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Malfunction Indicator Light (MIL) Stays On Or Comes On After 2 Seconds (Except D16Y5 M/T)

WARNING: This page is about a different car, the 2000 Honda Civic. However, it is still accessible from the selected car via links, so may be relevant.
  1. If symptom is intermittent, check for:
    • Intermittent short in Brown wire between PCM 32-pin connector "A" terminal No. 10 and service check connector. See Figure. See appropriate wiring diagram in WIRING DIAGRAMS article.
    • Intermittent short in Green/Orange wire between PCM 32-pin connector "A" terminal No. 18 and gauge assembly. See Figure. See appropriate wiring diagram in WIRING DIAGRAMS article.

    Perform repairs as necessary and recheck MIL operation. If no problems are found, go to next step.

  2. Connect scan tool to DLC connector. Turn ignition on. Read Diagnostic Trouble Codes (DTCs). See RETRIEVING DIAGNOSTIC TROUBLE CODES in SELF-DIAGNOSTICS - INTRODUCTION article. If DTCs are present, go to DIAGNOSTIC TROUBLE CODE IDENTIFICATION  table. After identifying DTC, go to appropriate DTC test. If DTCs are not present, go to next step.
  3. Turn ignition off. Connect SCS service connector to service check connector. See SELF-DIAGNOSTICS - INTRODUCTION article. Turn ignition on. Using MIL read DTCs. If DTCs are not present using MIL, go to next step. If DTCs are present using MIL, check for open or short in Blue/Yellow wire between PCM 32-pin connector "A" terminal No. 21 and DLC terminal No. 15. See Figure and Figure . If wire is okay, recheck for DTCs. Go to DIAGNOSTIC TROUBLE CODE IDENTIFICATION  table. After identifying DTC, go to appropriate DTC test.
  4. Attempt to start engine. If engine starts, go to next step. If engine does not start, substitute a known-good PCM and recheck. If symptom or indication goes away, replace original PCM.
  5. Turn ignition off. Turn ignition on. Using backprobe set, measure voltage between ground and PCM 32-pin connector "A" terminal No. 10 (Brown wire). If battery voltage exists, go to next step. If battery voltage does not exist, check for short to ground in Brown wire between PCM 32-pin connector "A" and service check connector. See appropriate wiring diagram in WIRING DIAGRAMS article.
  6. Turn ignition off. Disconnect PCM 32-pin connector "A". Turn ignition on. If MIL is on, check for short to ground in Green/Orange wire between PCM 32-pin connector "A" terminal No. 18 and MIL. See Figure. See appropriate wiring diagram in WIRING DIAGRAMS article. If MIL is not on, substitute a known-good PCM and recheck. If symptom or indication goes away, replace original PCM.
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