Page 3009 of 4179
PREPARATION
SRS-5
C
D
E
F
G
I
J
K
L
MA
B
SRS
Commercial Service ToolsEHS000CG
Tool name Description
Tamper resistant TORX bit Size: T30
S-NT757
Page 3010 of 4179

SRS-6
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)PFP:28556
SRS ConfigurationEHS000CH
The air bag deploys if the diagnosis sensor unit activates while the ignition switch is in the ON or START posi-
tion.
The collision modes for which supplemental restraint systems are activated are different among the SRS sys-
tems. For example, the driver air bag module and front passenger air bag module are activated in a frontal col-
lision but not in a side collision.
SRS configurations which are activated for some collision modes are as follows;
Front Seat Belt Pre-tensioner with Load LimiterEHS000CI
The seat belt pre-tensioner system with load limiter is installed to
both the driver's seat and the front passenger's seat. It operates
simultaneously with the SRS air bag system in the event of a frontal
collision with an impact exceeding a specified level.
When the frontal collision with an impact exceeding a specified level
occurs, seat belt slack resulting from clothing or other factors is
immediately taken up by the pre-tensioner. Vehicle passengers are
securely restrained.
When passengers in a vehicle are thrown forward in a collision and
the restraining force of the seat belt exceeds a specified level, the
load limiter permits the specified extension of the seat belt by the
twisting of the ELR shaft, and a relaxation of the chest-area seat belt
web tension while maintaining force.
PHIA0037E
SRS configuration Frontal collision Left side collision Right side collision
Driver air bag module×——
Front passenger air bag module×——
Front LH seat belt pre-tensioner×——
Front RH seat belt pre-tensioner×——
Front LH side air bag module —×—
Front RH side air bag module — —×
SRS444
Page 3011 of 4179
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
SRS-7
C
D
E
F
G
I
J
K
L
MA
B
SRS
Front Side Air BagEHS000CJ
Front side air bag is built-in type.
The front seatbacks with built-in type side air bag have the labels
shown in figure at right.
PHIA0039E
Page 3012 of 4179

SRS-8
TROUBLE DIAGNOSIS
TROUBLE DIAGNOSISPFP:00004
Trouble Diagnosis IntroductionEHS000CL
CAUTION:
Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harness can be identified by yellow and/or orange harnesses or har-
ness connector.
Do not attempt to repair, splice or modify the SRS wiring harness. If the harness is damaged,
replace it with a new one.
Keep ground portion clean.
DIAGNOSIS FUNCTION
The SRS self-diagnosis results can be read by using “AIR BAG” warning lamp and/or CONSULT-II.
The User mode is exclusively prepared for the customer (driver). This mode warns the driver of a system mal-
function 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-II are as follows:
NOTE:
Seat belt pre-tensioner malfunction is indicated by “AIR BAG” warning lamp.
HOW TO PERFORM TROUBLE DIAGNOSES FOR QUICK AND ACCURATE REPAIR
A good understanding of the malfunction conditions can make troubleshooting faster and more accurate.
In general, each customer feels differently about a malfunction. It is important to fully understand the symp-
toms or conditions for a customer complaint.
Information From Customer
WHAT..... Vehicle model
WHEN..... Date, Frequencies
WHERE..... Road conditions
HOW..... Operating conditions, Symptoms
Preliminary Check
Check that the following parts are in good order.
Battery (Refer to SC-3, "How to Handle Battery" .)
Fuse (Refer to SRS-11, "Wiring Diagram — SRS — /LHD models" or SRS-13, "Wiring Diagram — SRS
— /RHD models" .)
System component-to-harness connections
User mode Diagnosis mode Display type
“AIR BAG” warning lamp X X ON-OFF operation
CONSULT-II — X Monitoring
Page 3013 of 4179
TROUBLE DIAGNOSIS
SRS-9
C
D
E
F
G
I
J
K
L
MA
B
SRS
WORK FLOW
*1:SRS-8, "Preliminary Check".*2:SRS-17, "SRS Operation Check".*3:SRS-19, "DIAGNOSTIC PROCE-
DURE 2".
*4:SRS-24, "
DIAGNOSTIC PROCE-
DURE 4".
PHIA0297E
Page 3014 of 4179
SRS-10
TROUBLE DIAGNOSIS
Component Parts LocationEHS000CM
PHIA0020E
Page 3015 of 4179
TROUBLE DIAGNOSIS
SRS-11
C
D
E
F
G
I
J
K
L
MA
B
SRS
Wiring Diagram — SRS — /LHD modelsEHS000CO
THWA0031E
Page 3016 of 4179
SRS-12
TROUBLE DIAGNOSIS
THWA0032E