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Malfunction Indicator Light (MIL) Never Comes On, Even For 2 Seconds After Ignition Is Turned On

WARNING: This page is about a different car, the 2000 Honda Prelude. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition on. If charge system light is on, go to next step. If charge system light is not on, replace No. 14 ECU/EAT ECU (15-amp) fuse and repair short or open in Black/Yellow wire between No. 14 ECU/EAT ECU (15-amp) fuse and instrument panel. See appropriate wiring diagram in WIRING DIAGRAMS article.
  2. 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 less than one volt exists, substitute a known-good PCM and recheck. See SUBSTITUTING PCM under SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - INTRODUCTION article. If symptom or indication goes away, replace original PCM. If one volt or more exists, repair open in suspect Black wire between PCM and ground connection G101, located at right side of engine, near VTEC pressure switch. See appropriate wiring diagram in WIRING DIAGRAMS article.
  3. Turn ignition off. Using backprobe kit, connect a fused jumper wire between ground and PCM 32-pin connector "A" terminal No. 18 (Gray/Red wire). See Figure . Turn ignition on. If MIL comes on, substitute a known-good PCM and recheck. See SUBSTITUTING PCM under SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - INTRODUCTION article. If symptom or indication goes away, replace original PCM. If MIL does not come on, replace MIL bulb and/or repair open in Gray/Red wire between PCM 32-pin connector "A" terminal No. 18 and instrument panel.
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