1998 NISSAN PICK-UP airbag

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

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

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

DIAGNOSTIC PROCEDURE 8 (Continued from
DIAGNOSTIC PROCEDURE 6)
Inspecting SRS malfunctioning record
Is it the first time for maintenance of
SRS?
Yes
cNo
Diagnosis results (previ-
ously stored in the
memory) might not be
erased after repair.
Go to DIAGNOSTIC
PROCEDURE 7, step 5
(RS-38).
GO TO DIAGNOSTIC PROCEDURE 5
(RS-34). (Further inspection cannot be
performed without using CONSULT.)
Trouble Diagnoses: Air Bag Warning Lamp
Does Not Turn OFF
DIAGNOSTIC PROCEDURE 9
Is air bag deployed?
No
cYes
Refer to COLLISION
DIAGNOSIS (RS-42).
Is SRS ``Air Bag'' fuse OK?
Yes
cNo
Replace fuse.
Connect CONSULT and touch
``START''.
lIs ``AIRBAG'' displayed on
CONSULT?
Yes
cNo
Visually check the wiring
harness connection of
diagnosis sensor unit. If
the harness connection
checks OK, replace diag-
nosis sensor unit.
Is harness connection between warning
lamp and diagnosis sensor unit OK?
Yes
cNo
Connect warning lamp and
diagnosis sensor unit con-
nector properly. If warning
lamp still does not go off,
replace harness.
Replace diagnosis sensor unit.
SRS316
MRS125A
.
.
.
.
.
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS) Ð
4WD models
Trouble Diagnoses without CONSULT
(Cont'd)
RS-40