NISSAN PICK-UP 1998 Repair Manual

SRS Operation Check
DIAGNOSTIC PROCEDURE 1
Checking SRS operation by using ``AIR BAG'' warning lamp
Ð User mode
1. After turning ignition switch from ``OFF'' to ``ON'', ``AIR BAG''
warning lamp operates.
2. Compare ``AIR BAG'' warning lamp operation to the chart
below.
``AIR BAG'' warning lamp operation Ð User mode Ð SRS condition Reference item
MRS095A
No malfunction is
detected.
No further action is neces-
sary.
Ð
MRS096A
The system has problem
and needs to be repaired
as indicated.Go to DIAGNOSTIC PRO-
CEDURE 2 or 6 (RS-29 or
37).
MRS097A
Air bag is deployed. Go to COLLISION DIAG-
NOSIS (RS-42).
Air bag fuse, diagnosis
sensor unit or harness is
malfunctioning and needs
to be repaired.Go to DIAGNOSTIC PRO-
CEDURE 9 (RS-40).
MRS098A
One of the following has
occurred and needs to be
repaired.
lMeter fuse is blown.l``AIR BAG'' warning
lamp circuit has short.
lDiagnosis sensor unit is
malfunctioning.Go to DIAGNOSTIC PRO-
CEDURE 10 (RS-41).
NOTE:
If ``AIR BAG'' warning lamp operates differently from the
operations shown above, refer to ``AIR BAG'' warning lamp
operation Ð Diagnosis mode Ð, DIAGNOSTIC PROCEDURE
6 (step 4), RS-37.
SRS405
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS) Ð
4WD models
RS-28

Trouble Diagnoses with CONSULT
DIAGNOSTIC PROCEDURE 2
Inspecting SRS malfunctioning parts by using CONSULT Ð
Diagnosis mode
1. Turn ignition switch ``OFF''.
2. Connect ``CONSULT'' to Data link connector.
3. Turn ignition switch ``ON''.
4. Touch ``START''.
5. Touch ``AIRBAG''.
6. Touch ``SELF-DIAG [CURRENT]''.
7. Diagnostic codes are displayed on ``SELF-DIAG [CUR-
RENT]''.
SEF056U
SRS046
MRS125A
SRS047
SRS048
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS) Ð
4WD models
RS-29

If no self-diagnostic failure is detected on ``SELF-DIAG [CUR-
RENT]'' even though malfunction is detected in DIAGNOSTIC
PROCEDURE 1, check the battery voltage. If the battery voltage
is less than 9V, charge the battery. Then go to DIAGNOSTIC
PROCEDURE 3, page RS-31. If the battery voltage is OK, go to
DIAGNOSTIC PROCEDURE 4, page RS-33, to diagnose the
following situations:
lDiagnosis results (previously stored in the memory) might not
be erased after repair.
lThe SRS system malfunctions intermittently.
8. Touch ``PRINT''.
9. Compare diagnostic codes to the CONSULT DIAGNOSTIC
CODE CHART, page RS-30.
10. Touch ``BACK'' key of CONSULT until SELECT SYSTEM
appears in order to return to User mode from Diagnosis
mode, then turn off CONSULT.
11. Turn ignition switch ``OFF'', then disconnect CONSULT and
both battery cables.
12. Repair the system as outlined by the ``Repair order'' in CON-
SULT DIAGNOSTIC CODE CHART, that corresponds to the
problem code. For replacement procedure of component
parts, refer to RS-10.
13. After repairing the system, go to DIAGNOSTIC PROCE-
DURE 3 for final checking, page RS-31.
CONSULT DIAGNOSTIC CODE CHART (``SELF-DIAG [CURRENT]'')
Diagnostic item Explanation/Possible causesRepair order
Recheck SRS at each replace-
ment.
NO SELF DIAGNOSTIC
FAILURE INDICATED.When malfunction is indi-
cated by the ``AIR BAG''
warning lamp in User
mode.
lSelf-diagnostic failure ``SELF-
DIAG [PAST]'' (previously stored
in the memory) might not be
erased after repair.
lIntermittent problem has been
detected in the past.
lGo to DIAGNOSTIC PROCE-
DURE 4 (RS-33).
lNo malfunction is detected.lGo to DIAGNOSTIC PROCE-
DURE 3 (RS-31).
AIRBAG MODULE
[OPEN]
lDriver's air bag module circuit is open. (including the spiral
cable)1. Visually check the wiring harness
connection.
2. Replace the harness if it has vis-
ible damage.
3. Replace driver's air bag module.
(Before disposal of it, it must be
deployed.)
4. Replace the spiral cable.
5. Replace the diagnosis sensor
unit. AIRBAG MODULE
[VB-SHORT]
lDriver's air bag module circuit is shorted to some power sup-
ply circuit. (including the spiral cable)
AIRBAG MODULE
[GND-SHORT]
lDriver's air bag module circuit is shorted to ground. (including
the spiral cable)
AIRBAG MODULE
[SHORT]
lDriver's air bag module circuits are shorted to each other.
CONTROL UNIT
lDiagnosis sensor unit is out of order. 1. Visually check the wiring harness
connections.
2. Replace the diagnosis sensor
unit.
* Follow the procedures in numerical order when repairing malfunctioning parts. Confirm whether malfunction is eliminated
using the air bag warning lamp or CONSULT each time repair is finished. If malfunction is still observed, proceed to the
next step. When malfunction is eliminated, further repair work is not required.
SRS049
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS) Ð
4WD models
Trouble Diagnoses with CONSULT (Cont'd)
RS-30

DIAGNOSTIC PROCEDURE 3
Final checking after repairing SRS by using CONSULT Ð
Diagnosis mode
1. After repairing SRS, connect both battery cables.
2. Connect CONSULT to Data link connector.
3. Turn ignition switch from ``OFF'' to ``ON''.
4. Touch ``START''.
5. Touch ``AIRBAG''.
6. Touch ``SELF-DIAG [CURRENT]''.
7. If no malfunction is detected on ``SELF-DIAG [CURRENT]'',
repair of SRS is completed.
If any problem code is displayed on ``SELF-DIAG
[CURRENT]'', the malfunctioning part is not repaired com-
pletely or another malfunctioning part is detected. Go to
DIAGNOSTIC PROCEDURE 2, page RS-29, and repair mal-
functioning part completely.
SEF056U
SRS046
MRS125A
SRS047
SRS049
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS) Ð
4WD models
Trouble Diagnoses with CONSULT (Cont'd)
RS-31

8. Touch ``ERASE''.
NOTE:
Touch ``ERASE'' to clear the memory of the malfunction
(SELF-DIAG [PAST]).
If the memory of the malfunction is ``SELF-DIAG [PAST]'' is
not erased, the User mode shows the system malfunction by
the operation of the warning lamp even if the malfunction is
repaired completely.
9. Touch ``BACK'' key of CONSULT to select ``SELF-DIAG
[PAST]'' in the ``SELECT DIAG MODE'' screen. Touch
``SELF-DIAG [PAST]''.
10. Check that no self-diagnostic failure is detected on ``SELF-
DIAG [PAST]''.
11. Touch ``BACK'' key of CONSULT until SELECT SYSTEM
appears in order to return to User mode from Diagnosis
mode, turn off CONSULT, then disconnect CONSULT.
12. Turn ignition switch ``OFF''.
13. Go to DIAGNOSTIC PROCEDURE 1, page RS-28 to check
SRS operation by using ``AIR BAG'' warning lamp with User
mode.
SRS357
SRS050
SRS062
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS) Ð
4WD models
Trouble Diagnoses with CONSULT (Cont'd)
RS-32

DIAGNOSTIC PROCEDURE 4 (Continued from
DIAGNOSTIC PROCEDURE 2)
Inspecting SRS malfunctioning record
Is it the first time for maintenance of
SRS?
Yes
cNo
``SELF-DIAG [PAST]''
(previously entered) might
not be erased after repair.
Go to DIAGNOSTIC PRO-
CEDURE 3, step 8 (RS-
31).
GO TO DIAGNOSTIC PROCEDURE 5
(RS-34).
.
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS) Ð
4WD models
Trouble Diagnoses with CONSULT (Cont'd)
RS-33

DIAGNOSTIC PROCEDURE 5
Inspecting SRS intermittent problem by using CONSULT Ð
Diagnosis mode
1. Turn ignition switch ``OFF''.
2. Connect ``CONSULT'' to Data link connector.
3. Turn ignition switch ``ON''.
4. Touch ``START''.
5. Touch ``AIRBAG''.
6. Touch ``SELF-DIAG [PAST]''.
7. If diagnostic codes are displayed on ``SELF-DIAG [PAST]'',
go to step 10.
SEF056U
SRS046
MRS125A
SRS050
SRS054
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS) Ð
4WD models
Trouble Diagnoses with CONSULT (Cont'd)
RS-34

If no self-diagnostic failure is detected on ``SELF-DIAG [PAST]'',
touch ``BACK'' and go back to ``SELECT DIAG MODE''.
8. Touch ``TROUBLE DIAG RECORD''.
NOTE:
With TROUBLE DIAG RECORD, diagnosis results previ-
ously erased by a reset operation can be displayed.
9. Diagnostic code is displayed on ``TROUBLE DIAG
RECORD''.
10. Touch ``PRINT''.
11. Compare diagnostic codes to the INTERMITTENT PROB-
LEM DIAGNOSTIC CODE CHART, page RS-36.
12. Touch ``BACK'' key of CONSULT until SELECT SYSTEM
appears, then turn off CONSULT.
13. Turn ignition switch ``OFF'', then disconnect CONSULT and
both battery cables.
14. Repair the system as outlined by the ``Repair order'' in
INTERMITTENT PROBLEM DIAGNOSTIC CODE CHART,
that corresponds to the problem code. For replacement pro-
cedure of component parts, refer to RS-10.
15. Go to DIAGNOSTIC PROCEDURE 3, page RS-31, for final
checking.
SRS062
SRS055
SRS315
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS) Ð
4WD models
Trouble Diagnoses with CONSULT (Cont'd)
RS-35

INTERMITTENT PROBLEM DIAGNOSTIC CODE CHART (``SELF-DIAG [PAST]'' or
``TROUBLE DIAG RECORD'')
Diagnostic item Explanation Repair order
NO SELF DIAGNOSTIC
FAILURE INDICATED.
lNo malfunction is detected.lGo to DIAGNOSTIC PROCEDURE 3 (RS-31)
after charging battery.
AIRBAG MODULE
[OPEN]
lDriver's air bag module circuit is open.
(including the spiral cable)lVisually check the wiring harness connection.
lReplace the harness if it has visible damage.
lReplace driver's air bag module.
(Before disposal of it, it must be deployed.)
lReplace the spiral cable.
lReplace the diagnosis sensor unit. AIRBAG MODULE
[VB-SHORT]
lDriver's air bag module circuit is shorted to
some power supply circuit. (including the spi-
ral cable)
AIRBAG MODULE
[GND-SHORT]
lDriver's air bag module circuit is shorted to
ground. (including the spiral cable)
AIRBAG MODULE
[SHORT]
lDriver's air bag module circuits are shorted to
each other.
CONTROL UNIT
lDiagnosis sensor unit is out of order.lVisually check the wiring harness connection.
lReplace the diagnosis sensor unit.
* Intermittent problem areas cannot be easily located. For this reason, perform the procedures outlined under the repair order, then
make the final system check.
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS) Ð
4WD models
Trouble Diagnoses with CONSULT (Cont'd)
RS-36

Trouble Diagnoses without CONSULT
DIAGNOSTIC PROCEDURE 6
Inspecting SRS malfunctioning parts by using ``AIR BAG''
warning lamp Ð Diagnosis mode
NOTE:
SRS will not enter Diagnosis mode if no malfunction is
detected in User mode.
1. Open driver's door.
2. Turn ignition switch from ``OFF'' to ``ON''.
3. Press driver's door switch at least 5 times within 7 seconds
after turning ignition switch ``ON''.
SRS is now in Diagnosis mode.
4. ``AIR BAG'' warning lamp operates in Diagnosis mode as
follows:
NOTE:
If SRS does not enter Diagnosis mode even though malfunc-
tion is detected in User mode, go to DIAGNOSTIC PROCE-
DURE 11, page RS-41.
No. ``AIR BAG'' warning lamp flash pattern Ð Diagnosis mode Ð SRS condition
1
SRS333
VathroughVbare repeated.lDiagnosis
results (previ-
ously stored in
the memory)
might not be
erased after
repair.
lIntermittent
problem has
been detected
in the past.
Go to DIAGNOS-
TIC PROCEDURE
8 (RS-40).
2
SRS341
VathroughVdare repeated.
VbÐ Driver and passenger
air bag marker (For
identifying driver and/or
passenger air bag mal-
functioning)
VdÐ Indicates malfunction-
ing part. The number
of flash varies with
malfunctioning part
(0.5 sec. ON and 0.5
sec. OFF is counted as
one flash.)The system has a
problem and
needs to be
repaired.
5. Malfunctioning part is indicated by the number of flashes
(part
VdorVf). Compare the number of flashes to AIR BAG
WARNING LAMP FLASH CODE CHART, page RS-38, and
locate malfunctioning part.
6.
Turn ignition switch ``OFF'', and disconnect both battery cables.
7. Repair the system as outlined by the ``Repair order'' in AIR
BAG WARNING LAMP FLASH CODE CHART that corre-
sponds to the flash code. For replacement procedure of com-
ponent parts, refer to RS-10.
8. After repairing the system, go to DIAGNOSTIC PROCE-
DURE 7, page RS-38.
SRS406
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS) Ð
4WD models
RS-37