Page 353 of 396
CHASSIS ELECTRICAL – Ignition Switch54-9
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.Malfunction of key reminder switch
Malfunction of connector
Malfunction of harness
Malfunction of ETACS-ECU
Malfunction of buzzer ECU
YES
Check the following connectors.
B-84, B-75NG
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
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.OKReplace 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?NOCheck the following connectors.
B-84, B-75, B-79NG
Repair
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.
Page 354 of 396
CHASSIS ELECTRICAL – Ignition Switch54-10
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.Malfunction of door switch
Malfunction of key reminder switch
Malfunction of connector
Malfunction of harness
Malfunction of ETACS-ECU
Malfunction of buzzer ECU
Driver’s side door switch input circuit
system inspection (Refer to Inspection
Procedure 6 on P.54-10.)
OK
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.NGKey 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
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 checkNG
Repair
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 inspectionNG
Replace
OK
Disconnect the door switch connector
D-03 and measure at the harness side.
Voltage between the terminal No.
2 and body earth
OK:System voltageNGCheck the following connectors.
B-80, B-79NG
Repair
OK
Check trouble symptom.NGCheck 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
Page 377 of 396
CHASSIS ELECTRICAL – Headlamp54-33
TROUBLESHOOTING
DIAGNOSIS FUNCTION
INPUT SIGNAL INSPECTION POINTS
Refer to Group 00 – How to Use Troubleshooting / Inspection Service Points.
The lighting monitor buzzer does not sound even when
the ignition key is removed with the tail lamps or
headlamps ON and the driver’s side door open. [However,
the key reminder warning buzzer sounds when inserting
the key into the ignition key cylinder.
Probable cause
The cause is probably a malfunction of the lighting switch input circuit system or
a malfunction of ETACS-ECU or buzzer ECU. When the key reminder warning buzzer
is sounding, the lighting monitor warning buzzer does not sound even if the tail lamps
or headlamps are lit.Malfunction of harness or connector
Malfunction of ETACS-ECU
Malfunction of buzzer ECU
MUT-II Pulse check
OK:MUT-II buzzer sounds once
when the lighting switch is
turned from OFF to TAIL or
HEAD.NG
Check the following connectors.
B-79Repair
OK
Check trouble symptom.NGOK
Replace the ETACS-ECU.
NG
Check the harness in the junction block.NG
Replace the ETACS-ECU or the buzzer
ECU.OKRepair NG
Page 386 of 396
CHASSIS ELECTRICAL – Rear Combination Lamp54-42
REAR COMBINATION LAMP
TROUBLESHOOTING
For the troubleshooting of the lighting monitor warning buzzer, refer to P.54-33.
REAR COMBINATION LAMP
REMOVAL AND INSTALLATION
Caution: SRS
Before removal of air bag module and clock spring, refer to GROUP 52B – SRS Service Precautions and Air Bag
Module and Clock Spring.
2
1
3
1. Column switchRear combination lamp removal
steps
2. Rear end trim
3. Rear combination lamp
INSPECTION
LIGHTING SWITCH CONTINUITY CHECK
Switch positionTerminal No.
Connector BConnector A
5671
LIGHTING
SWITCH
OFF
SWITCHTAIL
HEAD
Connector A Connector B
Page 388 of 396
CHASSIS ELECTRICAL – Hazard Warning Lamp Switch, Clock
ILL
ILL
54-44
HAZARD WARNING LAMP SWITCH, CLOCK
SPECIAL TOOL
ToolNumberNameUse
MB990784Ornament removerAir conditioner panel removal
HAZARD WARNING LAMP SWITCH
REMOVAL AND INSTALLATION
2
1 3
4
Hazard warning lamp switch
removal steps
1. Air conditioner panel
2. Switch holder
3. Hazard warning lamp switchClock removal steps
1. Air conditioner panel
4. Clock
INSPECTION
HAZARD WARNING LAMP SWITCH CONTINUITY
CHECK
Switch
iti
Terminal No.
position1245679–10
OFF
ON
