Knock (Detonation) Sensor
Faults in detonation sensor circuit may set Code 34. To test system, see CODE 34 diagnostic procedures in TESTS W/CODES - 2.4L article.
To test sensor, disconnect sensor connector. See DETONATION SENSOR LOCATION table. Check continuity between ground and sensor connector terminal. If there is no continuity, replace sensor. Check detonation sensor shield ground wire for continuity to ground. Ensure detonation sensor wire is not routed near spark plug wires or high-output electrical accessories. Discard any knock sensor which has been dropped or undergone shocks.
DETONATION SENSOR LOCATION
| Application | Location | |
|---|---|---|
| Altima & 240SX | On Right Side Of Cylinder Block, Below Intake Manifold | |
| Maxima | ||
| VG30E Engine | On Oil Filter Side Of Cylinder Block, Below Exhaust Manifold | |
| VE30DE Engine | On Top Of Cylinder Block | |
| NX & Sentra (2.0L) | On Intake Side Of Cylinder Block | |
| Pathfinder, Pickup (3.0L) & Quest | On Top Of Cylinder Block | |
| 300ZX | On Top Of Cylinder Block | |