Maintenance Items
CAUTION:
Do not use a circuit tester to check SRS circuit.
1. Check operation of ``AIR BAG'' warning lamp.
After turning ignition key to ``ON'' position, both warning lamps
illuminate. The ``AIR BAG'' warning lamp will go off after about
7 seconds if no malfunction is detected.
If any of the following warning lamp conditions occur, immedi-
ately check the air bag or seat belt pre-tensioner system. Refer
to RS-30 for details.
+The ``AIR BAG'' warning lamp does not illuminate when the
ignition switch is turned ``ON''.
+The ``AIR BAG'' warning lamp does not go off about 7 seconds
after the ignition switch is turned ``ON''.
+The ``AIR BAG'' warning lamp blinks about 7 seconds after the
ignition switch is turned ``ON''.
2. Visually check SRS components.
(1) Diagnosis sensor unit
+Check diagnosis sensor unit and bracket for dents, cracks or
deformities.
+Check connectors for damage, and terminals for deformities.
(2) Air bag module and steering wheel
+Remove air bag module from steering wheel or instrument
panel. Check harness cover and connectors for damage, ter-
minals for deformities, and harness for binding.
+Install driver air bag module to steering wheel to check ®t or
alignment with the wheel.
+Check steering wheel for excessive free play.
+For dual air bag system, install passenger air bag module to
instrument panel to check ®t or alignment with the instrument
panel.
(3) Spiral cable
+Check spiral cable for dents, cracks, or deformities.
+Check connectors and protective tape for damage.
+Check steering wheel for noise, binding or heavy operation.
(4) Harness related to SRS
+Check connectors for poor connections, damage, and terminals
for deformities.
+Check harnesses for binding, cha®ng or cut.
(5) Seat belt pre-tensioner
+Check harness cover and connectors for damage, terminals for
deformities, and harness for binding.
+Check belts for damage and anchors for loose mounting.
+Check retractor for smooth operation.
+Perform self-diagnosis for seat belt pre-tensioner using
bulb or CONSULT. Refer to ``SRS Operation Check'' for details.
(RS-30)
CAUTION:
Replace previously used special bolts, ground bolt and anchor
bolt with new ones.
SRS451
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-11
WORK FLOW
ACTION ITEMREFERENCE ITEM
Check in
Listen to customer complaints and requests.
Perform preliminary check.bPreliminary check (RS-24)
Check for any Service Bulletin.
Check air bag system operation by using ``AIR BAG'' warning lamp.
Ð User mode
Check seat belt pre-tensioner system operation by using a bulb.bSRS Operation Check
DIAGNOSTIC PROCEDURE 1
(RS-30)
cInspect malfunctioning part. Ð Diagnosis mode
Perform self-diagnosis using CONSULT.
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------OR ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Perform self-diagnosis using ``AIR BAG'' warning lamp.bDIAGNOSTIC PROCEDURE 2:
Using CONSULT (RS-32)
DIAGNOSTIC PROCEDURE 6:
Using ``AIR BAG'' warning lamp
(RS-39)
Repair/Replace
NGFinal check Ð Diagnosis mode and User mode
CONSULT can only show one seat belt pre-tensioner malfunction as
self-diagnosis result at a time. Check self-diagnosis result with CON-
SULT whether other malfunctions are detected after repairing one
seat belt pre-tensioner malfunction.
OK
bDIAGNOSTIC PROCEDURE 3:
Using CONSULT (RS-34)
DIAGNOSTIC PROCEDURE 7:
Using ``AIR BAG'' warning lamp
(RS-40)
Check out
.
.
.
.
.
.
.
.
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
How to Perform Trouble Diagnoses for Quick
and Accurate Repair (Cont'd)
RS-25
Checking seat belt pre-tensioner system operation
Check seat belt pre-tensioner system operation using a bulb as
follows:
1. Connect a bulb of less than 3.4W between data link connector
terminals
V7andV11.
2. After turning ignition switch from ``OFF'' to ``ON'', the bulb oper-
ates.
3. Compare the bulb operation to the chart below.
Lighting condition of the bulb SRS condition Reference item
MRS095A
No malfunction is
detected.
No further action is neces-
sary.
Ð
MRS096A
+Seat belt pre-tensioner
circuit is opened, or
+Seat belt pre-tensioner
power supply or ground
circuit is shorted.+If CONSULT is
available, go to DIAG-
NOSTIC PROCEDURE
2 (RS-32).
+If CONSULT is not
available, repair the sys-
tem as follows.*
1. Visually check the wir-
ing harness connec-
tions.
2. Replace the harness if it
has visible damage.
3. Replace driver's and
front passenger seat
belt assemblies.
(Before disposing, they
must be deactivated.)
4. Replace diagnosis sen-
sor unit.
MRS097A
Seat belt pre-tensioner
(and air bag) is deployed.Go to COLLISION DIAG-
NOSIS (RS-45).
* Follow the procedures in numerical order when repairing malfunctioning parts. Con®rm whether malfunction is eliminated
using a bulb or CONSULT each time repair is ®nished. If malfunction is still observed, proceed to the next step. When mal-
function is eliminated, further repair work is not required.
MRS054AB
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
SRS Operation Check (Cont'd)
RS-31
