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Malfunction Indicator Light (MIL) Never Comes On, Even For 2 Seconds, After Ignition Is Turned On (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:
    • Loose No. 25 METER (7.5-amp) fuse located in underdash fuse/relay box.
    • Poor connection at PCM 32-pin connector "A" terminal No. 18. See Figure.
    • Intermittent open 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. Turn ignition on. If low oil pressure light is on, go to next step. If lower oil pressure light is not on, replace No. 25 METER (7.5-amp) fuse. Check for short or open in Yellow wire between No. 25 METER (7.5-amp) fuse and gauge assembly. See appropriate wiring diagram in WIRING DIAGRAMS article.
  3. Try to start engine. If engine starts, go to next step. If engine does not start, turn ignition on. Using backprobe set, measure voltage between ground and PCM 32-pin connector "A" terminal No 10 (Black wire) and terminal No. 23 (Black wire), individually. See Figure. If one volt or more exists, check for open in suspect Black wire between PCM and ground connection, located at thermostat housing. If less than one volt exists, substitute a known-good PCM and recheck. If symptom or indication goes away, replace original PCM.
  4. Turn ignition off. Using backprobe set, connect a fused jumper wire between ground and PCM 32-pin connector "A" terminal No. 18 (Green/Orange wire). See Figure. Turn ignition on. If MIL comes on, substitute a known-good PCM and recheck. If symptom or indication goes away, replace original PCM. If MIL does not come on, replace MIL bulb and/or check for open in Green/Orange wire between PCM 32-pin connector "A" and gauge assembly. See appropriate wiring diagram in WIRING DIAGRAMS article.
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