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Home/Isuzu/Oasis/Isuzu Oasis I (1995-1999)/Repair manual/Testing & Diagnostics/DTC P1498 - EGR VALVE LIFT SENSOR HIGH VOLTAGE
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DTC P1498 - EGR VALVE LIFT SENSOR HIGH VOLTAGE Isuzu Oasis I

Testing & Diagnostics ~188 words
  1. Perform PCM reset procedure. See «TESTS W/CODES - INTRODUCTION»(ref-16345) article. Start engine and allow it to idle. If DTC P1498 is indicated, go to next step. If DTC P1498 is not indicated, problem is intermittent. System is okay at this time. Check for poor connections or loose wires between EGR valve lift sensor harness connector and PCM connector. See WIRING DIAGRAMS article.
  2. Turn ignition off. Disconnect EGR valve lift sensor 6-pin connector. Turn ignition on. Measure voltage between EGR valve lift sensor harness 6-pin connector terminals No. 2 (Green/Black wire) and No. 3 (Yellow/Blue wire). If about 5.0 volts does not exist, go to next step. If about 5.0 volts exists, replace EGR valve.
  3. Using backprobe kit, measure voltage between PCM 31-pin connector "C" terminal C18 (Green/Black wire) and terminal C28 (Yellow/Blue wire). (Схема №3) If about 5.0 volts exists, repair open in Green/Black wire between PCM connector and EGR valve lift sensor. See WIRING DIAGRAMS article. If about 5.0 volts does not exist, substitute a known-good PCM and recheck. If symptom or indication goes away, replace original PCM.

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