Crankshaft Position (Ckp) Sensor Inspection - Mazda Mazda6 Workshop Manual Supplement

CRANKSHAFT POSITION (CKP) SENSOR INSPECTION

Note
• Perform the following test only when directed.
Caution
• When foreign material, such as iron chips, gets on the CKP sensor, it can cause abnormal output
from the sensor because of flux turbulence and adversely affect engine control. Be sure there is
no foreign material on the CKP sensor when replacing.
• Do not forcefully pull the wiring harness of the CKP sensor. Doing so will break the harness.
Visual Inspection
1. Verify that the CKP sensor and the pulsar are free of any metallic shavings or particles.
• If any are found on the CKP sensor and the pulsar, clean them off.
Air Gap Inspection
1. Disconnect the negative battery cable.
2. Remove the crankshaft pulley. (See
3. Remove the crankshaft pulley. (See
4. Verify that clearance A between the CKP sensor
and the pulsar is within the specification.
• If not as specified, replace the CKP sensor.
Clearance A
1.5—2.5 mm {0.059—0.098 in}
Resistance Inspection
1. Disconnect the negative battery cable.
2. Disconnect the CKP sensor connector.
3. Measure the resistance between the CKP sensor
terminals under the following condition.
• If not as specified, replace the CKP sensor.
Specification
Atmospheric
Terminal
temperature °C {°F}
A—B 20 {68}
Circuit Open/Short Inspection
1. Inspect for open/short circuit in the following wiring harnesses.
• If there is open/short circuit, repair or replace wiring harnesses.
Open circuit
• CKP sensor terminal A and PCM terminal 29
• CKP sensor terminal B and PCM terminal 3
Short circuit
• CKP sensor terminal A and PCM terminal 29 to GND
• CKP sensor terminal B and PCM terminal 3 to GND
End Of Sie
F2–82
CONTROL SYSTEM
B2–9 TIMING BELT
B2–9 TIMING BELT
Resistance (kilohm)
1.8—2.45
REMOVAL/INSTALLATION.)
REMOVAL/INSTALLATION.)
A
A6E404018230202
CLEARANCE A
A6E40702054
C
B
A6E40702055