NISSAN PICK-UP 1999 Repair Manual

Schematic
HRS048
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
RS-2019

Wiring Diagram Ð SRS Ð/LHD Models
HRS049
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
RS-2020

HRS050
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
Wiring Diagram Ð SRS Ð/LHD Models
(Cont'd)
RS-2021

HRS051
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
Wiring Diagram Ð SRS Ð/LHD Models
(Cont'd)
RS-2022

Wiring Diagram Ð SRS Ð/RHD Models
HRS052
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
RS-2023

HRS053
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
Wiring Diagram Ð SRS Ð/RHD Models
(Cont'd)
RS-2024

Self-diagnosis
DIAGNOSTIC PROCEDURE 1 (without CONSULT)
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 is malfunction-
ing and needs to be
repaired as indicated.Go to DIAGNOSTIC PRO-
CEDURE 2, or 3 (RS-2026
or 2029).
MRS097A
Air bag is deployed. Go to COLLISION DIAG-
NOSIS (RS-2039).
Air bag fuse, diagnosis
sensor unit or harness is
malfunctioning and needs
to be repaired.Go to DIAGNOSTIC PRO-
CEDURE 9 (RS-2037).
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-2037).
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
3 (step 4), RS-2029.
SRS168
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
RS-2025

DIAGNOSTIC PROCEDURE 2 (with CONSULT)
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]''.
SRS733
SRS046
SRS074
SRS047
SRS048
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
Self-diagnosis (Cont'd)
RS-2026

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