Mazda 2002 6 - Camshaft Position (Cmp) Sensor Inspection

CONTROL SYSTEM
F–55
F
(2) Remove the cylinder block lower blind plug
and install the SST.
(3) Turn the crankshaft pulley to the clockwise
until it stops.
2. Install the CKP sensor to the CKP sensor
installer.
3. Fit the forked part of the CKP sensor installer with
the ninth tooth (counting counterclockwise from
the empty space) of the pulse wheel.
4. Install the CKP sensor fitting bolts.
Tightening torque
5.5—7.5 N·m {56—76 kgf·cm, 4.1—5.5 ft·lbf}
5. Remove the CKP sensor installer
6. Remove the SST then install the cylinder block lower blind plug.
Tightening torque
20 N·m {2.0 kgf·m, 15 ft·lbf}
7. Install the front driveshaft (RH). (See M–17 DRIVE SHAFT REMOVAL/INSTALLATION.)
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CAMSHAFT POSITION (CMP) SENSOR INSPECTION
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Caution
• When foreign material such as an iron chip is on the CMP sensor, it can cause abnormal output
from the sensor because of flux turbulence and adversely affect the engine control. Be sure there
is no foreign material on the CMP sensor when replacing.
Note
• Perform the following inspection only when directed.
Resistance Inspection
1. Disconnect the CMP sensor connector.
2. Measure the resistance between CMP sensor terminals A and B using an ohmmeter.
• If not as specified, replace the CMP sensor.
• If CMP sensor resistance is okay, perform the “Circuit Open/Short Inspection”.
Specification
400—550 ohms
Circuit Open/Short Inspection
1. Disconnect the PCM connector. (See F–43 PCM
REMOVAL/INSTALLATION.)
2. Inspect the following wiring harnesses for open or
short. (Continuity check)
Open circuit
• If there is no continuity, the circuit is open. Repair
or replace the harness.
— CMP sensor terminal A (harness-side) and
PCM terminal 2M (harness-side)
— CMP sensor terminal B (harness-siede) and
PCM terminal 2J (harness-side)
Short circuit
• If there is continuity, the circuit is shorted. Repair
or replace the harness.
— CMP sensor terminal A (harness-side) and power supply
— CMP sensor terminal A (harness-side) and body GND
— CMP sensor terminal B (harness-side) and power supply
— CMP sensor terminal B (harness-side) and body GND
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