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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 447 (MULTIPLEX COMMUNICATION SYSTEM - DIAGNOSTICS)CIRCUIT INSPECTIONDTC B1274/74: MULTI DISPLAY COMMUNICATION STOPWIRING DIAGRAM
2004 Toyota Matrix XR, FWD, Standard

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

2004 Toyota Matrix XR, FWD, StandardSECTION 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.
  1. Check multi display ECU. 

    CHECK:  that the multi display operate normally.

    1. NG:  Replace the multi display.
    2. OK:  Go to  2.
  2. Check wire harness. 
    Fig 1: Testing Multi Display To Gateway ECU Wire Harness For Continuity
    G01113028Courtesy 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.
RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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