P0325

Component Description
The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. A knocking vibration from the cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the ECM.
Freeze frame data will not be stored in the ECM for the knock sensor. The MIL will not light for knock sensor malfunction. The knock sensor has one trip detection logic.




ECM Terminals and Reference Value
Specification data are reference values and are measured between each terminal and 48 (ECM ground).

ON BOARD DIAGNOSIS LOGIC:

DTC CONFIRMATION PROCEDURE

NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch "OFF" and wait at least 5 seconds before conducting the next test.

TESTING CONDITION: Before performing the following procedure, confirm that battery voltage is more than 1OV at idle.

With CONSULT-II
1. Turn ignition switch "ON" and select "DATA MONITOR" mode with CONSULT-II.




2. Start engine and run it for at least 5 seconds at idle speed.
3. If DTC is detected, go to "Diagnostic Procedure".

With Generic Scan Tool
Follow the procedure "With CONSULT-II" above.

EC-KS-01:

EC-KS-01 - Connector Views:

WIRING DIAGRAM

Step 1:

Step 2:

Step 3:

Step 4:

Step 5:

Step 6:

DIAGNOSTIC PROCEDURE




Component Inspection
- Use an ohmmeter which can measure more than 10 mOhms.

1. Disconnect knock sensor harness connector.
2. Check resistance between terminal 1 and ground.
Resistance: 500 - 620 kOhms [at 20 °C (68 °F)]

CAUTION: Discard any knock sensors that have been dropped or physically damaged. Use only new ones.