Mitsubishi Lancer Evolution VI. Manual — part 101
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
CHASSIS ELECTRICAL –
Ignition Switch
54-9
Inspection Procedure 4
The key reminder warning buzzer dose not stop sounding
even if the key is removed. (However, it stops when the
driver’s side door is closed.)
Probable cause
The cause is probably a malfunction of the key reminder switch input circuit system,
or a malfunction of ETACS-ECU, or a malfunction of buzzer ECU.
D
Malfunction of key reminder switch
D
Malfunction of connector
D
Malfunction of harness
D
Malfunction of ETACS-ECU
D
Malfunction of buzzer ECU
YES
Check the following connectors.
B-84, B-75
NG
NG
Inspect the harness between the key
reminder switch and ETACS-ECU or
buzzer ECU, and repair if necessary.
OK
Check trouble symptom.
OK
Replace the ETACS-ECU or the buzzer
ECU.
OK
NG
Key reminder switch continuity inspec-
tion (Refer to P. 54-12.)
NG
Replace
<Vehicles with ETACS-ECU>
MUT
-II
Pulse check
Ignition switch input inspection
OK: The MUT
-II
buzzer sounds once
when the ignition key is removed
from the key cylinder.
OK
Replace the ETACS-ECU.
Replace
OK
Check trouble symptom
OK
Disconnect the key reminder switch
connector and connect the terminal No.
5 to the body earth. Does the buzzer
stop sounding?
NO
Check the following connectors.
B-84, B-75, B-79
NG
Repair
<Vehicles with buzzer ECU>
Check the harness wire between the
key reminder switch and the body earth
and repair if necessary.
Replace the buzzer ECU.
NOTE
The stop indicated with a dotted line
applies only to vehicles with buzzer
ECU.
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
CHASSIS ELECTRICAL –
Ignition Switch
54-11
IGNITION SWITCH
REMOVAL AND INSTALLATION
1
2
3
4
5
6
7
8
9
10
11
12
9
ETACS-ECU or buzzer ECU removal
steps
1. Cowl side trim (R.H.)
2. Junction block
3. Buzzer control unit ETACS-ECU
Ignition switch removal steps
4. Hood lock release handle
5. Driver side lower panel
6. Column cover, lower
7. Column cover, upper
8. Illumination ring or ring cover
9. Key hole illumination lamp bulb
A
A
"
10. Steering lock cylinder
11. Key reminder switch
12. Ignition switch
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