1998 NISSAN PATROL sensor

If no self-diagnostic failure is detected on ``SELF-DIAG [CUR-
RENT]'' even though malfunction is detected in SRS Operation
Check (User mode), check the battery voltage. If the battery volt-
age is less than 9V, charge the battery. Then go to DIAGNOSTIC
PROCEDURE 3, page RS-34. If the battery voltage is OK, go to
DIAGNOSTIC PROCEDURE 4, page RS-36, to diagnose the fol-
lowing cases:
+Self-diagnostic failure ``SELF-DIAG [PAST]'' (previously stored
in the memory) might not be erased after repair.
+The SRS system malfunctions intermittently.
8. Touch ``PRINT''.
9. Compare diagnostic codes to ``CONSULT DIAGNOSTIC CODE
CHART'', page RS-33.
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-12.
13. After repairing the system, go to DIAGNOSTIC PROCEDURE
3, page RS-34 for ®nal checking.
CONSULT can only show one seat belt pre-tensioner malfunc-
tion as self-diagnosis result at a time. Check self-diagnosis
result with CONSULT whether other malfunctions are detected
after repairing one seat belt pre-tensioner malfunction.
CONSULT DIAGNOSTIC CODE CHART (``SELF-DIAG
[CURRENT]'')
Diagnostic item ExplanationRepair order
``Recheck SRS at each replacement.''
NO SELF DIAGNOSTIC
FAILURE INDICATED.When malfunction is
indicated by the ``AIR
BAG'' warning lamp in
User mode+Low battery voltage
(Less than 9V)+Go to DIAGNOSTIC PROCEDURE 3 (RS-34)
after charging battery.
+Self-diagnostic fail-
ure ``SELF-DIAG
[PAST]'' (previously
stored in the
memory) might not
be erased after
repair.
+Intermittent problem
has been detected
in the past.+Go to DIAGNOSTIC PROCEDURE 4 (RS-36).
+No malfunction is detected.+Go to DIAGNOSTIC PROCEDURE 3 (RS-34).
AIRBAG MODULE
[OPEN]+Driver'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 visible damage.
3. Replace the spiral cable.
4. Replace driver's air bag module. (Before disposal
of it, it must be deployed.)
5. Replace the diagnosis sensor unit.
6. Replace the harness. AIRBAG MODULE
[VB-SHORT]+Driver's air bag module circuit is shorted to
some power supply circuit. (including the spi-
ral cable)
AIRBAG MODULE
[GND-SHORT]+Driver's air bag module circuit is shorted to
ground. (including the spiral cable)
AIRBAG MODULE
[SHORT]+Driver's air bag module circuits are shorted to
each other.
SRS049
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
Trouble Diagnoses with CONSULT (Cont'd)
RS-33

Diagnostic item ExplanationRepair order
``Recheck SRS at each replacement.''
ASSIST A/B MODULE
[VB-SHORT]+Front 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. Replace front passenger air bag module. (Before
disposal of it, it must be deployed.)
4. Replace the diagnosis sensor unit.
5. Replace the harness. ASSIST A/B MODULE
[OPEN]+Front passenger air bag module circuit is
open.
ASSIST A/B MODULE
[GND-SHORT]+Front passenger air bag module circuit is
shorted to ground.
ASSIST A/B MODULE
[SHORT]+Front passenger air bag module circuits are
shorted to each other.
DRIVE PRE-TENSIONER
[OPEN/VB-SHORT]+The circuit for the driver's pre-tensioner is
open or shorted to some power supply circuit.1. Visually check the wiring harness connections.
2. Replace the harness if it has visible damage.
3. Replace the driver's seat belt.
(Before disposing, it must be deactivated.)
4. Replace the diagnosis sensor unit.
5. Replace the harness. DRIVE PRE-TENSIONER
[GND-SHORT]+The circuit for the driver's pre-tensioner is
shorted to ground.
ASSIST
PRE-TENSIONER
[OPEN/VB-SHORT]+The circuit for the front passenger pre-ten-
sioner is open or shorted to some power sup-
ply circuit.1. Visually check the wiring harness connections.
2. Replace the harness if it has visible damage.
3. Replace the front passenger seat belt.
(Before disposing, it must be deactivated.)
4. Replace the diagnosis sensor unit.
5. Replace the harness. ASSIST
PRE-TENSIONER
[GND-SHORT]+The circuit for the front passenger pre-ten-
sioner is shorted to ground.
CONTROL UNIT+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 harness.
* Follow the procedures in numerical order when repairing malfunctioning parts. Con®rm whether malfunction is eliminated
using the air bag warning lamp or CONSULT each time repair is ®nished. If malfunction is still observed, proceed to the next
step. When malfunction is eliminated, further repair work is not required.
CONSULT can only show one seat belt pre-tensioner malfunction as self-diagnosis result at a time. Check self-diagnosis
result with CONSULT whether other malfunctions are detected after repairing one seat belt pre-tensioner malfunction.
DIAGNOSTIC PROCEDURE 3
Final checking after repairing SRS by using CONSULT Ð Diag-
nosis 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''.
SRS468
SRS046
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
Trouble Diagnoses with CONSULT (Cont'd)
RS-34

9. Diagnostic code is displayed on ``TROUBLE DIAG RECORD''.
10. Touch ``PRINT''.
11. Compare diagnostic codes to ``INTERMITTENT PROBLEM
DIAGNOSTIC CODE CHART'', page RS-38.
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 ``INTER-
MITTENT PROBLEM DIAGNOSTIC CODE CHART'', that cor-
responds to the problem code. For replacement procedure of
component parts, refer to RS-12.
15. Go to DIAGNOSTIC PROCEDURE 3, page RS-34, for ®nal
checking.
INTERMITTENT PROBLEM 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+Low battery voltage
(Less than 9V)+Go to DIAGNOSTIC PROCEDURE 3 (RS-34)
after charging battery.
+No malfunction is detected.+Go to DIAGNOSTIC PROCEDURE 3 (RS-34).
AIRBAG MODULE
[OPEN]+Driver'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 visible damage.
3. If the harness check result is OK, replace driver's
air bag module (Before disposal of it, it must be
deployed.), diagnosis sensor unit and spiral
cable. AIRBAG MODULE
[VB-SHORT]+Driver's air bag module circuit is shorted to
some power supply circuit. (including the spi-
ral cable)
AIRBAG MODULE
[GND-SHORT]+Driver's air bag module circuit is shorted to
ground. (including the spiral cable)
AIRBAG MODULE
[SHORT]+Driver's air bag module circuits are shorted to
each other.
ASSIST A/B MODULE
[VB-SHORT]+Front 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 result is OK, replace front
air bag module (Before disposal of it, it must be
deployed.), and diagnosis sensor unit. ASSIST A/B MODULE
[OPEN]+Front passenger air bag module circuit is
open.
ASSIST A/B MODULE
[GND-SHORT]+Front passenger air bag module circuit is
shorted to ground.
ASSIST A/B MODULE
[SHORT]+Front passenger air bag module circuits are
shorted to each other.
CONTROL UNIT+Diagnosis 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 result is OK, replace diag-
nosis sensor unit.
*Intermittent problem areas cannot be easily located. For this reason, perform the procedures outlined under the repair order, then
make the ®nal system check.
SRS056
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
Trouble Diagnoses with CONSULT (Cont'd)
RS-38

AIR BAG WARNING LAMP FLASH CODE CHART
Warning
lampFlash codejd(# of ¯ashes)ExplanationRepair order
``Recheck SRS at each replacement.''
``AIR BAG'' warning lamp
0+Diagnosis results (previously stored in the
memory) might not be erased after repair.
+Intermittent problem has been detected in the
past.Go to DIAGNOSTIC PROCEDURE 8 (RS-42).
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 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 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 harness.
* Follow the procedures in numerical order when repairing malfunctioning parts. Con®rm whether malfunction is eliminated
using the air bag warning lamp or CONSULT each time repair is ®nished. 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'' warn-
ing 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 fol-
lows:
SRS465
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
Trouble Diagnoses without CONSULT (Cont'd)
RS-40

No. ``AIR BAG'' warning lamp operation Ð Diagnosis mode Ð SRS condition
1
MRS100A
jathroughjbare repeated. No malfunc-
tion is
detected or
repair is com-
pleted.
No further
action is nec-
essary.
2
MRS099A
jathroughjdare repeated.
NOTE:
j
aÐ Interval I
jbÐ Start signal (Start signal
identi®es display modes)
j
cÐ Interval II
jdÐ Indicates malfunctioning
part (0.5 sec. ON and 0.5
sec. OFF is counted as one
¯ash.)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.
5. If ``AIR BAG'' warning lamp operates as shown in No. 1 in chart
above, turn ignition switch ``OFF'' to reset from Diagnosis 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 in chart
above, the malfunctioning part is not repaired completely, or
another malfunctioning part is detected. Go to DIAGNOSTIC
PROCEDURE 6, page RS-39, and repair malfunctioning 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
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
Trouble Diagnoses without CONSULT (Cont'd)
RS-41

``AIR BAG'' warning lamp operation Ð User mode Ð SRS condition Reference item
MRS096A
The system has a problem
and needs to be repaired
as indicated.Go to DIAGNOSTIC PRO-
CEDURE 2 or 6 (RS-32 or
RS-39).
MRS097A
Air bag is deployed. Go to COLLISION DIAG-
NOSIS (RS-45).
Air bag fuse, diagnosis
sensor unit or harness is
malfunctioning and needs
to be repaired.Go to DIAGNOSTIC PRO-
CEDURE 9 (RS-43).
MRS098A
One of the following has
occurred and needs to be
repaired.
+Meter fuse is blown.
+``AIR BAG'' warning
lamp circuit has open or
short.
+Diagnosis sensor unit is
malfunctioning.Go to DIAGNOSTIC PRO-
CEDURE 10 (RS-43).
DIAGNOSTIC PROCEDURE 8 (Continued from
DIAGNOSTIC PROCEDURE 6) (
without CONSULT)
Inspecting SRS malfunctioning record
Is it the ®rst time for maintenance of
SRS?
Ye s
cNo
Diagnosis results (previ-
ously stored in the
memory) might not be
erased after repair.
Go to DIAGNOSTIC PRO-
CEDURE 7, step 5 (RS-
40).
GO TO DIAGNOSTIC PROCEDURE 5
(RS-36).Further inspection cannot be per-
formed without CONSULT.
.
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
Trouble Diagnoses without CONSULT (Cont'd)
RS-42

Trouble Diagnoses: ``AIR BAG'' Warning Lamp
Does Not Turn Off
DIAGNOSTIC PROCEDURE 9
Is air bag deployed?
NocYe s
Refer to COLLISION DIAG-
NOSIS (RS-45).
Is SRS ``Air Bag'' fuse OK?
Ye scNo
Replace fuse.
Connect CONSULT and touch
``START''.
+Is ``AIRBAG'' displayed on
CONSULT?
Ye s
cNo
Visually check the wiring
harness connection of diag-
nosis sensor unit. If the har-
ness connection check is
OK, replace diagnosis sen-
sor unit.
Is harness connection between warning
lamp and diagnosis sensor unit OK?
Ye s
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.
Trouble Diagnoses: ``AIR BAG'' Warning Lamp
Does Not Turn On
DIAGNOSTIC PROCEDURE 10
Is meter fuse OK?
Ye scNo
Replace fuse.
Is warning lamp LED OK?
Ye scNo
Replace warning lamp LED.
1. Disconnect diagnosis sensor unit con-
nector.
2. Turn the ignition key to ON position.
+Does warning lamp turn on?
Ye s
cNo
Check the ground circuit of
``AIR BAG'' warning lamp.
Replace diagnosis sensor unit.
SRS307
SRS180
SRS469
.
.
.
.
.
.
.
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
RS-43

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.
+Is battery voltage more than 9V?
Ye s
cNo
Charge battery.
Remove driver's door switch and check
continuity between driver's door switch
connector terminals
V1andV3under the
following conditions.
Ye s
cNo
Replace driver's door
switch.
Check harness continuity between driver's
door switch connector terminal
V3and
body ground.
+Does continuity exist?
Ye s
cNo
Replace or repair harness.
Replace diagnosis sensor unit.
Go to SRS Operation Check (RS-30).
Condition Continuity
Door switch is depressed
(Door is closed).NO
Door switch is released
(Door is open).YES
SRS263
SRS470
SRS265-D
.
.
.
.
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
RS-44