Lancer L4-2.0L SOHC (2004)
1. Connect scan tool MB991958 to the data link connector.
2. Operate scan tool MB991958 as follows:
1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "PULSE CHECK."
3. Push the transmitter "LOCK" or "UNLOCK" switch.
4. Check that scan tool MB991958 sounds
Q: When the transmitter "LOCK" or "UNLOCK" switch is turned ON, does scan tool MB991958 sound?
YES: Replace the ETACS-ECU. All the doors can be locked or unlocked by means of the transmitter.
NO: Refer to Inspection Procedure O-9 "ETACS-ECU does not receive a signal from the lock or unlock switch."
Inspection Procedure E-2
Keyless Entry System: The front dome light, the turn-signal lights and the horn do not operate through the answerback function.
