J151 and J148 radio receiver assembly connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
J148-1 (GND1) - Body ground | Always | Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Condition | Specified Condition |
---|---|---|
J151-15 (ILL+) - J148-1 (GND1) | Light control switch in tail or head position | 11 to 14 V |
OK | ![]() | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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