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.

2007 Toyota Matrix Base, AutomaticFACTORY OEM SERVICE PROCEDURE

EFI Relay: Inspection

INSPECT EFI ECU RELAY

Check the resistance.

Using an ohmmeter, measure the resistance between the terminals.

Resistance

RESISTANCE SPECIFICATIONS

Tester Connection	Specified Condition
3-5	10 kΩ or higher
3-5	Below 1 Ω (Apply battery voltage to terminal 1 and 2)

Fig 1: Inspecting EFI ECU Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the result is not as specified, replace the EFI ECU relay.

Factory Service Tools

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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.

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