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Home >> Toyota >> 2004 >> Matrix Base, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Engine Control System Self-Diagnostics) >> Diagnostic Tests >> DTC P0325: Knock Sensor No. 1 Circuit >> Diagnosis & Repair
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Diagnosis & Repair

WARNING: This page is about a different car, the 2002 Toyota Sequoia. 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 EB2 electrical connector on 4WD models or EB3 electrical connector on 2WD models. See Fig 2. EB2 or EB3 electrical connector is an in-line Gray electrical connector located near the starter.
  2. Note wire terminal identification in male side of EB2 or EB3 electrical connector. See Fig 3. On 2WD models, remove wires from terminals No. 2 (Black wire) and 3 (Gray wire) in male side of EB3 electrical connector. Reverse wire location for terminals No. 2 and 3 and reinstall wires in male side of EB3 electrical connector. Reconnect EB3 electrical connector. On 4WD models, remove wires from terminals No. 1 (Black wire) and 2 (Gray wire) in male side of EB2 electrical connector. Reverse wire location for terminals No. 1 and 2 and reinstall wires in male side of EB2 electrical connector. Reconnect EB2 electrical connector.
  3. On all models, 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 EB2 or EB3 electrical connector and ECM for knock sensor No. 1. See WIRING DIAGRAMS article. ECM is located behind glove box and heater duct. 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 EB2 or EB3 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 EB2 & EB3 Electrical Connectors
    G00025356Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 3: Identifying EB2 & EB3 Electrical Connector Terminals
    G00025360Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Locating Knock Sensors
    G98G11466Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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