[2] Sensor and Relays (1) NE Sensor (Crankshaft Position Sensor) a. When the signal holes on the flywheel move past the sensor, the magnetic line of force passing through the coil changes, generating alternating voltage. b. The signal holes are located on the flywheel at 6.5-degree intervals. There are a total of 56 holes, with holes missing in three places. Therefore, every two revolutions of the engine outputs 112 pulses. c. This signal is used to detect the engine speed and the crankshaft position in 7.5-degree intervals. NE (Crankshaft Position) Sensor Q000263E (2) TDC Sensor (Cylinder Recognition Sensor) a.
Unlike the NE sensor, the TDC sensor is an MRE (magnetic resistance element) sensor. As the pulsar near the sensor revolves, the magnetic field changes. This causes variations in the generated current, which are amplified in the internal circuits of the sensor unit before a signal is output to the engine ECU. b. The engine camshaft gear (one revolution for every two revolutions of the engine) is used as a pulsar. The J05D and J08E use different types of gear, so the signal outputs differ as follows. For the J05D: In addition to four knock pins located at 90-degree intervals, there is an extra signal hole on the gear. Therefore every revolution of the gear, i.e.
two revolutions of the engine, outputs 4 + 1 = 5 TDC signal pulses. For the J08E: In addition to six knock pins located at 60-degree intervals, there is an extra signal hole on the gear. Therefore every revolution of the gear, i.e. two revolutions of the engine, outputs 6 + 1 = 7 TDC signal pulses. TDC (Cylinder Recognition) Sensor Q000264E 23