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 746 (CAN COMMUNICATION SYSTEM - DIAGNOSIS)CHECK CAN MAIN BUS LINE FOR DISCONNECTIONINSPECTION 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 ES 330. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DLC3
1. Turn the ignition switch to the LOCK position.
2. Measure the resistance according to the value(s) in Fig 2 below.
  
  Fig 1: Identifying Connector Terminals Of DLC3
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Result:
  
  Fig 2: DLC3 Tester Connection Reference Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NOTE: When the measured value is 132 Ω or more and the CAN communication system diagnostic code is output, there may be a fault besides disconnection of the DLC3 sub bus line. For that reason, troubleshooting should be performed again from "How to proceed with troubleshooting" after repairing the trouble area.

B: REPAIR OR REPLACE DLC3 SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L)

A: Go to next step.
CHECK CAN MAIN BUS LINE FOR DISCONNECTION (SKID CONTROL ECU - JUNCTION CONNECTOR)
1. Disconnect the connector (S1) from the skid control ECU.
2. Measure the resistance according to the value(s) in Fig 4 below.
  
  Fig 3: Identifying Connector Terminals Of Skid Control ECU
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 4: Skid Control ECU Tester Connection Reference Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK: REPLACE SKID CONTROL ECU WITH ACTUATOR (SEE REPLACEMENT )

NG: Go to next step.
CHECK CAN MAIN BUS LINE FOR DISCONNECTION (JUNCTION CONNECTOR)
1. Disconnect the connector (J16, J17, J18, J19) from the steering sensor.
2. Measure the resistance according to the value(s) in Fig 6 below.
  
  Fig 5: Identifying Connector Terminals Of Junction Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 6: Junction Connector Tester Connection Reference Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK: REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN-H, CAN-L)

NG: REPLACE JUNCTION CONNECTOR

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.