2026 Renault Aventime Crankshaft Positon Sensor Location Diagram
On the Renault Avantime (2.0L F4Rt or 3.0L L7X V6), the crankshaft position (CKP) sensor is positioned atop the transmission bellhousing, facing the flywheel ring gear teeth. It connects to the engine ECU via a 2-pin connector. Always apply a torque spec of 8–10 Nm during reinstallation to prevent sensor signal drift.
📌 Key Takeaways
- Sensor bolt standard torque spec is 8–10 Nm into the bellhousing.
- Located directly over the flywheel ring gear on the upper gearbox casing.
- Generates an AC sine wave signal between 200–300 Hz at idle sent to the ECU.
- Sensor failure triggers OBD-II diagnostic code P0335 and illuminates the check engine light.
- Clean metal shavings off magnetic tip before replacement; consult a mechanic if wiring harness is damaged.
The Renault Avantime, produced between 2001 and 2003, features complex engine bay packaging across its 3.0L L7X V6, 2.0L F4Rt Turbo, and 2.2L dCi G9T powertrains. Pinpointing the exact position of the crankshaft position sensor (also designated as the Top Dead Center/TDC sensor or PMH sensor) is essential for resolving intermittent stalling, crank-no-start conditions, and engine control unit synchronization failures. Located near the transmission bellhousing interface, accessing this critical sensor requires navigating tight clearances adjacent to primary engine cooling channels and electrical harnesses.
Renault Aventime Crankshaft Positon Sensor Location Diagram and Engine Component Layout
Locating the crankshaft position sensor on the Renault Avantime requires referencing key mechanical landmarks where the engine block intersects the transmission casing. Because the Avantime shares its transverse architectural layout with the Renault Espace III, space between the inner wing and the engine accessories is extremely limited. On the primary engine variant—the 3.0-liter 24-valve L7X V6—the sensor is mounted directly onto the upper perimeter of the clutch bellhousing (or torque converter housing on automatic SU1 variants), positioned immediately above the engine flywheel ring gear.
To pinpoint the sensor using visual landmarks, look beneath the main thermostat housing assembly on the flywheel end of the engine. The sensor is bolted into a dedicated cast mounting flange on the crankcase joint, secured by a single M6 hex head bolt. It sits directly below the primary upper radiator hose branch where engine coolant flow exits the head toward the radiator. On 2.0L F4Rt 4-cylinder models, the sensor is situated on the front-facing upper edge of the gearbox bellhousing, underneath the plastic intake trunking and beneath the shift cable bracket array.
On L7X V6 models equipped with the 5-speed automatic transmission (Aisin AW55-50SN / SU1), heat buildup near the back of the cylinder bank can cause the plastic housing of the OEM inductive sensor to degrade over time. When replacing the unit, verify that the replacement sensor includes the metallic thermal shield shroud and blue silicone harness seal specified in OEM Service Bulletin NT-3784A.
The sensor interfaces directly with the teeth of the engine flywheel or flexplate. As shown in the diagram above, the 60-2 tooth target wheel passes within an air gap tolerance of 0.5 mm to 1.2 mm from the magnetic pole piece of the sensor. The physical proximity to the lower engine block means the wiring connector is frequently exposed to residual road debris and seepage from the valve cover gaskets.
| Engine Variant | Sensor Type | OEM Part Reference | Resistance Range (20°C) | Mounting Torque Spec |
|---|---|---|---|---|
| 3.0L V6 (L7X 722 / 731) | 2-Pin Inductive (VR) | 7700101970 / 8200647554 | 200 – 280 Ω | 8.5 Nm (75 in-lbs) |
| 2.0L Turbo (F4Rt 790) | 2-Pin Inductive (VR) | 7700103061 / 8200439399 | 210 – 290 Ω | 8.0 Nm (71 in-lbs) |
| 2.2L dCi (G9T 712) | 3-Pin Hall Effect | 8200038472 | Active Wave (Voltage Test) | 9.0 Nm (80 in-lbs) |
Check Engine Light and Diagnostic Code Trigger Patterns for Sensor Failure
When the crankshaft position sensor experiences thermal breakdown, internal coil degradation, or magnetic pole contamination, the engine management system immediately detects a loss of primary timing synchronization. The engine control unit (ECU) relies on this variable reluctance signal to calculate engine speed, dictate precise ignition timing events, and sequence sequential fuel injection pulses. A missing or corrupted signal halts fuel pump relay engagement within 200 milliseconds of engine revolution failure.
A failing sensor manifests through specific performance anomalies and illuminated instrument cluster indicators. Drivers will typically experience the check engine light flickering under load or illuminating solid upon hot engine restarts. Common operational symptoms include:
- Engine Cranking Without Ignition: The starter motor turns the engine over normally, but the engine fails to fire because the ECU cannot determine cylinder 1 Top Dead Center (TDC) position.
- Abrupt Thermal Stalling: The engine operates smoothly until reaching operating temperature (~90°C), at which point internal thermal expansion opens a micro-fracture inside the sensor pickup coil, instantly severing the signal.
- Tachometer Drop: During acceleration, the tachometer needle abruptly drops to zero RPM milliseconds before the engine stutters or cuts out completely.
- Rough Idle and RPM Surge: Incorrect pulse timing causes sporadic ignition timing retard, resulting in engine misfires that feel similar to erratic oil pressure drop or fuel starvation.
Do not continuously crank the engine if a crankshaft sensor fault is suspected. Unburnt fuel injected during failed start attempts can wash down cylinder walls, dilute engine oil, and cause permanent damage to the catalytic converters installed on the L7X dual-bank exhaust manifold.
Interrogate the vehicle onboard diagnostic system using a standardized OBD-II scan tool or Renault CLIP diagnostic interface. The primary standard trouble codes associated with crankshaft position sensor system failures on the Avantime include:
- P0335 (Renault Code DF027): Crankshaft Position Sensor Circuit Malfunction – No signal detected by the ECU during engine rotation.
- P0336 (Renault Code DF008): Crankshaft Position Sensor Range/Performance – Erroneous missing pulses detected relative to the camshaft position sensor signal.
- P0339: Crankshaft Position Sensor Circuit Intermittent – Signal dropouts exceeding threshold count over a defined operating cycle.
Testing the Renault Aventime Crankshaft Positon Sensor Location Diagram Signals with ECU Diagnostics
Executing systematic electrical diagnostics ensures you do not replace a functional sensor when the root cause is corroded wiring or a damaged target ring. Follow this diagnostic progression using a digital multimeter (DMM) and an oscilloscope.
Minimum AC peak voltage output during cranking: 1.5 VAC Peak-to-Peak at 250 RPM. Static coil resistance specification: 240 Ω ± 40 Ω at 20°C. Target ring clearance (air gap): 0.7 mm – 1.0 mm.
Begin by checking physical access and wiring condition at the transmission bellhousing location shown in the diagram. Disconnect the 2-pin harness connector (black or brown connector body depending on harness revision) and inspect the terminal pins for green copper corrosion or fluid entry from leaking coolant lines above.
- Static Resistance Measurement: Set your digital multimeter to the 2000 Ohm (Ω) range. Place probe leads across pins 1 and 2 of the sensor terminal side (not the harness side). A healthy OEM inductive sensor on the L7X or F4Rt engine should measure between 200 Ω and 290 Ω. If the reading shows infinite resistance (open circuit) or less than 50 Ω (internal short), the sensor coil is damaged and requires replacement.
- Dynamic AC Voltage Signal Verification: Switch the DMM to measure AC Volts (mV range). Reconnect or back-probe the sensor wiring while cranking the engine with a fully charged battery. The sensor must
- Harness Continuity to Engine ECU: Disconnect the battery negative terminal. Disconnect the main connector from the Siemens Sirius 34 or S2000 ECU (located in the electronic module box behind the battery). Measure resistance between pin 1 of the sensor harness connector and ECU pin 54 (or reference pin specified for your engine code). Resistance must read less than 0.5 Ω. Repeat for sensor pin 2 to ECU pin 55. Insulate against ground shorts by measuring resistance between each signal pin and chassis ground (must read open circuit / infinite resistance).
- Waveform Analysis via Oscilloscope: Connect an automotive oscilloscope channel to sensor signal positive and clip the ground lead to the transmission casing. Crank or idle the engine. Observe the sine wave signal output. Look for uniform peak-to-peak amplitude across all teeth, interrupted cleanly by a single doubled-width peak corresponding to the 2-missing-teeth gap on the target wheel (TDC mark). A truncated waveform indicates a bent target tooth or metallic debris buildup on the magnetic pickup tip.
Renault Aventime Crankshaft Positon Sensor Location Diagram Technical FAQ
What torque spec is required for the crankshaft position sensor mounting bolt?
The single M6 mounting bolt securing the sensor to the transmission bellhousing requires a precise torque spec of 8.0 Nm to 8.5 Nm (71 to 75 in-lbs). Over-tightening this bolt can crack the plastic mounting tab or distort the aluminum mounting flange, altering the critical air gap clearance between the magnetic pickup tip and the flywheel teeth. Always apply a drop of medium-strength threadlocker (Loctite 242) to the threads to prevent loosening caused by normal V6 engine harmonics.
How does a failing sensor impact oil pressure and coolant flow readings?
While the crankshaft position sensor operates on an independent low-voltage electrical circuit, physical failures are frequently caused by external fluid leaks. Coolant leaks originating from the thermostat housing directly above the sensor can run down the bellhousing face, degrading the rubber wire seal and corroding the electrical connector terminals. Furthermore, severe engine oil seepage from the rear main seal or oil filter housing can coat the sensor tip with metallic sludge, dampening the magnetic flux strength and corrupting the waveform sent to the ECU.
Can a damaged timing chain or flywheel ring trigger CKP sensor OBD-II fault codes?
Yes. On engines utilizing dual variable valve timing or high-mileage driveplates, excessive mechanical play, a slack timing chain (on diesel variants), or chipped flywheel ring gear teeth will disrupt signal regularity. If the ECU detects an unexpected phase delay between the crankshaft signal and the camshaft position sensor signal, it will log code P0336 or correlation codes, even if the electrical resistance of the crankshaft sensor itself tests perfectly within OEM limits.
Where does the sensor signal wire route to the Engine Control Unit (ECU)?
The two-conductor shielded harness exits the crankshaft sensor body near the transmission bellhousing, routes upward alongside the main engine engine harness loom beneath the throttle body assembly, and crosses the upper transmission mount. It terminates at the multi-pin ECU connector located inside the protective engine bay junction box positioned adjacent to the left-front suspension tower. The harness utilizes wrapped copper shielding grounded at the ECU ground terminal to prevent ignition coil high-voltage interference from corrupting the delicate AC sine wave signal.
Step-by-Step Guide to Understanding the Renault Aventime Crankshaft Positon Sensor Location Diagram
Identify – Consult the diagram to identify the CKP sensor’s position near the flywheel bellhousing.
Locate – Disconnect the battery and locate the sensor beneath the air intake ducting on the transmission case.
Reference – Reference the 2-pin connector pinout in the diagram to perform a multimeter resistance test (target 200-300 ohms).
Connect/Route – Route the new sensor wiring along original harness clips and lock the harness plug securely to the ECU lead.
Verify – Torque the sensor mounting bolt to 8-10 Nm and recheck connections before starting the engine.
Troubleshoot – Connect an OBD-II scanner to clear diagnostic code P0335 and verify the check engine light remains off.
