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Diagnosis & Repair

WARNING: This page is about a different car, the 2002 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
  1. Connect Toyota hand-held tester or scan tool to Data Link Connector (DLC) No. 3 at driver's side of instrument panel. See Figure. Disconnect EC1 electrical connector. See Fig 2. EC1 electrical connector is an in-line Black electrical connector located near rear of intake manifold.
  2. Note wire terminal identification in male side of EC1 electrical connector. See Fig 3. Remove wires from terminals No. 2 (Black wire) and 3 (White wire) in male side of EC1 electrical connector. Reverse wire location for terminals No. 2 and 3 and reinstall wires in male side of EC1 electrical connector. Reconnect EC1 electrical connector.
  3. Turn ignition on and then turn hand-held tester or scan tool on. Using Toyota hand-held tester or scan tool, clear DTCs from ECM. Start engine and warm engine to normal operating temperature. Suddenly accelerate engine to 4000 RPM 3 consecutive times. Recheck for DTCs. If DTC P0325 still exists and DTC did not change from original DTC of P0325, go to next step. If DTC changes from original DTC of P0325 to P0330, go to step  5.
  4. Check for open and short in wiring harness and electrical connectors between EC1 electrical connector and ECM for knock sensor No. 1. See WIRING DIAGRAMS article. ECM is located behind glove box. See Figure. If wiring harness or electrical connector is defective, repair as necessary. If wiring harness and electrical connectors are okay, replace ECM.
  5. Check for open and short in wiring harness and electrical connectors between EC1 electrical connector and knock sensor No. 1. See WIRING DIAGRAMS article. Knock sensor No. 1 is located below intake manifold on cylinder block. See Fig 4. If wiring harness or electrical connector is defective, repair as necessary. If wiring harness and electrical connectors are okay, replace knock sensor No. 1. See KNOCK SENSOR under ENGINE SENSORS & SWITCHES in REMOVAL, OVERHAUL & INSTALLATION - V6 & V8 article.
    Fig 1: Identifying Knock Sensor Waveform Patterns
    G00025352Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Locating EC1 Electrical Connector
    G00094849Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 3: Identifying EC1 Electrical Connector Terminals
    G98G12316Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Locating Knock Sensors
    G98G11466Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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