FixVault
Home › Honda › 2003 › CR-V EX, Automatic › Repair and Diagnosis › Engine Performance › System › PGM-FI System › DTC Troubleshooting › DTC P0325: Knock Sensor Circuit Malfunction

DTC P0325: Knock Sensor Circuit Malfunction

  1. Reset the ECM/PCM (see ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING ).
  2. Start the engine. Hold the engine at 3,000 RPM with no load (in Park or neutral) until the radiator fan comes on, then let it idle.
  3. Hold the engine at 3,000-4,000 RPM for at least 60 seconds.

    Is DTC P0325 indicated? 

    1. YES  - Go to step 4.
    2. NO  - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the knock sensor and at the ECM/PCM.
  4. Turn the ignition switch OFF.
  5. Disconnect starter subharness 8P connector (C102).
  6. Check for continuity between ECM/PCM connector terminal A9 and body ground.
    Fig 1: Checking Continuity Between ECM/PCM Connector Terminal A9 & Body Ground
    G01475480Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Repair short in the wire between the ECM/ PCM (A9) and the starter subharness 8P connector.
    2. NO  - Go to step 7.
  7. Connect starter subharness 8P connector terminal No.7 to body ground with a jumper wire.
    Fig 2: Connecting Starter Subharness 8-Pin Connector Terminal No.7 To Body Ground
    G01475481Courtesy of AMERICAN HONDA MOTOR CO., INC.
  8. Check for continuity between body ground and ECM/PCM connector terminal A9.
    Fig 3: Checking Continuity Between Body Ground & ECM/PCM Connector Terminal A9
    G01475482Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - Go to step 9.
    2. NO  - Repair open in the wire between the ECM/ PCM (A9) and the starter subharness 8P connector (C102).
  9. Check the starter subharness between 8P connector and the knock sensor for an open or short. If it's OK, substitute a known-good knock sensor and recheck.

    Is DTC P0325 indicated? 

    1. YES  - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/ PCM, then recheck (see ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING ). If the symptom/ indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.
    2. NO  -Replace the original knock sensor and/or starter subharness (see Knock Sensor Replacement  ).
About FixVault