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 MANUALSTOYOTA2009YARIS L4-1.5L (1NZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMKNOCK SENSORSERVICE AND REPAIRINSTALLATION
2009 Toyota Yaris L4-1.5L (1NZ-FE)
Installation
2009 Toyota Yaris L4-1.5L (1NZ-FE)SECTION Installation
1NZ-FE ENGINE CONTROL SYSTEM: KNOCK SENSOR: INSTALLATION
INSTALLATION
1. INSTALL KNOCK SENSOR
(a) Install the knock sensor with the nut as shown in the illustration.
Torque: 20 Nm (204 kgf-cm, 15 ft-lbf)
(b) Connect the knock sensor connector.
2. INSTALL INTAKE MANIFOLD
(a) Install a new gasket onto the intake manifold.
(b) Install the intake manifold with the 3 bolts and 2 nuts.
Torque: 30 Nm (304 kgf-cm, 22 ft-lbf)
(c) Connect the union to connector tube hose.
(d) Connect the ventilation hose.
(e) Install water by-pass hose No. 2.
(f) Install the engine wire harness onto the intake manifold.
3. INSTALL THROTTLE WITH MOTOR BODY ASSEMBLY Installation
4. CONNECT WATER BY-PASS HOSE NO. 2 Installation
5. CONNECT WATER BY-PASS HOSE Installation
6. INSTALL AIR CLEANER CAP SUB-ASSEMBLY WITH AIR CLEANER HOSE NO. 1 Installation
7. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
Torque: 5.4 Nm (55 kgf-cm, 48 in-lbf)
8. ADD ENGINE COOLANT Service and Repair
9. CHECK FOR ENGINE COOLANT LEAKAGE Testing and Inspection
10. INSTALL CYLINDER HEAD COVER NO. 2 Installation
RENDER: 1.0x
NO RELATED
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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.