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DTC P0325 - KNOCK SENSOR (KS) CIRCUIT MALFUNCTION Isuzu Oasis I

Testing & Diagnostics ~242 words
  1. Perform PCM reset procedure. See «TESTS W/CODES - INTRODUCTION»(ref-16345) article. Start engine and run at 3000 RPM with no loads and transmission in Park or Neutral until radiator fan comes on. Allow engine to idle. Increase and hold engine speed at 3000-4000 RPM for at least 60 seconds. If DTC P0325 is indicated, go to next step. If DTC P0325 is not indicated, problem is intermittent. System is okay at this time (test drive may be necessary). Check for poor connections or loose wires between KS and PCM connectors. See WIRING DIAGRAMS article. Repair as necessary.
  2. Turn ignition off. Disconnect KS single-pin connector, located at lower rear of engine, next to oil filter. Using backprobe kit, check for continuity between ground and PCM 31-pin connector "C" terminal C3 (Red/Blue wire). (Схема №3) If continuity does not exist, go to next step. If continuity exists, repair short in Red/Blue wire between PCM and KS. See WIRING DIAGRAMS article.
  3. Using backprobe kit, check for continuity between PCM 31-pin connector "C" terminal C3 (Red/Blue wire) and KS connector terminal (Red/Blue wire). If continuity does not exist, repair open in Red/Blue wire between PCM and KS. See WIRING DIAGRAMS article. If continuity exists, substitute a known-good KS and recheck. If DTC P0325 is not indicated, replace original KS. If DTC P0325 is indicated, substitute a known-good PCM and recheck. If symptom or indication goes away, replace original PCM.

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