Inspection Procedure

WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

Check "Service check mode" of audio system. (AVC-LAN diagnosis check) . See NAVIGATION SYSTEM PRE-CHECK .
CHECK: Connection of the gateway ECU can be checked by AVC-LAN diagnosis. ("Service check mode" of audio system)

OK:
Display
1. G/W: OK (System is normal)
2. G/W: NG (Communication error)
3. G/W: None (Never registered)
1. NG: Replace the gateway ECU.
2. OK: Go to 2 .
Check wire harness
PREPARATION: Disconnect connector "G1" of gateway ECU and "M2" of multi display.

Fig 1: Testing Multi Display To Gateway ECU Wire Harness For Continuity
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK
1. Check continuity between terminals GTX+ of gateway ECU and TX3+ of multi display.
2. Check continuity between terminals GTX- of gateway ECU and TX3- of multi display.
OK: There is a continuity in wire harness of both ( a and ( b, or either ( a or ( b.

NOTE: If there is OPEN in wire harness of either ( a or ( b, please repair it.
1. NG: Repair or replace wire harness.
2. OK: Replace the gateway ECU.