1992 Acura Legend Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Code 16: Fuel Injector Circuit

  1. Turn ignition off. Remove fuse No. 15 (ACG) fuse from underdash fuse box for 10 seconds to reset ECU. Check ECU for fault codes. See RETRIEVING CODES  . If Code 16 is not present, problem is intermittent. Check for poor connections at ECU connector and fuel injector connectors. Test drive vehicle and retest.
  2. If Code 16 is present, start engine. Using a stethoscope, check for clicking sound at each injector. If injector(s) does not click, turn ignition off. Disconnect 2-pin injector connector from affected injector. Measure resistance between injector terminals. If resistance is not 1.5-2.5 ohms, replace injector. If resistance is 1.5-2.5 ohms, go to next step.
  3. Turn ignition on. Measure voltage between fuel injector wiring harness connector Red/Black wire and body ground. If battery voltage is present, go to step 6). If battery voltage is not present, turn ignition off.
  4. Disconnect 8-pin connector at injector resistor. Turn ignition on. Measure voltage between Yellow/Black (+) wire terminal and body ground. If battery voltage is not present, repair open in Yellow/Black wire between injector resistor and main relay. If battery voltage is present, disconnect injector resistor connector.
  5. Measure resistance between terminal "E" and all other terminals. See Fig 1 . If resistance is not 5-7 ohms, replace injector resistor. If resistance is 5-7 ohms, repair open in Red/Black wire between 2-pin connector and injector resistor.
  6. If battery voltage was present in step 3), turn ignition off. Reconnect fuel injector connector. Connect ECU Test Harness (07LAJ-PT3010A ) between ECU and ECU connector. See Figure . Turn ignition on. Check voltage at following test terminals.
    • Injector No. 1: A1 (+) And A23 (-)
    • Injector No. 2: A3 (+) And A23 (-)
    • Injector No. 3: A5 (+) And A23 (-)
    • Injector No. 4: A2 (+) And A23 (-)
    • Injector No. 5: A4 (+) And A23 (-)
    • Injector No. 6: A6 (+) And A23 (-)

    If battery voltage is not present, repair open in wire between injector and ECU connector. If battery voltage is present, substitute a known good ECU, and retest. If specified voltage is now present, replace original ECU.

    Fig 1: Injector Resistor Connector Terminal ID
    G92G26225Courtesy of AMERICAN HONDA MOTOR CO., INC.
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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.

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