Electronically Erasable Programmable Read Only Memory (EEPROM) Programming (7.4L)

2001 Mercury Villager BaseSECTION Electronically Erasable Programmable Read Only Memory (EEPROM) Programming (7.4L)
  1. If VCM was replaced, EEPROM in VCM must be programmed. If EEPROM is not programmed, a DTC will set.
  2. Ensure battery is fully charged. Ensure cable is properly connected on Data Link Connector (DLC). Turn ignition switch to ON position. Perform EEPROM programming using Techline® equipment manufacturer's instructions and latest software applicable for vehicle model.
  3. CKP sensor variation learn procedure should ONLY be performed on except Calif. models. DO NOT perform CKP sensor variation learn procedure on Calif. models. Verify vehicle application by using underhood emission control label. On Calif. models, go to next step. On except Calif. models, if EEPROM programming fails, ensure all harness connections on VCM are okay. Check Techline® for latest software. If EEPROM programming still fails, replace VCM. Once EEPROM is reprogrammed, use scan tool to reset Idle Air Control (IAC) valve and then go to step  5.
  4. Once EEPROM is reprogrammed, password learn procedure for anti-theft system must be performed using proper procedure. Once password learn procedure for anti-theft system has been performed, perform powertrain On-Board Diagnostic (OBD) system check. See POWERTRAIN ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK in appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
  5. Once EEPROM is reprogrammed, CKP sensor variation learn procedure and password learn procedure for anti-theft system must be performed using proper procedure. Once CKP sensor variation learn procedure and password learn procedure for anti-theft system are performed, perform powertrain On-Board Diagnostic (OBD) system check. See POWERTRAIN ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK in appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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  • Brakes feel soft, pull hard to one side, or make grinding noises.
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