
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.