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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 634 (MULTIPLEX COMMUNICATION SYSTEM - DIAGNOSTICS)PRE-CHECK
2004 Toyota Matrix XR, FWD, Standard

Section 634 (Multiplex Communication System - Diagnostics): Pre-Check

2004 Toyota Matrix XR, FWD, StandardSECTION Pre-Check
WARNING: This page is about a different car, the 2004 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.
  1. MULTIPLEX COMMUNICATION SYSTEM (BEAN) 
    1. BEAN communication line is used to control the theft warning ECU (theft deterrent ECU). Since the line connects the body and theft warning ECU (theft deterrent ECU) with one line, the communication goes one way from the theft warning ECU (theft deterrent ECU) to the body ECU.
  2. INSPECT OUTPUT OF DIAGNOSTIC BY DOOR OPEN INDICATOR 
    1. Inspect the battery positive voltage.

      Standard: 10 - 14 V (when engine stopped) 

    2. Check that the diagnostic outputs.
      NOTE: No abnormality exists in all the following items.
      1. Check that the door open indicator will be on when any of the doors is opened.

        HINT:

        In case that the indicator will not be on, the following problems are possible reasons; door open indicator LED defective, wire harness short, courtesy light switch's contact condition defective, multiplex network body ECU defective, etc.

      2. By using SST (diagnosis check wire No. 2), make a short-circuit between terminals TC (13) and CG (4) of the DLC3.

        SST 09843-18040

        NOTE: Do not make a short-circuit in any other positions.
RENDER: 1.0x

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