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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 433 (HV BATTERY CONTROL SYSTEM - DIAGNOSTICS)PRE-CHECK
2004 Toyota Matrix XR, FWD, Standard

Section 433 (HV Battery Control System - Diagnostics): Pre-Check

2004 Toyota Matrix XR, FWD, StandardSECTION Pre-Check
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.
  1. Precaution:
    1. To distinguish a trouble and replace a defective part, take necessary preventive measures against an electric shock. See REPAIR INSTRUCTIONS .
    2. Some portions of the wiring harness in the THS vehicle have the circuits, to which a high voltage is applied. To prevent an electrical shock, be sure to observe the following:
      1. Wear insulated gloves during inspection.
      2. Remove a service plug and do not start any repair operation before 5 minutes have passed, then confirm that the voltage at the output terminals has dropped down to 12 V or less.
      3. Use insulated tools during inspection.
      4. When disengaging wiring connectors, hold the connector bodies to avoid pulling the wires. When engaging wiring connectors, be sure to engage them securely.
        Fig 1: Identifying Service Plug & Service Plug Assembly
        G01112743Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Do not leave tools or parts (bolts, nuts, etc.) inside the cabin.
    4. Do not carry metallic objects such as mechanical pencils or scales.
  2. Diagnosis system:
    1. Description
      • The HV Battery ECU has a self-diagnosis system by which malfunction in the computer itself or in Hybrid System is detected and the master warning light in the combination meter and the Hybrid system warning light in the multi-information display lights up.
        Fig 2: Examples Of Malfunction Indicator Lights
        G01112744Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • To check the Diagnostic Trouble Codes (DTC), connect the TOYOTA hand-held tester to the Data Link Connector 3 (DLC3) on the vehicle. The TOYOTA hand-held tester also enables you to erase the DTC and check freeze frame data and various forms of THS data.
        Fig 3: Connecting Hand Held Tester To DLC3
        G01112745Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • Freeze frame data:
    2. Freeze frame data records the battery condition when a malfunction is detected.
    3. When troubleshooting, this is useful for knowing the battery condition.
    3. NOTE:

    If your display shows UNABLE TO CONNECT TO VEHICLE when you have connected the cable of the TOYOTA hand-held tester to the DLC3, turned the motor switch ON and operated the tester, there is a problem in the vehicle or tool.

    • If communication is normal when the tool is connected to another vehicle, inspect the DLC3 on the original vehicle.
    • If communication is still not possible when the tool is connected to another vehicle, the problem is probably in the tool itself, so consult the Service Department.
  3. Check the DLC3:
    1. The HV control ECU conforms to ISO 14230 for communication.
    2. The terminal arrangement of the DLC3 complies with SAEJ1962 and matches the ISO 14230 format.
      Fig 4: Identifying DLC3 Connector Terminals
      G01112746Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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  • • You are not confident in the next step or safety outcome.