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.
2012 Toyota Matrix FWD L4-2.4L (2AZ-FE)FACTORY OEM SERVICE PROCEDURE
Installation
2AZ-FE ENGINE CONTROL: INTEGRATION RELAY: INSTALLATION
1. INSTALL INTEGRATION NO.2 RELAY
(a) Connect the 3 connectors.
(b) Push the integration relay into the engine room relay block.
(c) Install the No. 1 relay block cover.
2. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.