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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 98 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0325: Knock Sensor 1 Circuit (Bank 1) Or DTC P0330: Knock Sensor 2 Circuit (Bank 2) >> Diagnosis & Repair

Diagnosis & Repair

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. Connect scan tool to Data Link Connector (DLC) No. 3. See Figure. Disconnect EC1 Black 3-pin connector. EC1 connector is a wire-to-wire connector located at center rear of engine, near starter. Using a fused jumper wire, connect terminal No. 3 (Gray wire) on male part of connector to terminal No. 2 (Black wire) on female part of connector. Connect another jumper wire between terminal No. 2 (Black wire) on male part of connector to terminal No. 3 (White wire) on female part of connector. See Fig 1.
    Fig 1: Checking Knock Sensor Circuits
    G00165132Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Turn ignition on. Turn scan tool on. Allow engine to reach its normal operating temperature. Snap throttle 3 times to 4000 RPM. Retrieve trouble codes. See RETRIEVING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. If same DTC is repeated, go to next step. If DTC changed, go to step  4.
  3. Check for short or open in Black or White wires between EC1 harness connector and ECM. Repair as necessary. If wiring harness is okay, replace ECM.
  4. Check for short or open in Black or Gray wires between EC1 harness connector and knock sensor. Repair as necessary. If wiring harness is okay, replace knock sensor.
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