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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 702 (THEFT DETERRENT SYSTEM - DIAGNOSTICS)ECU POWER SOURCE CIRCUITINSPECTION PROCEDURE
2004 Toyota Matrix XR, FWD, Standard

Inspection Procedure

2004 Toyota Matrix XR, FWD, StandardSECTION Inspection Procedure
WARNING: This page is about a different car, the 2004 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT FUSE (ECU-B) 
    1. Remove the ECU-B fuse from the instrument panel J/B.
    2. Measure the resistance of the fuse.

      Standard: Below 1 Ω 

    1. NG : REPLACE FUSE 
    2. OK : Go to Next Step. 
  2. CHECK WIRE HARNESS (INSTRUMENT PANEL J/B ASSY - BATTERY) 
    1. Disconnect the 2I J/B connector.
    2. Measure the voltage of the wire harness side connector.
      Fig 1: Measuring Voltage Between 2I & Body Ground
      G03050102Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      CONNECTOR TERMINAL DESCRIPTION

      Tester Connection Specified Condition
      2I-7 - Body ground 10 to 14 V
    1. NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK : Go to Next Step. 
  3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY 
    1. Disconnect the 2I and 2H*1 or 2M*2 J/B connectors.
    2. Measure the resistance of the J/B.
      Fig 2: Measuring Resistance Between Instrument Panel J/B Assy
      G03050103Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      CONNECTOR TERMINAL DESCRIPTION

      Tester Connection Specified Condition
      2I-7 - 2H-2*1 Below 1 Ω
      2I-7 - 2M-14*2 Below 1 Ω
    1. NG : REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY 
    2. OK : Go to Next Step. 
  4. CHECK WIRE HARNESS (INSTRUMENT PANEL J/B ASSY - INSTRUMENT PANEL J/B ASSY AND BODY GROUND) 
    1. Disconnect the 2F, 2H**1 and 2M J/B connectors.
    2. Measure the resistance of the wire harness side connectors.
      Fig 3: Measuring Resistance Between Instrument Panel J/B Assy
      G03050104Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      CONNECTOR TERMINAL DESCRIPTION

      Tester Connection Specified Condition
      2F-1 - 2H-2(1) Below 1 Ω
      2F-1 - 2M-14(2) Below 1 Ω
      2M-9 - Body ground Below 1 Ω
      2F-10 - Body ground Below 1 Ω
      (1) : Coupe
      (2) : Convertible
    1. NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  ) 
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

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

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.