Lexus RX300 (MCU15). Service manual - part 384

DI–766

–

DIAGNOSTICS

LEXUS NAVIGATION SYSTEM

LEXUS RX300   (RM785E)

OK

Replace the multi display.

–

DIAGNOSTICS

LEXUS NAVIGATION SYSTEM

DI–767

LEXUS RX300   (RM785E)

7. Navigation screen not stabilized (Synchronous error).

INSPECTION PROCEDURE

1

Check the navigation ECU.

CHECK:
Check terminals +B.
OK:

+B: 10 – 14 V

CHECK:
Check terminal ACC when turn ignition switch ACC or ON position.
OK:

ACC: 10 – 14 V

CHECK:
Check terminal SYNC, VR or VG.
OK:

SYNC, VR, VG: See ”Navigation ECU” of ”TERMINAL OF ECU”

NG

Replace the wire harness when all terminals are
faulty. Replace the wire harness when the SYNC
terminal is faulty.

OK

Replace the multi display.

DI7P0–02

DI–768

–

DIAGNOSTICS

LEXUS NAVIGATION SYSTEM

LEXUS RX300   (RM785E)

8. Color on navigation screen is unusual (RGB signal error).

INSPECTION PROCEDURE

1

Display check mode (Color bar check).

NG

Replace the multi display.

2

Navigation check mode (Color bar check).

NG

Go to step 4.

OK

3

Check the screen setting. (Day or Night mode)

OK

Normal.

NG

4

Check the navigation ECU.

CHECK:
Check terminals +B.
OK:

+B: 10 – 14 V

CHECK:
Check terminal ACC when turn ignition switch ACC or ON position.
OK:

ACC: 10 – 14 V

CHECK:
Check terminal R, G, B, VR or VG.
OK:

R, G, B, VR or VG: See ”Navigation ECU” of ”TERMINAL OF ECU”

NG

Replace the wire harness when all terminals are
faulty. Replace the wire harness when SYNC ter-
minal is faulty.

DI7P1–02

–

DIAGNOSTICS

LEXUS NAVIGATION SYSTEM

DI–769

LEXUS RX300   (RM785E)

OK

Replace the multi display.