Location of speed sensor automatic transmission Nissan Cefiro A32
1. Raise the car on a lift or place it on jacks.
2. Find the car’s transmission.
3. The speed sensor is located on the transmission tail end, next to the output shaft.
4. It is usually secured with one or two bolts.
Automatic transmission speed sensor diagnostics
1. Check electrical connections: Make sure the electrical wires connected to the speed sensor are secure and not damaged.
2. Check the sensor resistance: Disconnect the electrical connector from the speed sensor and check the resistance between the sensor contacts. The resistance must comply with the specifications specified in the repair manual.
3. Check the sensor output: Using an oscilloscope, check whether the speed sensor produces a pulse signal when the shaft rotates. The signal must be clean and have the correct amplitude.
Replacing the automatic transmission speed sensor
1. Disconnect the electrical connector from the speed sensor.
2. Remove the bolts securing the sensor to the transmission.
3. Remove the old speed sensor and install the new one.
4. Tighten the mounting bolts.
5. Connect the electrical connector to the speed sensor.
6. Clear trouble codes using an OBD-II scanner.
7. Check the operation of the speed sensor by driving the car.