Mitsubishi Lancer Evolution IV, Workshop Manual

Page: 348 / 391

CHASSIS ELECTRICAL –
Ignition Switch
54-8
Inspection Procedure 3
While key hole illumination lamp is illuminated, ignition
key is turned to the ON position but key hole illumination
lamp does not switch off. (However, it switch off after 15
seconds.) Probable cause
While the key reminder warning buzzer is sounding, the
ignition key is turned to the ON position but the sound
dose not stop. (However, it stops when the driver’s side
door is closed.)
The cause is probably a malfunction of the ignition switch input circuit, ETACS-ECU
or buzzer ECU. Furthermore, if there is a malfunction of a multipurpose fuse, the
cause may also be a short circuit in a harness.
D
Malfunction of fuse
D
Malfunction of connector
D
Malfunction of harness
D
Malfunction of ETACS-ECU
D
Malfunction of buzzer ECU
OK
Replace ETACS-ECU.
<Vehicles with ETACS-ECU>
MUT-
II Pulse check
Ignition switch input inspection
OK: The MUT
-II
buzzer sounds once
when the ignition key is turned
to the ON from OFF position.
<Vehicles with buzzer ECU>
NG
Disconnect the junction block connector
B-76 and measure at the harness side.
D
Voltage between the terminal No.
8 and body earth.
OK: System voltage
NG Check the following connectors:
B-76, B-79
Repair
OK
Check trouble symptom.
Replace the buzzer ECU.
Replace ETACS-ECU.
Check the harness wire between the
ignition switch (IG1) and junction block
and repair if necessary.
OK
Junction block harness continuity check
NG
NOTE
The stop indicated with a dotted line
applies only to vehicles with buzzer
ECU.
OK
NG
Replace
NG