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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 770 (ENGINE CONTROL SYSTEM - DIAGNOSIS)CIRCUIT INSPECTIONTC TERMINAL 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 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

  • Even though terminal TC is not connected with terminal CG, the MIL blinks.
  • For the above phenomenon, an open or short in the wire harness, or a malfunction inside the ECM is a likely cause.
  1. Check voltage between terminals TC and CG of DLC3. 

    PREPARATION: 

    Turn the ignition switch ON.

    CHECK: 

    Measure the voltage between terminals TC and CG of the DLC3.

    Fig 1: Measuring Voltage Between Terminals TC & CG Of DLC3
    G01496516Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: 

    Voltage: 9-14 V 

    1. OK: Check and replace ECM (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
    2. NG: Go to next step. 
  2. Check continuity between CG of DLC3 and body ground. 
    1. NG: Repair or replace harness or connector. 
    2. OK: Go to next step. 
  3. Check for open and short circuit in harness and connector between ECM and DLC3, and DLC3 and body ground (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
    1. NG: Repair or harness or connector. 
    2. OK: Check and replace ECM (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
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.