Mazda 2: Crankshaft Position (CKP) Sensor
CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION
CAUTION:
- When replacing the CKP sensor, make sure there is no foreign material on
it such as
metal shavings. If it is installed with foreign material, the sensor output
signal will
malfunction resulting from fluctuation in magnetic flux and cause a
deterioration in
engine control.
1. Disconnect the negative battery cable.
2. Remove the splash shield.

3. Remove the drive belt. (See DRIVE BELT REMOVAL/INSTALLATION).
4. Disconnect the CKP sensor connector.
5. Remove the CKP sensor.

6. Install in the reverse order of removal.
CRANKSHAFT POSITION (CKP) SENSOR INSPECTION
Visual Inspection
1. Remove the CKP sensor. (See CRANKSHAFT POSITION (CKP) SENSOR
REMOVAL/INSTALLATION).
2. Verify that there are no metal shavings on the sensor.
- If there is a malfunction, replace the CKP sensor. (See CRANKSHAFT
POSITION (CKP) SENSOR REMOVAL/INSTALLATION).
3. Install the CKP sensor. (See CRANKSHAFT POSITION (CKP) SENSOR
REMOVAL/INSTALLATION).
Air Gap Inspection
1. Verify that the CKP sensor is securely installed.
2. Using a thickness gauge, measure the air gap between the plate projections at
the back of
crankshaft pulley and the CKP sensor.

- If not within the specification, inspect the plate projections for
cracks or
bending.
Air gap
- 0.5-1.5 mm {0.02-0.05 in}
Voltage Inspection
CAUTION:
- Water penetrating the connector will cause sensor malfunction. To
prevent this, be
careful not to damage the wiring harnesses or the waterproof connector so as
to cause
water penetration.
1. Idle the engine.
2. Measure the crankshaft position signal and verify that rectangular waves are
produced.
(See PCM INSPECTION).
3. If not as specified, replace the CKP sensor. (See CRANKSHAFT POSITION (CKP)
SENSOR REMOVAL/INSTALLATION).
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CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION
CAUTION:
When replacing the CMP sensor, make sure there is no foreign material on
it such as
metal shavings. If it is installed with foreign ma
KNOCK SENSOR (KS) REMOVAL/INSTALLATION
1. Disconnect the negative battery cable.
2. Remove the intake manifold. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION).
3. Disconnect the KS connector.
4. Remo
FUEL TANK PRESSURE SENSOR REMOVAL/INSTALLATION
CAUTION:
The fuel tank pressure sensor cannot be removed as a single unit. When
replacing the
fuel tank pressure sensor, replace it together with th
SEE MORE:
System Malfunction Location
Detection Condition
WARNING:
Detection conditions are for understanding the DTC outline before
performing an inspection. Performing an
inspection according to only the detection conditions may cause injury due
to an operating error, or damage the
system. When per
OIL CONTROL VALVE (OCV) INSPECTION
Coil Resistance Inspection
1. Disconnect the negative battery cable.
2. Disconnect the OCV connector.
3. Measure the coil resistance between terminals A and B using a tester.
If not within the specification, replace the OCV. (See OIL CONTROL VALVE
(OCV) REMOV
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