Lancer L4-2.4L SOHC (2005)
1. Connect scan tool MB991958 to the data link connector.
2. Connect SWS monitor kit MB991813 to the column switch connector.
3. Operate scan tool MB991958 according to the procedure below to display "COLUMN ECU.
a. Select "SYSTEM SELECT."
b. Select "SWS."
c. Select "SWS MONITOR."
d. Select "DATA LIST."
e. Select "COLUMN ECU."
4. Check that normal conditions are displayed on the items described in the table.
Q: Is normal condition displayed on the "PASSING SW"?
YES: Replace the front-ECU. When the passing switch is turned "ON", the headlights (low-beam and high-beam) should illuminate normally.
NO: Refer to Inspection Procedure M-5 "ETACS-ECU does not receive any signal from the passing switch."
Inspection Procedure I-5
Headlight and Taillight: Headlights do not illuminate when the lighting switch is at "AUTO," "TAIL," and "PASSING" position, but
illuminate at low-beam when the switch is at "head" position. at this position, the headlights cannot be changed into high beam by operating
the dimmer switch.
NOTE: This troubleshooting procedure requires the use of scan tool MB991958 and SWS monitor kit MB991813. For details on how to use the SWS
monitor, refer to "How to use SWS monitor." See: Reading and Clearing Diagnostic Trouble Codes/How To Use SWS Monitor
