2. A fault in the crankshaft speed sensor circuit is indicated by 1 flash of the red indicator and 1 green indicator (indicators are located on the processor unit).
3. Disconnect the connector from the sensor (photo) and turn on the ignition.
5.3a Crankshaft speed sensor connector on the K24 engine
1. Connector
5.3b Crankshaft speed sensor connector on V6 engine
1. Connector
4. Check for voltage between terminal A and ground (photo).
5.4 Checking for voltage on the sensor
5. Turn off the ignition and use an ohmmeter to check the circuit between terminal D and ground (photo).
5.5 Checking the sensor circuit for ground
The full article is available on the resource (nissanbook.ru)
6. If voltage is present and the ground circuit is OK, then contact a car service center to check the processor unit and wiring.