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Home >> Acura >> 1988 >> Legend Base, 2D Coupe, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Tests W/Codes >> Self-Diagnostic System >> Code 14 - EACV Sensor
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Code 14 - EACV Sensor

  1. Turn ignition off. Remove alternator sense fuse in under-hood fuse box for 10 seconds to reset ECU.
  2. Start engine and observe "CHECK ENGINE" light or PGM-FI warning light. If light is off, problem is intermittent. Test drive and check again. If light is on, turn ignition off. Disconnect 2-wire connector at EACV. Measure resistance between EACV terminals.
  3. If resistance is not 8-15 ohms, replace EACV. If resistance is as specified, go to next step.
  4. Check continuity to ground between each EACV terminal. If continuity exists, replace EACV. If not, turn ignition on. Measure voltage between Yellow/Black (pos.) and Blue/Red (neg.) wire terminals.
  5. Check battery voltage. If battery voltage is not present, go to step 6). If battery voltage is present, disconnect connector from ECU and again check for battery voltage. If battery voltage is not present, go to step 10. If battery voltage is now present, repair short in Blue/Red wire or Blue/Yellow wire between ECU and EACV.
  6. If no battery voltage existed in step 4, measure voltage between Yellow/Black terminal and body ground. If battery voltage now exists, proceed to step 7. If battery voltage still does not exist, repair open Yellow/Black wire between EACV and main relay
  7. If battery voltage exist, turn ignition off. Reconnect EACV connector. Connect system checker harness "A" to right side wire harness only, not ECU.
  8. Turn ignition on. Using a voltmeter, measure voltage between connector terminals A11 (pos.) and A18 (neg.). If battery voltage does not exist, repair open in wire between ECU terminal A11 and EACV. If battery voltage exists, connect and disconnect terminal A11 to A18. If EACV does not click when connector is connected and disconnected, replace EACV.
  9. If EACV clicks, substitute a known good EACV and recheck for code. If condition is rectified, replace original EACV. If code still persists, go to next step.
  10. Substitute a known good ECU. If condition is rectified, replace original ECU.
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