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Code 14 - Electronic Air Control Valve (EACV)

  1. Turn ignition off. Remove appropriate fuse for 10 seconds to reset ECU. See ECU RESET FUSE CHART  . Start engine. Verify if CHECK ENGINE light is on and if LED is flashing Code 14. If Code 14 is present, go to next step. If Code 14 is not present, problem is intermittent. Check connectors at EACV and related circuits.
  2. Turn ignition off. Disconnect EACV connector. Check resistance between both connector terminals on EACV.
  3. Resistance should be 8-15 ohms. If resistance is not within specification, replace EACV. If resistance is within specification, proceed to next step.
  4. Check for continuity to ground on each EACV connector terminal. If continuity exists, replace EACV. If no continuity exists, turn ignition on. Measure voltage between positive Black/Yellow and negative Blue/Yellow terminals.
  5. Check for battery voltage. If no battery voltage exists, proceed to step 6). If battery voltage exists, disconnect connector from ECU, and again check for battery voltage. If battery voltage still does not exist, substitute a known good ECU. If condition is corrected, replace original ECU. If battery voltage exists, repair short in Blue/Yellow wire between ECU terminal A11 and EACV.
  6. If battery voltage is not present in step 5), measure voltage between ground and Black/Yellow wire terminal. If battery voltage is now present, proceed to step 7). If battery voltage still does not exist, repair open Black/Yellow wire between main relay and EACV.
  7. If battery voltage exists, turn ignition off. Reconnect EACV connector. Connect ECU Test Harness connector "A" to main wire harness side only. Turn ignition on. Measure voltage between connector A11 (+) and A2 (-). If voltage does not exist, repair open in Blue/Yellow wire between ECU terminal A11 and EACV.
  8. If battery voltage exists, connect and disconnect terminal A11 and A2. If EACV does not click when connector is connected and disconnected, replace EACV. If EACV clicks, substitute a known good ECU. If condition is corrected, replace original ECU.
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