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SRS – Air Bag Modules and Clock Spring52B-30
INSPECTION
AIR BAG MODULE CHECK
If any improper part is found during the following inspection,
replace the air bag modules with a new one.
Dispose the old one according to the specified procedure.
(Refer to P.52B-32.)
Caution
Never attempt to measure the circuit resistance of the
air bag modules (squib) even if you are using the specified
tester. If the circuit resistance is measured with a tester,
accidental air bags deployment will result in serious
personal injury.
1. Check pad cover for dents, cracks or deformation.
2. Check connectors for damage, terminals for deformation,
and harness for binds.
3. Check air bag inflator case for dents, cracks or
deformation.
4. Install the air bag module to steering wheel to check
fit or alignment with the wheel.
Caution
If dents, cracks, deformation, or rust are discovered in
the air bag module, replace it with a new one.
Dispose of the old one according to the specified
procedure. (Refer to P.52B-32.)
CLOCK SPRING CHECK
If, as result of following checks, even one abnormal point
is discovered, replace the clock spring with a new one.
1. Check connectors and protective tube for damage, and
terminals for deformation.
2. Visually check the case for damage.

Inflator case
Connector

Inflator case
Connector
Protective tube
Case
Protective tube

SRS – Air Bag Modules and Clock Spring52B-31
3. Check that there is continuity between terminal (3) of
the clock spring No.1 connector and the No. 2 connector.
4. Joint the No.3 connector and No.4 connector of the clock
spring to connector No.6 and connector No.4 respectively,
of the SRS check harness.
NOTE
When joining SRS check harness connector No.4 align
its white paint with the hollow portion of the No.4 connector
of the clock spring.
5. Check for continuity between terminal 22 and terminal
25, and terminal 23 and terminal 24, of SRS Check
Harness connector No. 5 using a digital multi-meter.
14
2 3
SRS check harness (MB991613)
Clock spring
connector 4
Clock spring
connector 3
View A
4
5
6A

SRS – Air Bag Module Disposal Procedures52B-33
3. Peform the following procedure to deploy each air bag
module.

(1) Remove the steering column cover lower.
(2) Remove the connection between the clock spring
2-pin connector (red) and the body wiring harness
connector.
NOTE
If the clock spring connector is disconnected from
the body wiring harness, both electrodes of the clock
spring connector will be automatically shorted to
prevent unintended deployment of the air bag due
to static electricity, etc.
(3) Connect two wires, each six meters or longer, to the
two leads of SRS air bag adapter harness A and
cover the connections with insulation tape. The other
ends of the two wires should be connected to each
other (short-circuited), to prevent sudden unexpected
deployment of the air bag.
(4) Connect the clock spring or air bag module (front
passenger’s side) 2-pin connector (red) to SRS air
bag adapter harness A and pass the deployment
wires out of the vehicle.
(5) Shut all the doors with their window glasses closed
and cover the vehicle with a body cover to suppress
explosion noise leaks as much as possible.
Caution
Be sure to wrap the vehicle entirely in a body cover,
otherwise damaged glass panes could break into
fragments, bringing about a very dangerous situation.
(6) At a location as far away from the vehicle as possible,
disconnect the two connected wires from each other,
and connect them to the two terminals of the battery
(which has been removed from the vehicle) to deploy
the air bag.
Clock spring 2-pin
connector (red)
Body wiring harness
connector (2-pin)
SRS air bag
adapter
harness A
MB686560Connection
6 m or
longer
Two wires Insulation
tape
SRS air bag adapter
harness A
MB686560
2-pin connector (red)
Deployment wires
Body cover
Deployment
wire harness

SRS – Air Bag Module Disposal Procedures52B-35

(1) Remove the glove box. (Refer to P.52B-27.)
(2) Remove the connection between the air bag module
(front passenger’s side) connector (red 2-pin) and
the body wiring harness connector.
(3) Connect two wires, each six meters or longer, to the
two leads of SRS air bag adapter harness A and
cover the connections with insulation tape. The other
ends of the two wires should be connected to each
other (short-circuited), to prevent sudden unexpected
deployment of the air bag.
(4) Connect the clock spring or air bag module (front
passenger’s side) 2-pin connector (red) to SRS air
bag adapter harness A and pass the deployment
wires out of the vehicle.
(5) Shut all the doors with their window glasses closed
and cover the vehicle with a body cover to suppress
explosion noise leaks as much as possible.
Caution
Be sure to wrap the vehicle entirely in a body cover,
otherwise damaged glass panes could break into
fragments, bringing about a very dangerous situation.
(6) At a location as far away from the vehicle as possible,
disconnect the two connected wires from each other,
and connect them to the two terminals of the battery
(which has been removed from the vehicle) to deploy
the air bag.
Body wiring harness
connector
(2-pin)
Air bag module 2-pin
connector (red)
SRS air bag
adapter
harness A
MB686560Connection
6 m or
longer
Two wires Insulation
tape
SRS air bag adapter
harness A
MB686560
2-pin connector (red)
Deployment wires
Body cover
Deployment
wire harness

54-1
CHASSIS
ELECTRICAL
CONTENTS
GENERAL 3. . . . . . . . . . . . . . . . . . . . . . . . . .
BATTERY 3. . . . . . . . . . . . . . . . . . . . . . . . . . .
SERVICE SPECIFICATION 3. . . . . . . . . . . . . . .
ON-VEHICLE SERVICE 3. . . . . . . . . . . . . . . . . .
IGNITION SWITCH EVOLUTION-VI WITH IMMOBILIZER
SYSTEM> 6. . . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIAL TOOL 6. . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING 6. . . . . . . . . . . . . . . . . . . .
IGNITION SWITCH 11. . . . . . . . . . . . . . . . . . . . . .
IGNITION SWITCH AND IMMOBILIZER
SYSTEM IMMOBILIZER SYSTEM> 13. . . . . . . . . . .
SPECIAL TOOL 13. . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING 13. . . . . . . . . . . . . . . . . .
IGNITION SWITCH AND IMMOBILIZER
SYSTEM 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMBINATION METERS 22. . . . . . . . . . . .
SERVICE SPECIFICATIONS 22. . . . . . . . . . . .
SEALANT 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIAL TOOLS 23. . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING 24. . . . . . . . . . . . . . . . . .
CONTINUED ON NEXT PAGE
WARNINGS REGARDING SERVICING OF SUPPLEMENTAL RESTRAINT SYSTEM (SRS) EQUIPPED VEHICLES
WARNING!
(1) The service personnel must thoroughly review this manual, and especially its GROUP 52B – Supplemental Restraint
System (SRS) before beginning any service or maintenance of any component of the SRS or any SRS-related
component.
(2) When removing or installing the components indicated in the table of contents by an astarisk (*), use utmost care so
as not to apply any strong shock to SRS components.
NOTE
The SRS includes the following components: SRS-ECU, SRS warning lamp, air bag module, clock spring and interconnecting
wiring. Other SRS-related components (that may have to be removed/installed in connection with SRS service or maintenance) are
indicated in the table of contents by an asterisk (*).

54-2
ON-VEHICLE SERVICE 27. . . . . . . . . . . . . . . .
COMBINATION METERS 30. . . . . . . . . . . . . . .
HEADLAMP 32. . . . . . . . . . . . . . . . . . . . . . . .
SERVICE SPECIFICATIONS 32. . . . . . . . . . . .
SPECIAL TOOLS 32. . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING 33. . . . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE 34. . . . . . . . . . . . . . . .
HEADLAMP AND FRONT TURN-SIGNAL
LAMP* 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FRONT FOG LAMP 39. . . . . . . . . . . . . . . .
SERVICE SPECIFICATIONS 39. . . . . . . . . . . .
ON-VEHICLE SERVICE 39. . . . . . . . . . . . . . . .
FOG LAMP 41. . . . . . . . . . . . . . . . . . . . . . . . . . .
REAR COMBINATION LAMP* 42. . . . . . .
TROUBLESHOOTING 42. . . . . . . . . . . . . . . . . .
REAR COMBINATION LAMP* 42. . . . . . . . . .
SIDE TURN-SIGNAL LAMP 43. . . . . . . . .
SPECIAL TOOL 43. . . . . . . . . . . . . . . . . . . . . . . SIDE TURN-SIGNAL LAMP 43. . . . . . . . . . . .
HAZARD WARNING LAMP
SWITCH, CLOCK 44. . . . . . . . . . . . . . . . . . .
SPECIAL TOOL 44. . . . . . . . . . . . . . . . . . . . . . .
HAZARD WARNING LAMP SWITCH 44. . . .
RADIO AND TAPE PLAYER 45. . . . . . . .
TROUBLESHOOTING 45. . . . . . . . . . . . . . . . . .
RADIO AND TAPE PLAYER 47. . . . . . . . . . . .
SPEAKER 47. . . . . . . . . . . . . . . . . . . . . . . . .
ANTENNA 48. . . . . . . . . . . . . . . . . . . . . . . . .
POLE ANTENNA 48. . . . . . . . . . . . . . . . . . . . . .
REAR WINDOW ANTENNA AND GLASS
DIVERSITY ANTENNA 49. . . . . . . . . . . . . . . . .
REAR WINDOW DEFOGGER 50. . . . . . .
TROUBLESHOOTING AUTOMATIC A/C> 50. . . . . . . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE 50. . . . . . . . . . . . . . . .
REAR WINDOW DEFOGGER SWITCH
51. . .

CHASSIS ELECTRICAL – Ignition Switch54-7
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
Inspection Procedure 1
Key hole illumination lamp remains illuminated.
Probable cause
The cause is probably a harness short or a defective ETACS-ECU or buzzer ECU.
Malfunction of harness wire

Malfunction of ETACS-ECU

Malfunction of buzzer ECU
Disconnect the ignition key cylinder illumination lamp connector
B-84 and measure the continuity:

Between 4 and body earth
OK:ConductingNGCheck the harness wire between the ignition key cylinder illumination
lamp and junction block, and repair if necessary.
OK
Replace the ETACS-ECU or buzzer ECU.
Inspection Procedure 2
Even if driver’s side door is opened, key hole illumination
lamp does not illuminate.
Probable cause
The cause is probably a defective key hole illumination lamp circuit system, or a
defective driver’s side door switch input circuit system if the ignition key reminder
warning buzzer is also faulty.
Malfunction of driver’s side door switch

Malfunction of bulb

Malfunction of connector

Malfunction of harness wire

Malfunction of ETACS-ECU

Malfunction of buzzer ECU
OK
Replace ETACS-ECU or buzzer 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 ON.NG
Driver’s side door switch input circuit
system inspection (Refer to Inspection
Procedure 6 on P.54-10.)
OK
Disconncet the key hole illumination
lamp connector B-84, and measure at
the harness side.

Voltage between 3 and body earth
OK:System voltageNGCheck the following connectors:
B-49, B-75, B-73NG
Repair
OK
Check trouble symptom.
NG
Check the harness wire between
ETACS-ECU or buzzer ECU and fusible
link 1, and repair if necessary.
Vehicle with buzzer ECU
Remove ETACS-ECU or buzzer ECU
from junction block, and measure at the
junction block connector B-79

Ignition key cylinder illumination
lamp connector connected

Voltage between 12 and body earth
OK:System voltage
OK
OK
NG
Check the following connectors:
B-84, B-49, B-75, B-73NG
Repair
OK
Check trouble symptom.
Check the harness wire between the
ignition key cylinder illumination lamp
and fusible link 1, and repair if neces-
sary.
NG

CHASSIS ELECTRICAL – Ignition Switch54-8
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.
Malfunction of fuse

Malfunction of connector

Malfunction of harness

Malfunction of ETACS-ECU

Malfunction of buzzer ECU
OK
Replace 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.

NG
Disconnect the junction block connector
B-76 and measure at the harness side.

Voltage between the terminal No.
8 and body earth.
OK:System voltageNGCheck the following connectors:
B-76, B-79Repair
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 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

CHASSIS ELECTRICAL – Ignition Switch54-11
IGNITION SWITCH
REMOVAL AND INSTALLATION
123 4 5
67
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-ECUIgnition 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
A10. Steering lock cylinder
11. Key reminder switch
12. Ignition switch