Knock Sensor: Testing and Inspection
KNOCK SENSOR (KS) INSPECTIONResistance Inspection
NOTE: Before performing the following inspection, make sure to follow the troubleshooting flowchart. (See FOREWORD.) Flow of Diagnosis
1. Disconnect the KS connector.
2. Measure the resistance between KS terminals A and B.
- If not within the specification, replace the KS.
- If the monitor item condition/specification (reference) is not within the specification, even though the KS resistance is within the specification, perform the "Circuit Open/Short Inspection".
KS resistance: 120 - 280 kOhms
Circuit Open/Short Inspection
1. Disconnect the PCM connector.
2. Disconnect the KS connector.
3. Inspect the following wiring harnesses for open or short. (Continuity inspection)
Open circuit
- If there is no continuity in the following wiring harnesses, there is an open circuit. Repair or replace the wiring harness.
- KS terminal A and PCM terminal 1T
- KS terminal B and PCM terminal 1F
Short circuit
- If there is continuity in the following wiring harnesses, there is a short circuit. Repair or replace the wiring harness.
- KS terminal A and body ground
- KS terminal A and power supply
- KS terminal B and body ground
- KS terminal B and power supply