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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 704 (CAN COMMUNICATION SYSTEM - DIAGNOSTICS)CHECK CAN BUS LINEINSPECTION 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. CHECK CAN BUS LINE (MAIN BUS LINE FOR DISCONNECTION, BUS LINES FOR SHORT CIRCUIT, DLC3 SUB BUS LINE FOR DISCONNECTION) 
    1. Turn the ignition switch to the LOCK position.
    2. Measure the resistance according to the value(s) in DLC3 RESISTANCE SPECIFICATION TABLE  .

    Standard: 

    DLC3 RESISTANCE SPECIFICATION TABLE

    Tester connection Condition Specified value Result
    D3-6 (CANH) - D3-14 (CANL) Ignition SW OFF 54 to 67 Ω OK
    D3-6 (CANH) - D3-14 (CANL) Ignition SW OFF 67 Ω or more NG-A
    D3-6 (CANH) - D3-14 (CANL) Ignition SW OFF 54 Ω or less NG-B
    Fig 1: Identifying DLC3 Connectors
    G03050198Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG-A : CHECK CAN MAIN BUS LINE FOR DISCONNECTION (SEE  CHECK CAN MAIN BUS LINE FOR DISCONNECTION  ) 
    2. NG-B : CHECK CAN BUS LINES FOR SHORT CIRCUIT (SEE  CHECK CAN BUS LINES FOR SHORT CIRCUIT  ) 
    3. OK: Go to Next Step. 
  2. CHECK CAN BUS LINE (CAN-H) FOR SHORT TO +B 
    1. Measure the resistance according to the value(s) in TERMINAL RESISTANCE SPECIFICATION TABLE  .

    Standard: 

    TERMINAL RESISTANCE SPECIFICATION TABLE

    Tester connection Condition Specified value
    D3-6 (CANH) - D3-16 (BAT) Ignition SW OFF 1 MΩ or more
    Fig 2: Checking CAN Bus Line (CAN-H) For Short To +B
    G03050199Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: CHECK CAN BUS LINE (CAN-H) FOR SHORT TO +B (SEE  CHECK CAN BUS LINE (CAN-H) FOR SHORT TO +B  ) 
    2. OK: Go to Next Step. 
  3. CHECK CAN BUS LINE (CAN-L) FOR SHORT TO +B 
    1. Measure the resistance according to the value(s) in CAN BUS LINE (CAN-L) RESISTANCE SPECIFICATION TABLE  .

    Standard: 

    CAN BUS LINE (CAN-L) RESISTANCE SPECIFICATION TABLE

    Tester connection Condition Specified value
    D3-14 (CANL) - D3-16 (BAT) Ignition SW OFF 1 MΩ or more
    Fig 3: Checking CAN Bus Line (CAN-L) For Short To +B
    G03050200Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: CHECK CAN BUS LINE (CAN-L) FOR SHORT TO +B (SEE  CHECK CAN BUS LINE (CAN-L) FOR SHORT TO +B  ) 
    2. OK: Go to Next Step. 
  4. CHECK CAN BUS LINE (CAN-H) FOR SHORT TO GND 
    1. Measure the resistance according to the value(s) in CAN BUS LINE (CAN-H) RESISTANCE SPECIFICATION TABLE  .

    Standard: 

    CAN BUS LINE (CAN-H) RESISTANCE SPECIFICATION TABLE

    Tester connection Condition Specified value
    D3-4 (CG) - D3-6 (CANH) Ignition SW OFF 3 kΩ or more
    Fig 4: Checking CAN Bus Line (CAN-H) For Short To GND
    G03050201Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: CHECK CAN BUS LINE (CAN-H) FOR SHORT TO GND (SEE  CHECK CAN BUS LINE (CAN-H) FOR SHORT TO GND  ) 
    2. OK: Go to Next Step. 
  5. CHECK CAN BUS LINE (CAN-L) FOR SHORT TO GND 
    1. Measure the resistance according to the value(s) in CAN BUS LINE (CAN-L) RESISTANCE SPECIFICATION TABLE  .

    Standard: 

    CAN BUS LINE (CAN-L) RESISTANCE SPECIFICATION TABLE

    Tester connection Condition Specified value
    D3-4 (CG) - D3-14 (CANL) Ignition SW OFF 3 kΩ or more
    Fig 5: Checking CAN Bus Line (CAN-L) For Short To GND
    G03050202Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: CHECK CAN BUS LINE (CAN-L) FOR SHORT TO GND (SEE  CHECK CAN BUS LINE (CAN-L) FOR SHORT TO GND  ) 
    2. OK: HOW TO PROCEED WITH TROUBLESHOOTING (SEE  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
RENDER: 1.0x

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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.