Turbine speed sensor, automatic transmission Renault Megane II
Purpose:
* Measures the rotation speed of the torque converter turbine.
* Transmits data to the electronic control unit (ECU) of the automatic transmission.
Location:
* On the torque converter turbine housing.
* In the front part of the gearbox, under the body side member.
Working principle:
* The sensor is an inductive coil.
* When the turbine teeth pass the sensor, they create a change in the magnetic field, which induces an electrical signal in the coil.
* The signal frequency is proportional to the turbine rotation speed.
Electrical characteristics:
* Signal type: pulse
* Supply voltage: 12 V
* Resistance: 600-1000 ohms
Possible faults:
* Damage to sensor or wiring
* Contamination of the sensor with metal shavings
* Malfunction of the automatic transmission electronic control unit
Consequences of the malfunction:
* Incorrect automatic transmission operation
* Deterioration of the dynamic characteristics of the car
* Increased fuel consumption
Diagnostics:
* Scanning with a diagnostic scanner for fault codes
* Voltage measurement at the sensor connector
*Checking the sensor resistance
* Visual inspection of the sensor and wiring
Replacement:
* Disconnect the negative terminal of the battery.
* Disconnect the sensor connector.
* Unscrew the mounting bolt.
* Remove the old sensor and install the new one.
* Tighten the mounting bolt.
* Connect the sensor connector.
* Connect the negative terminal of the battery.
* Reset automatic transmission adaptations using a diagnostic scanner.