sensor 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

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

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

AIR BAG WARNING LAMP FLASH CODE CHART (DIAGNOSIS MODE)
Warning
lampFlash codeVd(# of flashes)ExplanationRepair order
Recheck SRS at each replacement.
``AIR BAG'' warning lamp
0lSelf-diagnostic failure might not be erased after
repair.
lIntermittent problem has been detected in the
past.Go to DIAGNOSTIC PROCEDURE 8 (RS-40).
2 The driver's air bag module circuit is out of order. 1. Visually check the wiring harness connections.
2. Replace the spiral cable.
3. Replace the driver's air bag module.
(Before disposing of it, it must be deployed.)
4. Replace the diagnosis sensor unit.
5. Replace the air bag harness.
7 The diagnosis 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 (in User mode) 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 7
Final checking after repairing SRS by using ``AIR BAG''
warning lamp Ð Diagnosis mode and User mode
1. After repairing SRS connect both battery cables.
2. Open driver's door.
3. Turn ignition switch from ``OFF'' to ``ON''.
4. ``AIR BAG'' warning lamp operates in Diagnosis mode as
follows:
No. ``AIR BAG'' warning lamp flash pattern Ð Diagnosis mode Ð SRS condition
1
SRS333
VathroughVbare repeated. No malfunc-
tion is
detected or
repair is com-
pleted.
No further
action is nec-
essary.
2
SRS341
VathroughVdare repeated.
VbÐ Driver and passenger air
bag marker (For identifying
driver and/or passenger air
bag malfunctioning)
VdÐ Indicates malfunctioning
part. The number of
flashes varies with mal-
functioning 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.
NOTE:
When diagnosis sensor unit is replaced with new one, ``AIR
BAG'' warning lamp will operate in User mode. Checking
``AIR BAG'' warning lamp operation in Diagnosis mode is
not required. Go to step 6.
SRS406
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS) Ð
4WD models
Trouble Diagnoses without CONSULT
(Cont'd)
RS-38

5. If ``AIR BAG'' warning lamp operates as shown in No. 1 in
chart above, turn ignition switch ``OFF'' to reset from Diag-
nosis mode to User mode and to erase the memory of the
malfunction. Then go to step 6.
If ``AIR BAG'' warning lamp operates as shown in No. 2 or
No. 3 in chart above, the malfunctioning part is not repaired
completely, or another malfunctioning part is detected. Go to
DIAGNOSTIC PROCEDURE 6, page RS-37, and repair mal-
functioning part completely.
6. Turn ignition switch ``ON''. ``AIR BAG'' warning lamp operates
in User mode. Compare ``AIR BAG'' warning lamp operation
to the chart below.
NOTE:
If switching Diagnosis mode to User mode is required while
malfunction is being detected, turn ignition switch from
``OFF'' to ``ON''. Then press driver's door switch at least 5
times within 7 seconds after turning ignition switch ``ON''.
SRS is now in User mode.
``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 open or
short.
lDiagnosis sensor unit is
malfunctioning.Go to DIAGNOSTIC PRO-
CEDURE 10 (RS-41).
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS) Ð
4WD models
Trouble Diagnoses without CONSULT
(Cont'd)
RS-39

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

Trouble Diagnoses: Air Bag Warning Lamp
Does Not Turn ON
DIAGNOSTIC PROCEDURE 10
Is warning lamp fuse OK?
YescNo
Replace fuse.
Is warning lamp LED OK?
YescNo
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
Check the ground circuit of
``AIR BAG'' warning lamp.
Replace diagnosis sensor unit.
Trouble Diagnoses: SRS Does Not Enter
Diagnosis Mode Using Door Switch
DIAGNOSTIC PROCEDURE 11
Disconnect both battery cables and check
battery voltage using circuit tester.
lIs battery voltage more than 9V?
Yes
cNo
Charge battery.
Check harness continuity between driver's
door switch connector terminal
V2and
body ground.
lDoes continuity exist?
Yes
cNo
Replace driver's door
switch. If SRS still does not
enter Diagnosis mode,
replace or repair harness.
Replace diagnosis sensor unit.
Go to DIAGNOSTIC PROCEDURE 1
(RS-28).
SRS317
SRS263
SRS550
.
.
.
.
.
.
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS) Ð
4WD models
RS-41

FOR FRONTAL COLLISION
To repair the SRS for a frontal collision, perform the following steps.
When SRS is activated in a collision:
V1Replace the diagnosis sensor unit.
V2Remove the air bag module.
V3Check the SRS components using the table shown below:
lReplace any SRS components showing visible signs of damage (dents, cracks, deformation).
V4Install new air bag module.
V5Conduct self-diagnosis using CONSULT, and ``AIR BAG'' warning lamp. Refer to ``Self-diagnosis'' for
details (RS-28). Ensure entire SRS operates properly.
When SRS is not activated in a collision:
V1Check the SRS components using the table shown below:
lReplace any SRS components showing visible signs of damage (dents, cracks, deformation).
V2Conduct self-diagnosis using CONSULT, and ``AIR BAG'' warning lamp. Refer to ``Self-diagnosis'' for
details (RS-28). Ensure entire SRS operates properly.
SRS inspection
Part SRS is activated SRS is NOT activated
Air bag module 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. Install driver air bag module into the steering wheel to check fit and alignment
with the wheel.
3. No damage found, reinstall with new bolts.
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.
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.
6. If damagedÐREPLACE.
Spiral cable 1. Visually check spiral cable and combination switch for damage.
2. Check connectors, lead wires and protective tape for damage.
3. Check steering wheel for noise, binding or heavy operation.
4. If no damage is found, reinstall it.
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.
COLLISION DIAGNOSIS Ð 4WD models
RS-42

Precautions
lWhen installing rubber parts, final tightening must be
carried out under unladen condition* with tires on
ground.
*: Fuel, radiator coolant and engine oil full. Spare tire,
jack, hand tools and mats in designated positions.
lUse flare nut wrench when removing or installing brake
tubes.
lAfter installing removed suspension parts, check wheel
alignment and adjust if necessary.
lAlways torque brake lines when installing.
Special Service Tools
Tool number
Tool nameDescription
KV40101000
Axle stand
NT159
Removing rear axle shaft
ST36230000
Sliding hammer
NT126
Removing rear axle shaft
ST38020000
Bearing lock nut wrench
NT160
Removing wheel bearing lock nut
KV40106500
Rear axle shaft bearing
puller
NT683
Removing wheel bearing and ABS sensor rotor
ST37840000
Rear axle shaft guide
NT162
Installing rear axle shaft
GG94310000
Flare nut torque
wrench
NT406
Removing and installing brake piping
a: 10 mm (0.39 in)
SBR820BA
PRECAUTIONS AND PREPARATION
RA-1

Removal
lBefore removing the rear axle, disconnect the ABS
wheel sensor from the assembly. Then move it away
from the axle. Failure to do so may result in damage to
the sensor wires and the sensor becoming inoperative.
lWheel bearing does not require maintenance.
lIf growling noise is emitted from wheel bearing during
operation, replace wheel bearing assembly.
lIf the wheel bearing assembly is removed, it must be
renewed. The old assembly must not be re-used.
1. Disconnect parking brake cable and brake tube.
2. Remove nuts securing wheel bearing cage with baffle plate.
3. Draw out axle shaft with Tool.
When drawing out axle shaft, be careful not to damage oil
seal.
4. Remove case shim and case seal.
Ð 2WD and 4WD models without ABS Ð
5. Remove O-ring. Ð 4WD models with ABS Ð
6. Remove oil seal.
Do not reuse oil seal once it is removed.
Always install new one.
7. Remove ABS sensor rotor. Ð 4WD models with ABS Ð
8. Unbend lock washer with a screwdriver.
SRA002
SRA003-A
SRA799A
SRA104
REAR AXLE
RA-6