DTC B1274/74: Multi Display Communication Stop: Wiring Diagram

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.

See Figure.

INSPECTION PROCEDURE

NOTE: With this inspection, the multi display CPU can be diagnosed if it works normally or not.

Check multi display ECU.
CHECK: that the multi display operate normally.
1. NG: Replace the multi display.
2. OK: Go to 2.
Check wire harness.

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

PREPARATION: Disconnect connector "M2" of multi display and "G1" of gateway ECU.

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

If there is OPEN in wire harness, please repair it.
1. NG: Repair or replace wire harness.
2. OK: Replace the multi display.