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 150 (BODY CONTROL SYSTEMS)COMPONENT TESTSPOWER MAIN RELAY
2004 Toyota Matrix XR, FWD, Standard
Power Main Relay
2004 Toyota Matrix XR, FWD, StandardSECTION Power Main Relay
WARNING: This page is about a different car, the 2002 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Power main relay may also be referred to as power or PWR relay.
- Turn ignition off. Remove power main relay from driver side junction block. See Figure.
- Note identification of electrical terminals on power main relay. See Fig 1. Using ohmmeter, check that no continuity exists between terminals No. 3 and 5 on power main relay. Check that continuity exists between terminals No. 1 and 2 on power main relay.
- Using jumper wires, apply battery voltage and ground to terminals No. 1 and 2 on power main relay. Check that continuity now exists between terminals No. 3 and 5 on power main relay. See Fig 1. If continuity is not as specified, replace power main relay.
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.