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Home >> Honda >> 1988 >> Civic CRX DX, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Electronic Control System >> Testing >> Code 16: Fuel Injector Circuit (Civic Standard) >> Engine Starts And Runs
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Engine Starts And Runs

  1. Remove hazard fuse in main fuse box for 10 seconds to reset ECU. Start engine and hold engine speed at 2000 RPM for one minute. Verify if "CHECK ENGINE" light is on and if trouble code(s) is present. If not, problem is intermittent. Drive vehicle and retest.
  2. If "CHECK ENGINE" light is on and trouble code 16 is present, turn ignition off. Disconnect 2-wire connector from main injector. Measure resistance between injector terminals. If resistance is not within 0.6-1.6 ohms, replace injector. If resistance is as specified, connect voltmeter positive lead to main injector's Yellow/Black wire and voltmeter negative lead to ground.
  3. Turn ignition on. If battery voltage is not present for 2 seconds, repair open in Yellow/Black wire between main injector and main relay. If battery voltage is present for 2 seconds, turn ignition off. Disconnect 2-wire connector from auxiliary injector.
  4. Measure resistance between auxiliary injector terminals. If resistance is not 6-10 ohms, replace auxiliary injector. If resistance is as specified, connect voltmeter positive lead to Yellow/Black wire of auxiliary injector and voltmeter negative lead to ground.
  5. Turn ignition on. Battery voltage should be present for 2 seconds. If not, repair open Yellow/Black wire between auxiliary injector and main relay. If battery voltage is present for 2 seconds, go to step 6).
  6. Connect voltmeter positive lead to Yellow wire of auxiliary injector connector and negative voltmeter lead to ground. Reading should be approximately 10 volts. If okay, go to step 7). If not, repair open in Yellow wire between auxiliary injector and ECU terminal A3. If wire is okay, substitute a known good ECU and retest. If specified voltage is now present, replace original ECU.
  7. Measure voltage between main injector Red wire and ground. If approximately 10 volts is present, substitute a known good ECU and retest. If specified voltage is now present, replace original ECU.
  8. If from step 7), voltage is not as specified, repair open in Red wire between main injector and ECU terminals A5 and A7. If wire is okay, substitute a known good ECU and retest. If specified voltage is now present, replace original ECU.
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