Crankshaft Angle Sensor

On G20 and M30, crankshaft angle sensor is part of distributor. On Q45, crankshaft angle sensor is a self-contained unit located on left front of engine. If a fault is present in crankshaft angle sensor, Code 11 may set in ECU memory. If Code 11 is set, proceed to TESTS W/CODES article in the ENGINE PERFORMANCE Section.
To test crankshaft angle sensor, remove crankshaft angle sensor (Q45) or distributor (G20 and M30). Leave sensor wiring connected. Using a logic probe or DVOM with an analog bar graph function, touch negative lead to ground and positive lead to one-degree and 90/120/180-degree signal terminals of ECU. See CRANKSHAFT ANGLE SENSOR SIGNAL HARNESS TERMINALS table. See Fig 1 to 6.

Fig 1: Crankshaft Angle Sensor Terminal ID (G20)
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Crankshaft Angle Sensor Terminal ID (M30)
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Crankshaft Angle Sensor Terminal ID (Q45)
Courtesy of NISSAN MOTOR CO., U.S.A.
Rotate sensor by hand. On a DVOM, one-degree signals should measure about 2.3-2.8 peak volts with sensor rotating. 45/60-degree signal should measure about .1-.4 peak volt with sensor rotating. If either signal is not present, replace crank angle sensor. On Q45, also see SUB-CRANK ANGLE SENSOR (Q45).

NOTE: Crankshaft angle sensor voltage may be measured using a conventional DVOM without bar graph function; however, peak voltage signal may not easily be determined due to "averaging" of signal.

CRANKSHAFT ANGLE SENSOR SIGNAL HARNESS TERMINALS

Model	One-Degree Signal Terminal	90/120/180-Degree Signal Terminal
G20	"a"	"d"
M30	3	4
Q45	1	2