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SRC-8
< SYSTEM DESCRIPTION >
COMPONENT PARTS
Crash Zone Sensor
INFOID:0000000012430596
The crash zone sensor is located in front of the radiator. The crash
zone sensor sends signals to the air bag diagnosis sensor unit dur-
ing a frontal collision. This sensor may be identified by a yellow con-
nector.
Front Side Air Bag Satellite SensorINFOID:0000000012430597
The front side air bag satellite sensors are located on the front center
pillar LH and RH next to the seat belt pretensioners. The front side
air bag satellite sensors send signals to the air bag diagnosis sensor
unit during a side collision. These sensors may be identified by yel-
low connectors.
Rear Side Air Bag Satellite SensorINFOID:0000000012430598
The rear side air bag satellite sensors are located behind the lug-
gage side lower finisher LH and RH. The rear side air bag satellite
sensors send signals to the air bag diagnosis sensor unit during a
side collision. These sensors may be identified by yellow connec-
tors.
Front Door Satellite SensorINFOID:0000000012430599
The front door satellite sensors are located in the driver and passen-
ger doors. The front door satellite sensors send signals to the air bag
diagnosis sensor unit during a side collision. These sensors may be
identified by yellow connectors.
SRS Component ConnectorsINFOID:0000000012430600
DIRECT CONNECT
The following SRS components use direct-connect style harness connectors.
AWHIA0537ZZ
AWHIA0544ZZ
AWHIA0543ZZ
AWHIA0546ZZ
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COMPONENT PARTSSRC-9
< SYSTEM DESCRIPTION >
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• Driver front air bag module
• Passenger front air bag module
• LH side curtain air bag module
• RH side curtain air bag module
• Front LH seat belt pre-tensioner
• Front RH seat belt pre-tensioner
Always pull up to release locking tab prior to removing connector
from SRS component.
Always push down to lock locking tab after installing connector to
SRS component. When locked, the locking tab is level with the con-
nector housing.
SLIDE DOUBLE LOCKING
• A new style slide double locking type connector is used on certain systems and components, especially those related to airbag control systems.
• The slide double locking type connectors help prevent incomplete locking and accidental looseness or dis-
connection.
• The slide double locking type connectors are disconnected by pushing or pulling the slider. Refer to the fig- ure below.
CAUTION:
• Do not pull the harness or wires when disconnecting the connector.
WHIA0103E
AAMIA0498GB
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SRC-10
< SYSTEM DESCRIPTION >
SYSTEM
SYSTEM
SRS AIR BAG SYSTEM
SRS AIR BAG SYSTEM : System DescriptionINFOID:0000000012430601
SYSTEM DIAGRAM
DESCRIPTION
• The air bag deploys if the air bag diagnosis sensor unit is activated while the ignition switch is in the ON orSTART position.
• The collision modes for which supplemental restraint systems are activated are different among the SRS
systems. For example, the driver air bag module, fr ont passenger air bag module and front seat belt pre-ten-
sioners are activated in a frontal collision but not in a side collision.
SRS Collision Modes
OCCUPANT CLASSIFICATION SYSTEM
AWHIA0326GB
SRS configuration Frontal collision Left side collision Right side collision
Driver air bag module x— —
Front passenger air bag module x— —
Front LH seat belt pre-tensioner x— —
Front RH seat belt pre-tensioner x— —
Front LH side air bag module —x —
Front RH side air bag module —— x
LH side curtain air bag module —x —
RH side curtain air bag module —— x
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SYSTEMSRC-11
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OCCUPANT CLASSIFICATION SYSTEM : System DescriptionINFOID:0000000012430602
SYSTEM DIAGRAM
DESCRIPTION
The occupant classification system (OCS) identifies diff erent size occupants, out of position occupants, and
detects if child seat is present in the front passenger seat. The OCS control unit (2) receives inputs from the
occupant classification sensors (1) (located on the pa ssenger seat track assembly). Depending on classifica-
tion of the passenger, the OCS sends a signal to the air bag diagnosis sensor unit. The air bag diagnosis sen-
sor unit uses this signal and the seat belt buckle swit ch RH signal to determine deployment or non deployment
of the passenger front air bag in the event of a co llision. Depending on the signals received, the air bag diag-
nosis sensor unit can disable the passenger front air bag completely. The OCS (weight sensors) must be set
to zero point using CONSULT after servicing the OCS system.
NOTE:
• CONSULT can be used to confirm when “zero point reset” for OCS is complete.
• Always perform zero point reset after the removal and installation of the seat or when disconnecting the OCS control unit harness connector even if zero point reset has been completed in the past.
• If zero point reset is incomplete, the passenger air bag will be disabled and the passenger air bag off indica-
tor will be ON.
• In case of customer concern, CONSULT can be us ed to confirm the passenger air bag status (readiness).
Passenger Air Bag Status Conditions
NOTE:
AWHIA0656GB
Front Passenger Seat
(Condition) PASS AIR BAG OFF Indicator
(Status) Passenger Air Bag Status
(Readiness) CONSULT Display
Seat occupied OFF Active (enabled)ON
Seat occupied
NOTEON Deactivated (disabled) OFF
Seat empty OFF Deactivated (disabled) OFF
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SRC-12
< SYSTEM DESCRIPTION >
SYSTEM
Passenger does not meet Occupant Classification System specifications for passenger air bag activation.
SEAT BELT WARNING LAMP SYSTEM
SEAT BELT WARNING LAMP SYSTEM : System DescriptionINFOID:0000000012430603
SYSTEM DIAGRAM
AWHIA0548ZZ
AWHIA0694GB
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SYSTEMSRC-13
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The seat belt warning lamp (1) will remind the driver if the driver or front passenger seat belt should be buck-
led. The system works in conjunction with the occupant classification system. Refer to SRC-11, "
OCCUPANT
CLASSIFICATION SYSTEM : System Description".
Seat Belt Warning System Operation
AWHIA0709ZZ
Driver seat status
(Ignition switch ON)Passenger seat status Seat belt buckle switch
LH status Seat belt buckle switch
RH status Seat belt warning lamp
Seat occupied Seat occupied
Buckled Buckled
Off
Unbuckled On
Seat unoccupied —Off
— Unbuckled On
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SRC-14
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (AIR BAG)
DIAGNOSIS SYSTEM (AIR BAG)
DescriptionINFOID:0000000012430604
CAUTION:
• Never use electrical test equipment on any circuit related to the SRS unless instructed in this Ser-
vice Manual. SRS wiring harnesses can be identifi ed by yellow and/or orange harnesses or harness
connectors.
• Never repair, splice or modify the SRS wiring harn ess. If the harness is damaged, replace it with a
new one.
• Keep ground portion clean.
DIAGNOSIS FUNCTION
• The SRS self-diagnostic results can be read with air bag warning lamp and/or CONSULT.
• The user mode is exclusively prepared for the customer (driver). This mode warns the driver of a system
malfunction through the operation of the air bag warning lamp.
• The diagnosis mode allows the technician to locate and inspect the malfunctioning part.
• The mode applications for the air bag warning lamp and CONSULT are as per the following items.
× : Application, —: Not application
On Board Diagn osis FunctionINFOID:0000000012430605
ON-BOARD DIAGNOSIS
There are two self diagnosis functions with air bag warning lamp per the following items.
•USER MODE
• DIAGNOSIS MODE
METHOD OF STARTING
• Diagnosis mode changes from user mode to diagnosis mode when changing operation is performed.
• In user mode, when SRS air bag warning lamp is not turning ON, changing to diagnosis mode by ignition
switch operation is not possible.
• In diagnosis mode, when repair is complete and system is normal, the mode changes to user mode when
ignition switch is turned from OFF to ON.
Procedure to Change Diagnosis Mode
1. Turn ignition switch from OFF to ON.
2. SRS air bag lamp turns ON for 7 seconds and turns OFF, then turn ignition switch OFF within 2 seconds after the lamp turns OFF.
NOTE:
When in Diagnosis Mode, the air bag warning lamp may illuminate for more than 7 seconds after the igni-
tion switch is turned ON. If this is the case, the i gnition switch must still be cycled OFF after 7 seconds.
3. After turning ignition switch OFF, wait for 3 seconds or more.
4. Repeat operation 1 to 3 for 2 times so that operation 1 to 3 is repeated for 3 times in total.
5. Turn ignition switch from OFF to ON. Diagnosis mode changes.
USER MODE
In USER MODE, air bag warning lamp on combination meter turns ON when a malfunction is detected and
warns the customer (driver).
How to Read Air Bag Warning Lamp
1. Turn the ignition switch from OFF to ON, and check that the air bag warning lamp turns ON.
2. Compare the air bag warning lamp operation pattern with the examples.
Air Bag Warning Lamp Examples:
Diagnosis tool User modeDiagnosis mode
Air bag warning lamp ××
CONSULT –×
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DIAGNOSIS SYSTEM (AIR BAG)SRC-15
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Air bag warning lamp flashing pattern (User Mode)
DIAGNOSIS MODE
NOTE:
Diagnosis Mode can not be entered if a malfunction is not detected in User Mode.
1. Turn ignition switch ON.
2. After AIR BAG warning lamp lights for 7 seconds, turn ignition switch OFF within 1 second.
3. Wait more than 3 seconds.
4. Repeat steps 1 to 3 two more times (3 times total).
5. Turn ignition switch ON.
SRS is now in Diagnosis Mode. Refer to SRC-21, "
Flash Code Index".
Warning lamp SRS conditionReference item
• No malfunction is detected.
• No further action is necessary. —
The system is malfunctioning and
needs to be repaired. Refer to SRC-16, "
Trouble Diagno-
sis with CONSULT" or SRC-14, "On
Board Diagnosis Function".
• Air bag is deployed.
• Seat belt pre-tensioner is deployed. Refer to
SR-5, "
For Frontal Collision"
or SR-7, "
For Side and Rollover Col-
lision".
• Air bag diagnosis sensor unit is mal- functioning.
• Air bag power supply circuit is mal- functioning.
• SRS air bag warning lamp circuit is
malfunctioning. Refer to SRC-97, "
Diagnosis Proce-
dure".
• Air bag diagnosis sensor unit is mal- functioning.
• Air bag warning lamp circuit is mal- functioning. Refer to SRC-98, "
Diagnosis Proce-
dure".
SHIA0011E
SHIA0012E
SHIA0013E
SHIA0014E
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