1999 NISSAN PRIMERA sensor

CAUTION:
Replace previously used special bolts, ground bolt and nuts
coated with bonding agent and also the anchor bolt with
new ones.
Removal and Installation Ð Diagnosis
Sensor Unit, Seat Belt Pre-tensioner and
Satellite Sensor
CAUTION:
lBefore servicing SRS, turn the ignition switch ªOFFº, disconnect both battery cables and wait at
least 3 minutes.
lThe special bolts are coated with bonding agent while the other bolt is for ground. Do not use
old bolts after removal; replace with new ones.
lCheck diagnosis sensor unit, seat belt pre-tensioner and satellite sensor for proper installation.
lCheck diagnosis sensor unit and satellite sensor to ensure they are free of deformities, dents,
cracks or rust. If it shows any visible signs of damage, replace them with new ones.
lCheck diagnosis sensor unit brackets to ensure they are free of deformities and rust.
lAfter replacement of diagnosis sensor unit, seat belt pre-tensioner and satellite sensor check
SRS function and perform self-diagnosis for SRS. Refer to ªSRS Operation Checkº for details.
(RS-37)
lDo not attempt to disassemble diagosis sensor unit,seat belt pre-tensioner and satellite sensor
lReplace diagnosis sensor unit, seat belt pre-tensioner and satellite sensor if it has been dropped
or sustained an impact.
lDo not expose seat belt pre-tensioner to temperatures exceeding 80ÉC (176ÉF).
REMOVAL OF DIAGNOSIS SENSOR UNIT
1. Disconnect driver's, passenger's- and side air bag module
connectors. Also, disconnect seat belt pre-tensioner connec-
tor.
2. Remove lower instrument center panel. Refer to ªINSTRU-
MENT PANELº in BT section.
3. Disconnect diagnosis sensor unit connector.
4. Remove ground bolt and the special bolts by using the
TAMPER RESISTANT TORX (Size T50), from diagnosis sen-
sor unit.
Then remove the diagnosis sensor unit.
NOTE:
lTo install, reverse the removal procedure sequence.
lDiagnosis sensor unit must always be installed with
their arrow marks ª
Sº pointing towards the front of the
vehicle for proper installation.
REMOVAL OF SEAT BELT PRE-TENSIONER
For removal of seat belt pre-tensioner, refer to ªFront Seat Beltº
for details. (RS-3)
NOTE:
lTo install, reverse the removal procedure sequence.
NRS061
Diagnosis sensor unit
.Forward mark
Ground
bolt
FRONTSpecial bolt15-25N´m
(1.5 - 2.5 kg-m, 11 - 18 ft-lb)
NRS062
.5.1 - 6.3 N´m
(0.52 - 0.64 kg-m,
45 - 56 in-lb)
.Seat belt
pre-tensioner
.Connector.Anchor bolt43-55N´m
(4.4 - 5.6 kg-m,
32 - 41 ft-lb)
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
RS-13

REMOVAL SATELLITE SENSOR
1. Remove seat belt pre-tensioner. Refer to ªFront Seat Beltº for
details. (RS-3)
2. Disconnect satellite sensor connector.
3. Remove bolt and nuts from satellite sensor unit. Then
remove the satellite sensor.
NOTE:
lTo install, reverse the removal procedure sequence.
Removal Ð Air Bag Module and Spiral Cable
NRS126
7-13
(0.8 - 1.3,
62 - 115)
14.5 - 24.5
(1.5 - 2.5,
11 - 18)
.Ground bolt2.94 - 4.9
(0.30 - 0.50,
26 - 43)
: N´m (kg-m, ft-lb)
: N´m (kg-m, in-lb)Connector
NRS123 Side lid RH
(where fitted) Audio steering switch
(where fitted)
Side lid RH
29-39N´m
(3.0 - 4.0 kg-m, 22 - 29 ft-lb) Spiral
cable
Combination switch
Side lid LHSpecial bolt
7.8 - 13.7 N´m (0.8 - 1.4 kg-m, 69 - 121 in-lb)Lower lid
SEC. 253×484
Air bag module Special bolt
7.8 - 13.7 N´m (0.8 - 1.4 kg-m, 69 - 121 in-lb)
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Removal and Installation Ð Diagnosis
Sensor Unit, Seat Belt Pre-tensioner and
Satellite Sensor (Cont'd)
RS-14

Trouble Diagnoses Introduction
CAUTION:
lDo not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. Spiral cable and SRS wiring harnesses (except ªSEAT BELT PRE-TENSIONER
CONNECTORº) can be identified by yellow harness connector (and with yellow harness protec-
tor or yellow insulation tape before the harness connectors.
lDo not attempt to repair, splice or modify the SRS wiring harness. If the harness is damaged,
replace it with a new one.
lKeep ground portion clean.
DIAGNOSIS FUNCTION
The SRS self-diagnosis results can be read by using ªAIR BAGº warning lamp and/or CONSULT-II. The
reading of these results is accomplished using one of two modes Ð ªUser modeº and ªDiagnosis modeº.
The User mode is exclusively prepared for the customer (driver). This mode warns the driver of a system
malfunction through the operation of the ªAIR BAGº warning lamp.
The Diagnosis mode allows the technician to locate and inspect the malfunctioning part.
The mode applications for the ªAIR BAGº warning lamp and CONSULT-II are as follows:
User mode Diagnosis mode Display type
ªAIR BAGº warning lamp X XON-OFF operation
CONSULT-II Ð XMonitoring
lSeat belt pre-tensioner system can only be diagnosed by CONSULT-II.
DIAGNOSIS MODE FOR CONSULT-II
lSELF-DIAG [CURRENT]
A current Self-diagnosis result (also indicated by the number of warning lamp flashes in the Diagnosis
mode) is displayed on the CONSULT-II screen in real time. This refers to a malfunctioning part requir-
ing repairs.
lSELF-DIAG [PAST]
Diagnosis results previously stored in the memory (also indicated by the warning lamp flashes in the
Diagnosis mode) are displayed on the CONSULT-II screen. The stored results are not erased until
memory erasing is executed.
lTROUBLE DIAG RECORD
With TROUBLE DIAG RECORD, diagnosis results previously erased by a reset operation can be dis-
played on the CONSULT-II screen.
lªECU DISCRIMINATED NO.º
The diagnosis sensor unit for each vehicle model is assigned with its own, individual classification num-
ber (refer to the table below). This number will be displayed on the CONSULT-II screen. When replac-
ing the diagnosis sensor unit, refer to the part number for the compatibility. After installation, replace-
ment with a correct unit can be checked by confirming this classification number on the CONSULT-II
screen.
For NISSAN MODEL P11, the diagnosis sensor unit classification numbers are as follows:
MODEL ECU DISCRIMINATED NO.
Models with single air bag and seat belt pre-tensioner A914
Models with dual air bags and seat belt pre-tensioner A915
Models with dual air bags, side air bag and seat belt pre-tensioner A916
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
RS-28

YRS049
DIAGNOSIS
SENSOR UNIT
SPIRAL
CABLE
AIR BAG MODULE
(DRIVER'S SIDE)AIR BAG MODULE
(PASSENGER'S SIDE)
: With dual air bag
: This connector is not shown in ªHARNESS LAYOUTº of EL section.
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
Wiring Diagram Ð SRS Ð (Cont'd)
RS-34

SRS-Operation Check
DIAGNOSTIC PROCEDURE 1
Checking Air Bag Operation by using ªAIR BAGº Warning
Lamp Ð User mode
1. After turning ignition switch from ªOFFº to ªONº, ªAIR BAGº
warning lamp operates.
2. Compare ªAIR BAGº warning lamp operation to the chart
below.
NOTE:
If ªAIR BAGº warning lamp operates differently from the
operations shown above, refer to ªAIR BAGº warning lamp
operation Ð Diagnosis mode Ð, DIAGNOSTIC PROCEDURE
6 (step 4), RS-48.
SRS800
ªAIR BAGº warning lamp operation Ð User mode Ð SRS condition Reference item
MRS095A
No malfunction is
detected. No further
action is necessary.
Ð
MRS096A
The system is malfunc-
tioning and needs to be
repaired as indicated.Go to DIAGNOSTIC
PROCEDURE 2, or 6
(RS-38 or 48 ).
MRS097A
Air bag or/and seat belt
pre-tensioner is
deployed.Go to COLLISION DIAG-
NOSIS (RS-57).
Air bag fuse, diagnosis
sensor unit or harness is
malfuncitoning and
needs to be repaired.Go to DIAGNOSTIC
PROCEDURE 9 (RS-56).
MRS098A
One of the following has
occurred and needs to
be repaired.
lMeter fuse is blown.lªAIR BAGº warning
lamp circuit has open
or short.
lDiagnosis sensor unit
is malfunctioning.Go to DIAGNOSTIC
PROCEDURE 10 (RS-
56).
IGN ON
ON
OFF7 sec.
IGN ON
ON
OFF
0.5 sec. 0.5 sec.
IGN ON
ON
OFF
IGN ON
ON
OFF
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
RS-37

If no malfunction is detected on ªSELF-DIAG [CURRENT]º but
malfunction is indicated by the ªAIR BAGº, warning lamp, go to
DIAGNOSTIC PROCEDURE 4, page RS-43, to diagnose the
following situations:
lSelf-diagnostic result ªSELF-DIAG [PAST]º (previously
stored in the memory) might not be erased after repair.
lThe SRS system malfunctions intermittently.
8. Touch ªPRINTº.
9. Compare diagnostic codes to ªCONSULT-II Diagnostic Code
Chartº, page RS-39.
10. Touch ªBACKº key of CONSULT-II until ªSELECT SYSTEM º
appears in order to return to User mode from Diagnosis
mode.
11. Turn ignition switch ªOFFº, then turn off and disconnect CON-
SULT-II and both battery cables.
12. Repair the system as outlined by the ªRepair orderº in ªCON-
SULT-II Diagnostic Code Chartº, that corresponds to the self-
diagnostic result. For replacement procedure of component
parts, refer to RS-13.
13. After repairing the system, go to DIAGNOSTIC PROCE-
DURE 3, page RS-42 for final checking.
CONSULT-II Diagnostic Code Chart
(ªSELF-DIAGNOSISº)
Diagnostic item ExplanationRepair order
Recheck SRS at each
replacement.
NO DTC IS DETECTED. When malfunction is indi-
cated by the ªAIR BAGº
warning lamp in User mode
lLow battery voltage (Less
than 9V).lGo to DIAGNOSTIC PRO-
CEDURE 3 (RS-42) after
charging battery.
lSelf-diagnostic result
ªSELF-DIAG [PAST]º (pre-
viously stored in the
memory) might not be
erased after repair.
lIntermittent malfunction has
been detected in the past.Go to DIAGNOSTIC PROCE-
DURE 4 (RS-43).
No malfunction is detected.
lGo to DIAGNOSTIC PRO-
CEDURE 3 (RS-42).
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 visible damage.
3. Replace driver's air bag
module.
(Before disposing of it, it
must be deployed.)
4. Replace the spiral cable.
5. Replace the diagnosis
sensor unit.
6. Replace the related har-
ness.
C2SDC02
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
Trouble Diagnoses with CONSULT-II
(Cont'd)
RS-39

Diagnostic item ExplanationRepair order
Recheck SRS at each
replacement.
AIRBAG MODULE
[VB-SHORT]
lDriver's air bag module circuit is shorted to a power supply
circuit. (including the spiral cable)1. Visually check the wiring
harness connection.
2. Replace the harness if it
has visible damage.
3. Replace the spriral cable.
4. Replace driver's air bag
module.
(Before disposing of it, it
must be deployed.)
5. Replace the diagnosis
sensor unit.
6. Replace the related har-
ness. AIRBAG MODULE
[GND-SHORT]
lDriver's air bag module circuit is shorted to ground. (includ-
ing the spiral cable)
AIRBAG MODULE
[SHORT]
lDriver's air bag module circuits are shorted to each other.
ASSIST A/B MODULE
[VB/SHORT]
lPassenger's 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 passenger's air
bag module. (Before dis-
posal of it, it must be
deployed.)
4. Replace the diagnosis
sensor unit.
5. Replace the related har-
ness. ASSIST A/B MODULE
[OPEN]
lPassenger's air bag module circuit is open.
ASSIST A/B MODULE
[GND-SHORT]
lPassenger's air bag module circuit is shorted to ground.
ASSIST A/B MODULE
[SHORT]
lPassenger's air bag module circuits are shorted to each
other.
SIDE MODULE LH
[OPEN]
lSide air bag module (LH) circuit is open. 1. Visually check the wiring
harness connection.
2. Replace the harness if it
has visible damage.
3. Replace the side air bag
module (LH). (Before
disposal, it must be
deployed.)
4. Replace the diagnosis
sensor unit.
5. Replace the related har-
ness. SIDE MODULE LH
[VB-SHORT]
lSide air bag module (LH) circuit is shorted to some power
supply circuits.
SIDE MODULE LH
[GND-SHORT]
lSide air bag module (LH) circuit is shorted to ground.
SIDE MODULE LH
[SHORT]
lSide air bag module (LH) circuits are shorted to each other.
SIDE MODULE RH
[OPEN]
lSide air bag module (RH) circuit is open. 1. Visually check the wiring
harness connection.
2. Replace the harness if it
has visible damage.
3. Replace the side air bag
module (RH). (Before
disposal, it must be
deployed.)
4. Replace the diagnosis
sensor unit.
5. Replace the related har-
ness. SIDE MODULE RH
[VB-SHORT]
lSide air bag module (RH) circuit is shorted to some power
supply circuits.
SIDE MODULE RH
[GND-SHORT]
lSide air bag module (RH) circuit is shorted to ground.
SIDE MODULE RH
[SHORT]
lSide air bag module (RH) circuits are shorted to each
other.
SATELLITE SENS LH
[UNIT FAIL]
SATELLITE SENS LH
[COMM FAIL]
lSatellite sensor (LH) 1. Visually check the wiring
harness connection.
2. Replace the harness if it
has visible damage.
3. Replace the satellite sen-
sor (LH).
4. Replace the diagnosis
sensor unit.
5. Replace the related har-
ness.
TROUBLE DIAGNOSES Ð Supplemental Restraint System (SRS)
Trouble Diagnoses with CONSULT-II
(Cont'd)
RS-40

Diagnostic item ExplanationRepair order
Recheck SRS at each
replacement.
SATELLITE SENS RH
[UNIT FAIL]
SATELLITE SENS RH
[COMM FAIL]
lSatellite sensor (RH) 1. Visually check the wiring
harness connection.
2. Replace the harness if it
has visible damage.
3. Replace the satellite sen-
sor (RH).
4. Replace the diagnosis
sensor unit.
5. Replace the related har-
ness.
PRE-TEN LH
[OPEN/VB-SHORT]
lThe circuit for LH 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 LH seat belt.
(Before disposing, it must
be deactivated.)
4. Replace the diagnosis
sensor unit
5. Replace the related har-
ness. PRE-TEN LH
[GND-SHORT]
lThe circuit for LH pre-tensioner is shorted to ground.
PRE-TEN RH
[OPEN/VB-SHORT]
lThe circuit for RH 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 RH seat belt.
(Before disposing, it must
be deactivated.)
4. Replace the diagnosis
sensor unit
5. Replace the related har-
ness. PRE-TEN RH
[GND-SHORT]
lThe circuit for RH pre-tensioner is shorted to ground.
CONTROL UNIT
lLow battery voltage or diagnosis sensor unit is out of order. 1. Charge battery.
2. Visually check wiring har-
ness connections.
3. Replace diagnosis sensor
unit.
CONTROL UNIT
lLow battery voltage (Less than 9V)lGo to DIAGNOSTIC PRO-
CEDURE 3 (RS-42) to after
charging battery.
lDiagnosis sensor unit is malfunctioning. 1. Visually check wiring har-
ness connections.
2. Replace the harness if it
has visible damage.
3. Replace diagnosis sensor
unit.
4. Replace the related har-
ness.
* Follow the procedures in numerical order when repairing malfunctioning parts. Confirm whether malfunction is eliminated
using the air bag warning lamp or CONSULT-II 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)
Trouble Diagnoses with CONSULT-II
(Cont'd)
RS-41