Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 630 (WIRELESS DOOR LOCK CONTROL SYSTEM - DIAGNOSTICS)TERMINALS OF ECU

2004 Toyota Matrix XR, FWD, Standard

Terminals Of Ecu

2004 Toyota Matrix XR, FWD, StandardSECTION Terminals Of Ecu

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.

CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSY (BODY ECU) (LEFT SIDE)

Fig 1: Identifying Instrument Panel Junction Block Assy Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the B6 body ECU connector, and check the continuity of each terminal of the wire harness side connector.
  Standard:
  
  Fig 2: Terminal Continuity Specifications Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the result is not as specified, there may be a malfunction on the wire harness side.
2. Reconnect the B6 body ECU connector, and check the voltage of each terminal of the connectors.
  Standard:
  
  Fig 3: Terminal Voltage Specifications Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the result is not as specified, the body ECU may be defective.
CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSY (BODY ECU) (REAR SIDE)

Fig 4: Identifying Instrument Panel Junction Block Assy Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the 2B, 2F and 2G instrument panel J/B connectors, and check the continuity and voltage of each terminal of the disconnected connector.
  Standard:
  
  Fig 5: Terminal Voltage & Continuity Specifications Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the result is not as specified, there may be a malfunction on the wire harness side.
2. Reconnect the 2B, 2F and 2G instrument panel J/B connectors, and check the voltage of each terminal of the connectors.
  Standard:
  
  Fig 6: Terminal Voltage Specifications Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the result is not as specified, the vehicle may be defective. In this case, check the harness, connector and fuse between the ECU and battery. Then repair or replace it if necessary.

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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.