Mitsubishi Lancer Evolution IV, Workshop Manual

Page: 350 / 391

CHASSIS ELECTRICAL –
Ignition Switch
54-10
Inspection Procedure 5
The key reminder warning buzzer dose not sound even if
the driver’s side door is opened while the key is still
inserted. (However, the ignition key should be in the OFF
position.) Probable cause
The cause is probably a malfunction of the door switch input circuit system, if the
key hole illumination lamp is also faulty. A malfunction of the key reminder switch
input circuit system is also suspected.
D
Malfunction of door switch
D
Malfunction of key reminder switch
D
Malfunction of connector
D
Malfunction of harness
D
Malfunction of ETACS-ECU
D
Malfunction of buzzer ECU
Driver’s side door switch input circuit
system inspection (Refer to Inspection
Procedure 6 on P.54-10.)
OK
<Vehicles with ETACS-ECU>
MUT -II Pulse check
Key reminder switch input inspection
OK: The MUT
-II buzzer sounds once
when the ignition key is removed
from the key cylinder.
NG
Key reminder switch continuity inspec-
tion (Refer to P.54-12.)
NG
Replace
OK
Inspect the harness between the key
reminder switch and junction block.
NG
Repair
OK
Replace the ETACS-ECU.
OK
<Vehicles with ETACS-ECU>
MUT -II Pulse check
Driver’s side door switch input signal
OK: The MUT
-II buzzer sounds once
when the driver’s side door switch
is turned to the ON position.
NG
OK
Junction block harness continuity check
NG
Repair
<Vehicles with buzzer ECU>
OK
Inspect the harness between the key
reminder switch and body earth.
Replace the buzzer ECU.
NOTE
The stop indicated with a dotted line
applies only to vehicles with buzzer
ECU.
NG
Repair
Inspection Procedure 6
Driver’s side door switch input circuit system inspection
Door switch inspection
NG
Replace
OK
Disconnect the door switch connector
D-03 and measure at the harness side.
D
Voltage between the terminal No.
2 and body earth
OK: System voltage
NG
Check the following connectors.
B-80, B-79
NG
Repair
OK
Check trouble symptom.
NG
Check the harness between the ETACS-
ECU or buzzer ECU door switch and
repair if necessary.
OK
Check trouble symptom.
NG
Replace the ETACS-ECU or the buzzer
ecu.
OK
Check the following connectors.
D-03