Knock Sensor: Testing and Inspection

KNOCK SENSOR (KS) INSPECTION [13B-MSP]

Resistance Inspection

NOTE:
- Before performing the following inspection, make sure to follow the troubleshooting flowchart. Foreword

1. Remove the battery cover. Removal and Replacement

2. Disconnect the negative battery cable.

3. Disconnect the KS connector.

4. Measure the resistance between KS terminals A and B.

- If not within the specification, replace the KS. Service and Repair
- 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 No.1, No.2 resistance
- 120-280 kilohms

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 No.1 terminal A and PCM terminal 2U
- KS No.1 terminal B and PCM terminal 2V
- KS No.2 terminal A and PCM terminal 2AC
- KS No.2 terminal B and PCM terminal 2Y

Short circuit

- If there is continuity in the following wiring harnesses, there is a short circuit. Repair or replace the wiring harness.

- KS No.1 terminal A and body ground
- KS No.1 terminal A and power supply
- KS No.1 terminal B and body ground
- KS No.1 terminal B and power supply
- KS No.2 terminal A and body ground
- KS No.2 terminal A and power supply
- KS No.2 terminal B and body ground
- KS No.2 terminal B and power supply