Resistance Inspection - Mazda CX-7 2007 Workshop Manual

Open circuit
• If there is no continuity, the circuit is open. Repair or replace the wiring harness.
— CMP sensor terminal A and main relay terminal E
— CMP sensor terminal B and PCM terminal 2P
— CMP sensor terminal C and PCM terminal 2S
Short circuit
• If there is continuity, the circuit is shorted. Repair or replace the wiring harness.
— CMP sensor terminal A and body ground
— CMP sensor terminal B and power supply
— CMP sensor terminal C and body ground
— CMP sensor terminal C and power supply
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KNOCK SENSOR (KS) REMOVAL/INSTALLATION[L3 WITH TC]
WM: KNOCK SENSOR
Caution
• Be careful not to impact the sensor.
• Verify that there is no debris between the sensor and the cylinder block before installing.
1. Disconnect the negative battery cable.
2. Remove the intake manifold. (See01-13-5 INTAKE AIR SYSTEM REMOVAL/INSTALLATION[L3 WITH TC])
3. Remove the KS attachment bolt to remove the
KS.
4. Install in the reverse order of removal.
Tightening torque
16— 24 N·m {1.7— 2.4 kgf·m, 12— 17 ft·lbf}
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KNOCK SENSOR (KS) INSPECTION[L3 WITH TC]
Note
• Before performing the following inspection, make sure to follow the procedure as indicated in the
troubleshooting flowchart. (See 00-00-3 HOW TO USE THIS MANUAL.)

Resistance Inspection

1. Turn the ignition switch to the LOCK position.
2. Disconnect the KS connector.
3. Measure the resistance between KS terminals A and B using a tester.
• If not as specified, replace the KS. (See01-40-47 KNOCK SENSOR (KS) REMOVAL/INSTALLATION[L3
WITH TC].)
• If the KS is normal, but the PID value is out of specification, perform the "Circuit Open/Short Inspection".
Specification
Approx. 4.87 megohms
CONTROL SYSTEM [L3 WITH TC]
id014039802900
KS
A
VIEW A
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id014039802800
01-40–47
01-40