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Home/Honda/Crosstour/Honda Crosstour I (2012-2012)/Repair manual/Testing & Diagnostics/DTC P0325: Knock Sensor Circuit Malfunction
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DTC P0325: Knock Sensor Circuit Malfunction Honda Crosstour I

Testing & Diagnostics 4 illustrations ~792 words

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION (+).

Scheme 383

Scheme 383: DTC P0325: Knock Sensor Circuit Malfunction
Scheme 383: DTC P0325: Knock Sensor Circuit Malfunction

Scheme 384

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Scheme 386

Scheme 386
Scheme 386
  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HAS.
  3. Start the engine. Hold the engine speed at 3,000 RPM without load (in P or N) until the radiator fan comes on, then let it idle.
  4. Hold the engine speed at 3,000-4,000 RPM for at least 10 seconds.
  5. Check for Pending or Confirmed DTCs with the HAS. Is DTC P0325 indicated? YES -Go to next step. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the knock sensor and the PCM.
  6. Turn the ignition switch to LOCK (0).
  7. Jump the SCS line with the HAS.
  8. Disconnect the knock sensor subharness 1P connector.
  9. Disconnect PCM connector C (49P).
  10. Check for continuity between PCM connector terminal C47 and body ground. Is there continuity? YES -Repair a short in the wire between the PCM (C47) and the knock sensor subharness, then go to step 20 . NO -Go to next step.
  11. Connect the engine wire harness C103 1P connector terminal to body ground with a jumper wire.
  12. Check for continuity between PCM connector terminal C47 and body ground. Is there continuity? YES -Go to next step. NO -Repair an open in the wire between the PCM (C47) and the engine wire harness (C103 connector), then go to step 20 .
  13. Remove the jumper wire from the engine harness.
  14. Remove the intake manifold (see «REMOVAL»(ref-360066-S08435445072010042600000) (+) and the injector base (see «INJECTOR BASE REMOVAL AND INSTALLATION»(ref-360066-S34137645382010042600000) (+).
  15. Disconnect the knock sensor 1P connector.
  16. Check for continuity between the knock sensor subharness 1P connector terminal and body ground. Is there continuity? YES -Repair a short in the knock sensor subharness, then go to step 19 . NO -Go to next step.
  17. Check for an open in the knock sensor subharness. Is the harness OK? YES -Go to next step. NO -Repair an open in the knock sensor subharness, then go to step 19 .
  18. Replace the knock sensor (see «KNOCK SENSOR REPLACEMENT»(ref-360080-S02385680692010042600000) (+).
  19. Install the injector base (see «INJECTOR BASE REMOVAL AND INSTALLATION»(ref-360066-S34137645382010042600000) (+) and the intake manifold (see «INSTALLATION»(ref-360066-S07298263282010042600000) (+).
  20. Reconnect all connectors.
  21. Turn the ignition switch to ON (II).
  22. Reset the PCM with the HAS.
  23. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-360079-S22847966492010042600000) (+).
  24. Hold the engine speed at 3,000-4,000 RPM for at least 10 seconds.
  25. Check for Pending or Confirmed DTCs with the HAS. Is DTC P0325 indicated? YES -Check for poor connections or loose terminals at the knock sensor and the PCM, then go to step 27 . NO -Go to next step.
  26. Monitor the OBD STATUS for DTC P0325 in the DTCs MENU with the HAS. Does the HAS indicate PASSED? YES -Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 25 , go to the indicated DTC's troubleshooting. NO -If the HAS indicates FAILED, check for poor connections or loose terminals at the knock sensor and the PCM, then go to step 1 . If the HAS indicates NOT COMPLETED, go to step 24 .
  27. Update the PCM if it does not have the latest software (see «PCM UPDATE»(ref-360080-S11980508702010042600000) (+) or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-360056-S32194616542010042600000) (+).
  28. Start the engine. Hold the engine speed at 3,000 RPM without load (in P or N) until the radiator fan comes on, then let it idle.
  29. Hold the engine speed at 3,000 - 4,000 RPM for at least 10 seconds.
  30. Check for Pending or Confirmed DTCs with the HAS. Is DTC P0325 indicated? YES -Check for poor connections or loose terminals at the knock sensor and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-360056-S32194616542010042600000) (+) then go to step 28 . If the PCM was substituted, go to step 1 . NO -Go to next step.
  31. Monitor the OBD STATUS for DTC P0325 in the DTCs MENU with the HAS. Does the HAS Indicate PASSED? YES -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(ref-360080-S27881728262010042600000) (+). If any other Pending or Confirmed DTCs were indicated in step 30 , go to the indicated DTC's troubleshooting. NO -If the HAS indicates FAILED, check for poor connections or loose terminals at the knock sensor and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-360056-S32194616542010042600000) (+) then go to step 28 . If the PCM was substituted, go to step 1 . If the HAS indicates NOT COMPLETED, go to step 28 .

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