LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Acura >> 1991 >> Legend Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Code 15: Ignition Output Signal
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Code 15: Ignition Output Signal

NOTE: For wiring diagrams, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section. For vacuum diagrams, see VACUUM DIAGRAMS article in the ENGINE PERFORMANCE Section.
  1. Turn ignition off. Remove ACG fuse in underdash fuse box for 10 seconds to reset ECU. Start engine, and connect jumper wire to diagnostic connector. Observe CHECK ENGINE light. If light is not flashing, problem is intermittent. Check for poor and loose connections at ignitor, ECU and wires in connectors C380 and C382 under right side of dash. Test drive, and check again.
  2. If CHECK ENGINE light flashes Code 15, turn ignition off. Disconnect 8-pin connector on ignitor unit. Check continuity between Black wire terminals and ground.
  3. If continuity is present, go to next step. If no continuity is present, repair open in Black wire(s) between ignitor unit and ground.
  4. Disconnect 6-pin connector from ignitor. Connect ECU test harness between ECU and ECU connector. See Figure . Check for continuity between body ground terminals A21, A22, B3, B4, B6 and B8. If no continuity is present between any of these terminals and ground, go to next step. Repair short in wire if any wire has continuity to ground.
  5. Check each wire between ECU and 6-pin connector at ignitor. Repair any open wires. If all wires are okay, replace ignitor. Retest system for Code 15. If no code is flashed, replace ignitor.
  6. If Code 15 is still present, substitute a known good ECU, and recheck. If condition goes away, replace ECU.
scientia non olet · About LEMON Manuals