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

If Vehicle Control Module (VCM) was replaced, the EEPROM in the VCM must be programmed. If EEPROM is not programmed, a Diagnostic Trouble Code (DTC) will be set in the VCM.
Ensure battery is fully charged. Ensure cable is properly connected on Data Link Connector (DLC). Turn ignition on. Perform EEPROM programming using the Techline equipment manufacturer's instructions and latest software applicable for the vehicle model.
Once EEPROM has been reprogrammed, use scan tool to reset Idle Air Control (IAC) valve. On Calif. models, go to next step. On Except Calif. models, go to step 5).
NOTE: If EEPROM programming fails, ensure all electrical connections on VCM are okay. Check Techline for latest software. If EEPROM programming still fails, replace VCM.

NOTE: Crankshaft Position (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.
Once EEPROM has been reprogrammed, perform powertrain On-Board Diagnostic (OBD) system check. See POWERTRAIN ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK in appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
Once EEPROM has been reprogrammed, Crankshaft Position (CKP) sensor variation learn procedure must be performed using proper procedure. Once Crankshaft Position (CKP) sensor variation learn procedure has been completed, perform powertrain On-Board Diagnostic (OBD) system check. See POWERTRAIN ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK in appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.