KNOCK SENSOR (KS) INSPECTION [LF]

#
KNOCK SENSOR (KS) INSPECTION [LF]

B3E014018921W01

  Note

  • Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart.

## Resistance Inspection

1. Disconnect the knock sensor connector.

2. Measure resistance between KS terminals A and B.

  • If not within the specification, replace the KS.
  • If the monitor item status/specification (reference) is not within the specification, even though the KS resistance is within the specification, perform the "Circuit Open/Short Inspection".

  Resistance
  Approx. 4.87 megohms

## Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION [LF].)

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.
  - Knock sensor terminal A and PCM terminal 2Q
  - Knock sensor terminal B and PCM terminal 2R

### Short circuit

  • If there is continuity, the circuit is shorted. Repair or replace the harness.
  - Knock sensor terminal A and power supply
  - Knock sensor terminal A and body GND
  - Knock sensor terminal B and power supply
  - Knock sensor terminal B and body GND