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.
2009 Toyota Matrix Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Knock Sensor: Removal
- DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
- DRAIN ENGINE COOLANT (See COOLANT )
- REMOVE NO. 2 CYLINDER HEAD COVER (See REMOVAL )
- REMOVE AIR CLEANER CAP SUB-ASSEMBLY WITH HOSE (See REMOVAL )
- REMOVE INTAKE MANIFOLD
- Disconnect the throttle body connector and the 2 water by-pass hoses.
- Separate the wire harness clamp and remove the bolt and wire harness bracket.
- Separate the 2 hoses.
- Separate the ventilation hose.
- Separate the 2 wire harness clamps.
- Separate the 2 wire harness clamps.
- Remove the 4 bolts and 2 nuts and remove the intake manifold stay and intake manifold with throttle body.
- Remove the gasket from the intake manifold.
- REMOVE KNOCK SENSOR
- Disconnect the knock sensor connector.
- Remove the bolt and remove the knock sensor.
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.