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 512 (ELECTRONICALLY CONTROLLED BRAKE SYSTEM - DIAGNOSIS)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 Prius. However, it is still accessible from the selected car via links, so may be relevant.

CHECK BATTERY VOLTAGE
1. Measure the battery voltage. Standard: 10 to 14 V
SKID CONTROL ECU ASSY INSPECTION
1. Measure the voltage between each terminal or between each terminal and the body ground.
2. Connect the hand-held tester to the DLC3, and check the communication condition with the skid control ECU.
3. Using an oscilloscope, check that the pulse generates between each terminal or between each terminal and the body ground.
NOTE:
- Inspection should be performed from the back of the connector with the connector connected to the skid control ECU.
- The voltage between terminals of the brake actuator assy may become 0 V due to the fail safe function when the ECB warning light comes on (malfunctioning).
SKID CONTROL ECU

Fig 1: Skid Control ECU Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

Inspect the ECU from the wire harness side while the connector is connected.

Fig 2: Skid Control ECU Assembly Inspection Table (1 Of 3)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.