DTC Troubleshooting: P0325 (23)

DTC P0325:  Knock Sensor Circuit Malfunction

1.Turn the ignition switch ON (II).

2.Clear the DTC with the HDS.

3.Start the engine. Hold the engine speed at 3,000 rpm (min-1) without load (in Park or neutral) until the radiator fan comes on, then let it idle.

4.Hold the engine at 3,000-4,000 rpm (min-1) at least 10 seconds.

5.Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.

Is DTC P0325 indicated?


YES - Go to 6.


NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the knock sensor and the ECM/PCM.n


6.Turn the ignition switch OFF.

7.Jump the SCS line with the HDS.

8.Disconnect the knock sensor 1P connector.

9.Disconnect ECM/PCM connector A (31P).

10.Check for continuity between ECM/PCM connector terminal A1 and body ground.

 

Is there continuity?


YES - Repair short in the wire between the ECM/PCM (A1) and the knock sensor, then go to 14.


NO - Go to 11.


11.Connect the knock sensor 1P connector terminal No. 1 to body ground with a jumper wire.

 

12.Check for continuity between ECM/PCM connector terminal A1 and body ground.

 

Is there continuity?


YES - Go to 13.


NO - Repair open in the wire between the ECM/PCM (A1) and the knock sensor, then go to 14.

13.Replace the knock sensor.

14.Reconnect all connectors.

15.Turn the ignition switch ON (II).

16.Reset the ECM/PCM with the HDS.

17.Do the ECM/PCM idle learn procedure.

18.Hold the engine at 3,000-4,000 rpm (min-1) at least 10 seconds.

19.Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?


YES - Go to 21.


NO - Go to 20.


20.Monitor the OBD STATUS for DTC P0325 in the DTCs MENU with the HDS.

Does the screen indicate PASSED?


YES - Troubleshooting is complete.n


NO - If the screen indicates FAILED, go to 1 and recheck. If the screen indicates NOT COMPLETED, go to 17 and recheck.

21.Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM.

22.Hold the engine at 3,000-4,000 rpm (min-1) at least 10 seconds.

23.Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?


YES - If DTC P0325 is indicated, check for poor connections or loose terminals at the knock sensor and the ECM/PCM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.n


NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM.n