1999 NISSAN PICK-UP Repair Manual

5. Touch ``AIRBAG''.
6. Touch ``SELF-DIAG [PAST]''.
7. If diagnostic codes are displayed on ``SELF-DIAG [PAST]'',
go to step 10.
If no malfunction 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.
SRS074
SRS050
SRS054
SRS062
SRS055
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
Self-diagnosis (Cont'd)
RS-2035

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

Trouble Diagnoses for Air Bag Warning
Lamp
DIAGNOSTIC PROCEDURE 9
SYMPTOM: ``AIR BAG'' warning lamp does not turn off.
Is air bag module deployed?
No
cYes
Replace air bag module
and diagnosis sensor unit.
Refer to COLLISION
DIAGNOSIS, (RS-2039).
Is SRS ``AIR BAG'' fuse OK?
Yes
cNo
Replace fuse and turn
ignition switch ON. If SRS
``AIR BAG'' fuse is blown
again, repair related har-
ness.
Connect CONSULT and touch
``START''.
lIs ``AIRBAG'' displayed on
CONSULT?
Yes
cNo
Replace diagnosis 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.
DIAGNOSTIC PROCEDURE 10
SYMPTOM: ``AIR BAG'' warning lamp does not turn on.
Is meter fuse OK?
Yes
cNo
Replace fuse and turn
ignition switch ON. If
meter fuse is blown again,
repair related harness.
Is warning lamp LED OK?
Yes
cNo
Replace warning lamp
LED.
1. Disconnect diagnosis sensor unit con-
nector.
2. Turn the ignition key to ON position.
lDoes warning lamp turn on?
Yes
cNo
Connect warning lamp and
diagnosis sensor unit con-
nector properly. If warning
lamp still does not come
on, replace harness.
Replace diagnosis sensor unit.
SRS734
SRS543
SRS745
.
.
.
.
.
.
.
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
RS-2037

DIAGNOSTIC PROCEDURE 11 (Models for Europe
and with multi-remote control system)
SYMPTOM: SRS does not enter Diagnostic mode.
Disconnect both battery cables and check
battery voltage using circuit tester.
lIs battery voltage more than 9V?
Yes
cNo
Charge battery.
Remove driver's door switch and check
continuity between driver's door switch
connector terminals
V01andV03under the
following conditions.
Yes
cNo
Replace driver's door
switch.
Check harness continuity between driver's
door switch connector terminal
V03and
body ground.
lDoes continuity exist?
Yes
cNo
Replace or repair harness.
Replace diagnosis sensor unit.
Go to DIAGNOSTIC PROCEDURE 1
(RS-2025).
Condition Continuity
Door switch is depressed
(Door is closed).NO
Door switch is released
(Door is open).YES
SRS058
SRS736
SRS737
.
.
.
.
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
Trouble Diagnoses for Air Bag Warning
Lamp (Cont'd)
RS-2038

FOR FRONTAL COLLISION
To repair the SRS for a frontal collision, perform the following steps.
When SRS is activated in a collision:
V01Replace the diagnosis sensor unit.
V02Remove the air bag modules.
V03Check the SRS components using the table shown below:
lReplace any SRS components showing visible signs of damage (dents, cracks, deformation).
V04Install new air bag modules.
V05Conduct self-diagnosis using CONSULT, and ``AIR BAG'' warning lamp. Refer to ``Self-diagnosis'' for
details (RS-2025). Ensure entire SRS operates properly.
When SRS is not activated in a collision:
V01Check the SRS components using the table shown below:
lReplace any SRS components showing visible signs of damage (dents, cracks, deformation).
V02Conduct self-diagnosis using CONSULT, and ``AIR BAG'' warning lamp. Refer to ``Self-diagnosis'' for
details (RS-2025). Ensure entire SRS operates properly.
SRS inspection
Part SRS is activated SRS is NOT activated
Air bag module
(driver and passen-
ger side)REPLACE
Install air bag mod-
ule with new bolts.1. Remove air bag module. Check harness cover and connectors for damage, ter-
minals for deformities, and harness for binding.
2-1. Install driver air bag module into the steering wheel to check fit and alignment
with the wheel.
2-2. Install passenger air bag module into the instrument panel to check fit with the
instrument panel.
3. No damage found, reinstall with new bolts coated with bonding agent.
4. If damagedÐREPLACE. Air bag must be deployed before discarding.
Diagnosis sensor
unitREPLACE
Install diagnosis sen-
sor unit with new
bolts.1. Check case and bracket for dents, cracks or deformities.
2. Check connectors for damage, and terminals for deformities.
3. If no damage is found, reinstall with new bolts.
4. If damagedÐREPLACE. Install diagnosis sensor unit with new bolts coated with
bonding agent.
Steering wheel 1. Visually check steering wheel for deformities.
2. Check harness (built into steering wheel) and connectors for damage, and terminals for deformities.
3. Install air bag module to check fit or alignment with steering wheel.
4. Check steering wheel for excessive free play.
5. If no damage is found, reinstall the steering wheel.
6. If damagedÐREPLACE.
Spiral cable 1. Visually check spiral cable and combination switch for damage.
2. Check connectors, flat cable and protective tape for damage.
3. Check steering wheel for noise, binding or heavy operation.
4. If no damage is found, reinstall the spiral cable.
5. If damagedÐREPLACE.
Harness and Con-
nectors1. Check connectors for poor connection, damage, and terminals for deformities.
2. Check harness for binding, chafing, cuts, or deformities.
3. If no damage is found, reinstall harness and connectors.
4. DamagedÐREPLACE damaged section of harness. Do not attempt to repair, splice or modify any SRS
harness.
Instrument panel Refer to the table on the next page.
COLLISION DIAGNOSIS
RS-2039

Part Side is activated SRS is NOT activated
Instrument panel 1. When passenger air bag inflates, check the following points for bending, deformities or cracks.
lOpening portion for passenger air bag
SRS738
lPassenger air bag module brackets
SRS739
lThe portions securing the instrument panel
SRS740
2. If no damage is found, reinstall the instrument panel.
3. If damagedÐREPLACE the instrument panel with bolts.
COLLISION DIAGNOSIS
RS-2040

STEERINGSYSTEM
SECTION
ST
MODIFICATION NOTICE:
Steering column has been changed.
CONTENTS
STEERING WHEEL AND STEERING
COLUMN .............................................................. 2002
Disassembly and Assembly ............................. 2002 SERVICE DATA AND SPECIFICATIONS
(SDS)
.................................................................... 2004
Inspection and Adjustment .............................. 2004
ST

Disassembly and Assembly
lWhen disassembling and assembling, unlock steering lock
with key.
lRemove combination switch.
lInstall lock nut on steering column shaft and tighten the nut.
lSteering lock
a. Break self-shear type screws using a drill or other appropri-
ate tool.
NST046
..Lock nut.25 - 34 (2.5 - 3.5, 18 - 25)
.Lock nut
...25-34
(2.5 - 3.5, 18 - 25)
.
SST490C
SST741A
STEERING WHEEL AND STEERING COLUMN
ST-2002