4 - 28 S-40 • S-45 Part No. 102521October 2013Section 4 • Repair Procedures5-4Engine Fault Codes -Ford ModelsHow to Retrieve Engine FaultCodesWhen an engine malfunction is detected by theElectronic Control Module (ECM), a fault code isrecorded and the check engine light will turn on atthe ground controls. Special equipment is requiredto retrieve fault codes stored within the ECM.Contact Genie Industries Service Department forassistance in retrieving fault codes.Note: Perform this procedure with the key switch inthe off position.1 Open the ground controls side cover and locatethe run/test toggle switch on the side of theground control box.2 Pull out the red Emergency Stop button to theon position at both the ground and platformcontrols.3 Quickly activate and release the start toggleswitch/button. Do not start the engine.(before serial no. 7597)4 Move and hold the run/test toggle switch to thetest position.Result: The check engine light should turn on.The check engine light should begin to blink.5 Continue to hold the run/test toggle switch in thetest position and count the blinks.Note: If any fault codes are present, the ECM willuse the check engine light to blink a three digitcode.It will blink the first digit of a three digit code,pause, blink the second digit, pause, and then blinkthe third digit. For example: the check engine lightblinks 5 consecutive times, blinks 3 times and then1 time. That would indicate code 531. There will bea longer pause between codes.6 Refer to Section 5,Fault Codes, for definition ofengine fault codes.Note: Once a fault code has been retrieved and therepair has been completed, the ECM memory mustbe reset to clear the fault code from the ECM. SeeHow to Clear Engine Fault Codes from the ECM.How to Clear Engine FaultCodes from the ECMNote: Perform this procedure with the engine offand the key switch in the off position.1 Open the engine side turntable cover and locatethe battery.2 Disconnect the negative battery cable from thebattery for a minimum of 5 minutes.Electrocution/burn hazard. Contactwith electrically charged circuitscould result in death or seriousinjury. Remove all rings, watchesand other jewelry.3 Connect the negative battery cable to thebattery.ENGINESProperty of American Airlines
