CX-7 FWD L4-2.3L Turbo (2010)
Knock Sensor: Testing and Inspection
KNOCK SENSOR (KS) INSPECTION [L3 WITH TC]
NOTE:
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Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart. See: Description and
Operation
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.
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If not as specified, replace the KS. (See See: Service and Repair.)
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If the KS is normal, but the PID value is out of specification, perform the "Circuit Open/Short Inspection".
Specification
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Approx. 4.87 megohms
Circuit Open/Short Inspection
1. Disconnect the PCM connector. (See See: Powertrain Management/Computers and Control Systems/Engine Control Module/Service and
Repair/Removal and Replacement.)
2. Inspect the following wiring harnesses for an open or short circuit. (Continuity check)
Open circuit
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If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
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KS terminal A and PCM terminal 2U
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KS terminal B and PCM terminal 2V
Short circuit
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If there is continuity, there is a short circuit. Repair or replace the wiring harness.
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KS terminal A and power supply
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KS terminal A and body ground
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KS terminal B and power supply
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KS terminal B and body ground