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DTC P0327 KNOCK SENSOR 1 CIRCUIT LOW INPUT (BANK 1 OR SINGLE SENSOR)

DTC P0327 KNOCK SENSOR 1 CIRCUIT LOW INPUT (BANK 1 OR SINGLE SENSOR)

DTC DETECTING CONDITION:


• Immediately at fault recognition

• GENERAL DESCRIPTION


TROUBLE SYMPTOM:


• Poor driving performance

• Knocking occurs.


Important

After repair or replacement of faulty parts, conduct Clear Memory Mode and Inspection Mode .


WIRING DIAGRAM:


CHECK HARNESS BETWEEN KNOCK SENSOR AND ECM CONNECTOR.

Turn the ignition switch to OFF.

Disconnect the connector from ECM.

Measure the resistance between ECM harness connector and chassis ground.

Connector & terminal

(B135) No. 4 — Chassis ground:

Is the resistance more than 700 kΩ?

Yes


No

• Repair the harness and connector.

•
Note

In this case, repair the following:

• Open circuit in harness between knock sensor and ECM connector

• Poor contact in knock sensor connector

• Poor contact in coupling connector



CHECK KNOCK SENSOR.

Disconnect the connector from knock sensor.

Measure the resistance between knock sensor connector terminal and engine ground.

Terminals

No. 2 — Engine ground:

Is the resistance more than 700 kΩ?

Yes


No

• Repair the harness and connector.

•
Note

In this case, repair the following:

• Poor contact in knock sensor connector

• Poor contact in coupling connector



CHECK CONDITION OF KNOCK SENSOR INSTALLATION.

Is the knock sensor installation bolt tightened securely?

Yes

Replace the knock sensor.


No

Tighten the knock sensor installation bolt securely.