1999 NISSAN PICK-UP battery replacement

lRemove air bag module from steering wheel, instrument
panel or seat back. Check harness cover and connectors for
damage, terminals for deformities, and harness for binding.
lInstall driver air bag module to steering wheel to check fit or
alignment with the wheel.
lCheck steering wheel for excessive free play.
lInstall passenger air bag module to instrument panel to
check fit or alignment with the instrument panel.
(3) Spiral cable
lCheck spiral cable for dents, cracks, or deformities.
lCheck connectors and protective tape for damage.
lCheck steering wheel for noise, binding or heavy operation.
(4) Main harness and air bag harness
lCheck connectors for poor connections, damage, and termi-
nals for deformities.
lCheck harnesses for binding, chafing or cut.
CAUTION:
Replace previously used special bolts and ground bolt with
new ones.
Removal and Installation Ð Diagnosis
Sensor Unit
CAUTION:
lBefore servicing SRS, turn the ignition switch off, disconnect both battery cables and wait at least
3 minutes.
lDo not use old special bolts and nuts coated with bonding agent after removal; replace with new
ones.
lCheck diagnosis sensor unit for proper installation.
lCheck diagnosis sensor unit to ensure it is free of deformities, dents, cracks or rust. If it shows
any visible signs of damage, replace it with a new one.
lCheck diagnosis sensor unit brackets to ensure they are free of deformities and rust.
lAfter replacement of diagnosis sensor unit, check SRS function and perform self-diagnosis for
SRS. Refer to ``Self-diagnosis'' for details. (RS-2025)
lDo not attempt to disassemble diagnosis sensor unit.
lReplace diagnosis sensor unit and if it has been dropped or sustained an impact.
REMOVAL OF DIAGNOSIS SENSOR UNIT
1. Disconnect driver and passenger air bag module connectors.
2. Remove instrument panel. Refer to ``INSTRUMENT PANEL''
in BT section.
3. Remove air duct.
4. Disconnect diagnosis sensor unit connector.
5. Remove ground bolt and also remove special bolts using the
TAMPER RESISTANT TORX (Size T50), from diagnosis
sensor unit.
Then remove the diagnosis sensor unit.
NOTE:
lTo install, reverse the removal procedure sequence.
lAfter replacement, perform self-diagnosis for SRS. Refer
to ``Self-diagnosis'' for details (RS-2025).
CAUTION:
lDo not use old special bolts and ground bolt coated with
bonding agent; replace with new coated special bolts
and ground bolt.
SRS729
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Maintenance Items (Cont'd)
RS-2007

If no malfunction is detected on ``SELF-DIAG [CURRENT]'' even
though malfunction is detected by the ``AIR BAG'' warning lamp,
check the battery voltage.
If the battery voltage is less than 9V, charge the battery. Then
go to DIAGNOSTIC PROCEDURE 4 for final checking, page
RS-2030.
If the battery voltage is OK, go to DIAGNOSTIC PROCEDURE
6, page RS-2034, to diagnose the following situations:
lSelf-diagnostic result (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-2028.
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
self-diagnostic result. For replacement procedure of compo-
nent parts, refer to RS-2007.
13. After repairing the system, go to DIAGNOSTIC PROCE-
DURE 4 for final checking, page RS-2030.SRS049
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
Self-diagnosis (Cont'd)
RS-2027

CONSULT DIAGNOSTIC CODE CHART (``SELF-DIAG [CURRENT]'')
Diagnostic item ExplanationRepair order
Recheck SRS at each
replacement.
NO SELF DIAGNOSTIC
FAILURE INDICATEDWhen malfunction is indicated
by the ``AIR BAG'' warning lamp
in User mode
lLow battery voltage (Less
than 9V)lGo to DIAGNOSTIC PROCE-
DURE 4 (RS-2030) after
charging battery.
lSelf-diagnostic result ``SELF-
DIAG [PAST]'' (previously
stored in the memory) might
not be erased after repair.
lIntemittent malfunction has
been detected in the past.
lGo to DIAGNOSTIC PROCE-
DURE 6 (RS-2034).
lNo malfunction is detected.lGo to DIAGNOSTIC PROCE-
DURE 4 (RS-2030).
AIRBAG MODULE
[OPEN]
lDriver's air bag module circuit is open. (including the spiral cable) 1. Visually check the wiring har-
ness connection.
2. Replace the harness if it has
visible damage.
3. Replace the spiral cable.
4. Replace driver's air bag mod-
ule.
(Before disposal of it, it must
be deployed.)
5. Replace the diagnosis sensor
unit.
6. Replace the related harness. AIRBAG MODULE
[VB-SHORT]
lDriver's air bag module circuit is shorted to some power supply
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.
ASSIST A/B MODULE
[VB-SHORT]
lFront passenger air bag module circuit is shorted to some power
supply circuit.1. Visually check the wiring har-
ness connection.
2. Replace the harness if it has
visible damage.
3. Replace front passenger air
bag module.
(Before disposal of it, it must
be deployed.)
4. Replace the diagnosis sensor
unit.
5. Replace the related harness. ASSIST A/B MODULE
[OPEN]
lFront passenger air bag module circuit is open.
ASSIST A/B MODULE
[GND-SHORT]
lFront passenger air bag module circuit is shorted to ground.
ASSIST A/B MODULE
[SHORT]
lFront passenger air bag module circuits are shorted to each
other.
CONTROL UNIT
lDiagnosis sensor unit is malfunctioning. 1. Visually check the wiring har-
ness connections.
2. Replace the harness if it has
visible damage.
3. Replace the diagnosis sensor
unit.
4. Replace the related harness.
* 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.
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
Self-diagnosis (Cont'd)
RS-2028

DIAGNOSTIC PROCEDURE 3 (without CONSULT)
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-2038.
No. ``AIR BAG'' warning lamp flash pattern Ð Diagnosis mode Ð SRS condition
1
SRS333
V0athroughV0bare repeated.lDiagnosis
results (previ-
ously stored
in the
memory)
might not be
erased after
repair.
lIntermittent
malfunction
has been
detected in
the past.
Go to DIAG-
NOSTIC PRO-
CEDURE 7 (RS-
2034).
2
SRS341
V0athroughV0dare repeated.
V0bÐ Driver and passenger air bag
marker (For identifying driver
and/or passenger air bag mal-
functioning)
V0dÐ Indicates malfunctioning 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 is
malfunctioning
and needs to be
repaired.
5. Malfunctioning part is indicated by the number of flashes
(part
V0d). Compare the number of flashes to AIR BAG
WARNING LAMP FLASH CODE CHART, page RS-2030,
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-2007.
8. After repairing the system, go to DIAGNOSTIC PROCE-
DURE 5, page RS-2032.
SRS170
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
Self-diagnosis (Cont'd)
RS-2029

AIR BAG WARNING LAMP FLASH CODE CHART (DIAGNOSIS MODE)
Warning
lampFlash codeV0d
(# of flashes)ExplanationRepair order
``Recheck SRS at each replacement.''
``AIR BAG'' warning lamp
0lDiagnosis results (previously stored in the
memory) might not be erased after repair.
lIntermittent malfunction has been detected in
the past.Go to DIAGNOSTIC PROCEDURE 7 (RS-2034).
2 The driver's air bag module circuit is malfunction-
ing.1. Visually check the wiring harness connections.
2. Replace the harness if it has visible damage.
3. Replace the spiral cable.
4. Replace the driver's air bag module.
(Before disposing of it, it must be deployed.)
5. Replace the diagnosis sensor unit.
6. Replace the related harness.
7 The diagnosis sensor unit is malfunctioning. 1. Visually check the wiring harness connections.
2. Replace the harness if it has visible damage.
3. Replace the diagnosis sensor unit.
4. Replace the related harness.
8 The front passenger air bag module circuit is
malfunctioning.1. Visually check the wiring harness connections.
2. Replace the harness if it has visible damage.
3. Replace the front passenger air bag module.
(Before disposing of it, it must be deployed.)
4. Replace the diagnosis sensor unit.
5. Replace the related harness.
* 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.
DIAGNOSTIC PROCEDURE 4 (with CONSULT)
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''.
SRS733
SRS046
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
Self-diagnosis (Cont'd)
RS-2030

9. Diagnostic code is displayed on ``TROUBLE DIAG
RECORD''.
10. Touch ``PRINT''.
11. Compare diagnostic codes to the INTERMITTENT MAL-
FUNCTION DIAGNOSTIC CODE CHART, page RS-2036.
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 MALFUNCTION DIAGNOSTIC CODE
CHART, that corresponds to the self-diagnosis result. For
replacement procedure of component parts, refer to
RS-2007.
15. Go to DIAGNOSTIC PROCEDURE 4, page RS-2030.
INTERMITTENT MALFUNCTION DIAGNOSTIC CODE CHART (``SELF-DIAG [PAST]'' or
``TROUBLE DIAG RECORD'')
Diagnostic item Explanation Repair order
NO SELF DIAGNOSTIC
FAILURE INDICATED.When malfunction is
indicated by the ``AIR
BAG'' warning lamp in
User mode
lLow battery voltage
(Less than 9V)lGo to DIAGNOSTIC PROCEDURE 4 (RS-
2030) after charging battery.
lNo malfunction is detected.lGo to DIAGNOSTIC PROCEDURE 4 (RS-
2030).
AIRBAG MODULE
[OPEN]
lDriver's air bag module circuit is open. (includ-
ing the spiral cable)1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. If the harness check is OK, replace the spiral
cable, diagnosis sensor unit and driver air
bag module. (Before disposing the driver air
bag module, it must be deployed.) 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.
ASSIST A/B MODULE
[VB-SHORT]
lFront passenger air bag module circuit is
shorted to some power supply circuit.1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. If the harness check is OK, replace the diag-
nosis sensor unit and passenger air bag
module. (Before disposing the passenger air
bag module, it must be deployed.) ASSIST A/B MODULE
[OPEN]
lFront passenger air bag module circuit is
open.
ASSIST A/B MODULE
[GND-SHORT]
lFront passenger air bag module circuit is
shorted to ground.
ASSIST A/B MODULE
[SHORT]
lFront passenger air bag module circuits are
shorted to each other.
CONTROL UNIT
lDiagnosis sensor unit is malfunctioning. 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. If the harness check is OK, replace the diag-
nosis sensor unit.
* Follow the procedures in numerical order when repairing malfunctioning parts, then make the final system check.
SRS056
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
Self-diagnosis (Cont'd)
RS-2036