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 MANUALSTOYOTA2004TACOMA PRERUNNER V6-3.4L (5VZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMKNOCK SENSORTESTING AND INSPECTION
2004 Toyota Tacoma PreRunner V6-3.4L (5VZ-FE)
Knock Sensor: Testing and Inspection
2004 Toyota Tacoma PreRunner V6-3.4L (5VZ-FE)SECTION Testing and Inspection
INSPECTION
1. DRAIN ENGINE COOLANT
2. REMOVE AIR CLEANER HOSE
3. REMOVE NO.2 TIMING BELT COVER
4. REMOVE INTAKE AIR CONNECTOR ASSEMBLY
5. REMOVE FUEL PRESSURE REGULATOR
6. REMOVE INTAKE MANIFOLD ASSEMBLY
7. REMOVE WATER BYPASS PIPE AND KNOCK SENSOR WIRE
8. REMOVE KNOCK SENSORS
Using SST, remove the knock sensor
SST 09817-16011
9. INSPECT KNOCK SENSORS
Using an ohmmeter, check that there is no continuity between the terminal and body.
If there is continuity, replace the sensor.
10. REINSTALL KNOCK SENSORS
Using SST, install the knock sensor
SST 09817-16011
Torque: 39 N.m (400 kgf.cm, 29 ft.lbf)
11. REINSTALL WATER BYPASS PIPE AND KNOCK SENSOR WIRE
12. REINSTALL INTAKE MANIFOLD ASSEMBLY
13. REINSTALL FUEL PRESSURE REGULATOR
14. REINSTALL INTAKE AIR CONNECTOR ASSEMBLY
15. REINSTALL NO.2 TIMING BELT COVER
16. REINSTALL AIR CLEANER HOSE
17. REFILL WITH ENGINE COOLANT
1. DRAIN ENGINE COOLANT
2. REMOVE AIR CLEANER HOSE
3. REMOVE NO.2 TIMING BELT COVER
4. REMOVE INTAKE AIR CONNECTOR ASSEMBLY
5. REMOVE FUEL PRESSURE REGULATOR
6. REMOVE INTAKE MANIFOLD ASSEMBLY
7. REMOVE WATER BYPASS PIPE AND KNOCK SENSOR WIRE
8. REMOVE KNOCK SENSORS
Using SST, remove the knock sensor
SST 09817-16011
9. INSPECT KNOCK SENSORS
Using an ohmmeter, check that there is no continuity between the terminal and body.
If there is continuity, replace the sensor.
10. REINSTALL KNOCK SENSORS
Using SST, install the knock sensor
SST 09817-16011
Torque: 39 N.m (400 kgf.cm, 29 ft.lbf)
11. REINSTALL WATER BYPASS PIPE AND KNOCK SENSOR WIRE
12. REINSTALL INTAKE MANIFOLD ASSEMBLY
13. REINSTALL FUEL PRESSURE REGULATOR
14. REINSTALL INTAKE AIR CONNECTOR ASSEMBLY
15. REINSTALL NO.2 TIMING BELT COVER
16. REINSTALL AIR CLEANER HOSE
17. REFILL WITH ENGINE COOLANT
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.