Mitsubishi Electric Lancer Evolution-VII Workshop Manual page 500

Inspection Procedure K-1
When the ignition switch is in the LOCK (OFF) position,
no functions work normally.
Checking of the ETACS-ECU battery power supply circuit
system.
As a fault in this circuit disables ETACS-ECU functions when the ignition switch
is in the LOCK (OFF) position, any abnormality in this signal prevents the
following functions operating.
D Lights left ON reminder warning function
D Power window timer function
D Headlamp automatic cut-off function
Or, the following functions operate when the ignition switch is in the ON position
only.
D Diagnosis code reading and input signal check by MUT-II.
D Central locking
D Headlamps, tail lamps
D Hazard lamps
D Room lamps
Measure at ETACS-ECU connector C-226.
D Disconnect the connector and test on the junction box
side.
D Voltage between terminal 20 and body earth.
OK : System voltage
Replace ETACS-ECU.
SWS -
OK
Troubleshooting
Probable cause
Probable cause
D ETACS-ECU fault
D Harness or connector fault
NG
Check the following connectors:
C-226, C-209, C-05, C-135
OK
Check the trouble
symptoms.
NG
Check the harness between ETACS-ECU and battery and
repair if necessary.
54B-33
NG
Repair