The Room Lamps Do Not Come On Or Off Normally - Mitsubishi Lancer Evolution-VII Workshop Manual

Inspection Procedure I-1

The room lamps do not come ON or OFF normally.

The ETACS-ECU controls the room lamp ON/OFF operation based on input
signals from the following.
D Ignition switch (ACC)
D Ignition switch (IG1)
D Driver's door switch D Driver s door switch
D All door switches
D Driver's door lock actuator
If the room lamp ON/OFF operation is defective, either one of the above input circuit
systems or the ETACS-ECU may be defective.
When the ignition switch is in the LOCK (OFF) position, do
the hazard lamps work?
Check the MUT-II input signals.
D Ignition switch (ACC)
D Ignition switch (IG1)
D Driver's door switch
D All door switches
Check the front and rear room lamp bulbs.
Check the following connectors: C-226, C-218, D-03, D-05
Check the trouble symptoms.
Check the harness between ETACS-ECU and the front and
rear room lamps.
Check the trouble symptoms.
Replace ETACS-ECU.
SWS -
YES
OK
OK
OK
NG
OK
NG
Troubleshooting
Probable cause
D Door switch fault
D Driver's door lock actuator fault
D ETACS-ECU fault
D Harness or connector fault
NO
Check ETACS-ECU battery power circuit system (Refer to
P.54B-33, Inspection Procedure K-1).
NG
Check the defective input circuit. (Refer to P.54B-8, Defects
Found by Input Signal Check).
NG
Repair
NG
Repair
54B-25