Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSHONDA1991ACCORD DX, 2D COUPE, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODESDIAGNOSTIC CODESCODE 15 - IGNITION OUTPUT SIGNAL
1991 Honda Accord DX, 2D Coupe, Standard
Code 15 - Ignition Output Signal
1991 Honda Accord DX, 2D Coupe, StandardSECTION Code 15 - Ignition Output Signal
NOTE:
If engine will not start, continue cranking for 20 seconds to reproduce trouble code.
- Turn ignition off. Remove appropriate fuse for 10 seconds to reset ECU. See CLEARING CODES . Start engine. Verify if CHECK ENGINE light is flashing Code 15. If Code 15 is present, go to next step. If Code 15 is not present, problem is intermittent. Check connector at distributor and related circuits.
- Turn ignition off. Disconnect 2-wire connector at distributor. Turn ignition on. Measure voltage between ground and Black/Yellow wire terminal on wire harness side. If battery voltage is not present, repair open Black/Yellow wire between connector and ignition switch.
- If battery voltage is present, turn ignition off. Reconnect 2-wire or 6-wire connector. Connect ECU Test Harness between ECU and ECU connector. See Figure
. Turn ignition on. Individually measure voltage between negative terminal A26 and positive terminals A21 and A22. See Figure
.NOTE: If wire between ignitor and ECU is shorted, ignitor may be damaged.
- If approximately 10 volts is present, substitute a known good ECU, and retest. If condition is corrected, replace original ECU. If specified voltage is not present, check for short or open in Yellow/Green wire between distributor and ECU terminals A21 and A22. If wires are okay, replace ignitor unit.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.