Password Learn Procedure For Anti-Theft System (2.2L Engine)

Password learn procedure must be performed if Truck Body Controller (TBC) or passlock sensor is replaced. A password is communicated between TBC and Powertrain Control Module (PCM) to provide engine operation. If TBC has been replaced, the PCM must learn the password from the TBC. If password learn procedure is not performed, a Diagnostic Trouble Code (DTC) may be set in the PCM when attempting to start the engine.
Attempt to start engine and then leave ignition on. DO NOT turn ignition off. The SECURITY indicator light will flash for 4 seconds and then remain on steady for about 10 minutes and then turn off. SECURITY indicator light is located on center of instrument panel, just above the turn signal indicators. Once SECURITY indicator light turns off, turn ignition off.
NOTE: If PCM has been replaced, the Electronically Erasable Programmable Read Only Memory (EEPROM) should be programmed. When EEPROM has been programmed, the PCM will learn the password when ignition is initially turned on. Password learn procedure is not required when replacing the PCM and EEPROM is programmed.
Repeat step 2) two more times. When SECURITY indicator light turns off on the third ignition cycle, attempt to start the engine. If engine starts, the password learn procedure is complete. If password is not learned, a Diagnostic Trouble Code (DTC) may be set in PCM. Perform test procedures for specified DTC and repair as necessary. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.