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Home >> Toyota >> 2004 >> Matrix Base, FWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Engine Control System Self-Diagnostics - 4-Cylinder) >> Diagnostic Tests >> DTC P0325: Knock Sensor Circuit >> Diagnosis & Repair
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Diagnosis & Repair

WARNING: This page is about a different car, the 2002 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition off. Access ECM behind glove box. See Figure. Disconnect ECM harness connector E9. Measure resistance between ground and terminal No. 27 (White wire) at ECM harness connector E9. See Figure. If resistance is less than one megohm, go to next step. If resistance is one megohm or more, go to step  3.
  2. Disconnect knock sensor harness connector. Check continuity between knock sensor housing and knock sensor terminal (component side). If continuity does not exist, go to next step. If continuity exists, replace knock sensor.
  3. Check for open or short in wiring between knock sensor and ECM. See WIRING DIAGRAMS article. If problem does not exist, go to next step. If problem exists, repair wiring as necessary.
  4. Install known-good knock sensor. Clear DTCs. Test drive vehicle. Retrieve DTCs. If DTC P0325 returns, replace ECM. If DTC P0325 does not return, original knock sensor was defective.
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