LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Acura >> 1990 >> Integra LS, 2D Hatchback, 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. For vacuum diagrams, see VACUUM DIAGRAMS article.
  1. Turn ignition off. Remove hazard fuse in main fuse box for 10 seconds to reset ECU. Start engine and observe CHECK ENGINE and LED lights. If lights are off, problem is intermittent. Check for poor or loose connection at distributor connector, round connector C216 at right shock tower. Test drive and check again.
  2. If CHECK ENGINE light is on and LED indicates code 15, turn ignition off. Disconnect 2-pin connector at distributor. Turn ignition on. Measure voltage between ground and Black/Yellow wire terminal on wiring harness side. If battery voltage is not present, repair open Black/Yellow wire between the 2-pin connector and ignition switch.
  3. If battery voltage is present, turn ignition off. Reconnect 2-pin distributor connector. Connect ECU test harness between ECU and ECU connector. Turn ignition on.
  4. Individually, measure voltage between ECU terminals B15 (positive), B17 (positive), and A18 (ground). See Figure . If about 10 volts is not present, repair open or short in White wire between distributor and ECU terminals B15 and B17, or replace ignitor unit. If about 10 volts is present at any of the terminals, substitute a known good ECU and recheck. If condition goes away, replace original ECU.
scientia non olet · About LEMON Manuals