Engine Compartment Junction & Relay Blocks

2004 Toyota Matrix XR, FWD, StandardSECTION Engine Compartment Junction & Relay Blocks
WARNING: This page is about a different car, the 2002 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Relay block is located in engine compartment. See Fig 1. For description of electrical power distribution, see Fig 2.

Component Locations

  • Engine compartment relay block is located at left center of engine compartment. See Fig 1. Relay block contains fuses and relays. For identification of components, see Fig 3. For identification of protected circuits, see table below. For wiring diagrams of engine compartment relay block circuits, see POWER DISTRIBUTION in SYSTEM WIRING DIAGRAMS article.
Fig 1: Locating Engine Compartment Relay Block
G00313604Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
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:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.