Display Signal Circuit Between Navigation ECU and Multi-Display

NAVIGATION: NAVIGATION SYSTEM: Display Signal Circuit between Navigation ECU and Multi-display
- Display Signal Circuit between Navigation ECU and Multi-display

DESCRIPTION

This is the display signal circuit from the navigation ECU to the multi-display.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - MULTI-DISPLAY)

(a) Disconnect the navigation ECU connector L17 and multi-display connector E8.





(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. INSPECT NAVIGATION ECU (OUTPUT SIGNAL)

(a) Reconnect the navigation ECU connector L17.





(b) Measure the waveform according to the table below.

Standard:





HINT
* If SYNC signals are not being input to the multi-display due to an open circuit or other causes, the green initial screen may seem pinkish-green.
* The waveform pattern may differ from those shown in the illustrations below due to differences in oscilloscope settings. A normal navigation ECU operating condition can be determined if any waveform is output.
(1) Oscilloscope wave









(2) Oscilloscope wave









NG -- REPLACE NAVIGATION ECU

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE