2001 INFINITI QX4 battery replacement

Diagnosis Sensor Unit
REMOVAL AND INSTALLATIONNBRS0012CAUTION:
IBefore servicing SRS, turn the ignition switch off, discon-
nect both battery cables and wait for at least 3 minutes.
IThe 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.
ICheck diagnosis sensor unit for proper installation.
ICheck diagnosis sensor unit to ensure it is free of
deformities, dents, cracks or rust. If they show any visible
signs of damage, replace them with new ones.
ICheck diagnosis sensor unit brackets to ensure they are
free of deformities or rust.
IReplace diagnosis sensor unit if it has been dropped or
sustained an impact.
IAfter replacement of diagnosis sensor unit, perform self-
diagnosis for SRS. Refer to ªSRS Operation Checkº for
details (RS-38).
SRS636-A
1. Disconnect connectors for driver and passenger air bag mod-
ules and seat belt pre-tensioner.
2. Remove console box. Refer to BT-21, ªINSTRUMENT PANEL
ASSEMBLYº.
3. Disconnect diagnosis sensor unit connector.
4. Remove ground bolt and also remove special bolts using the
TAMPER RESISTANT TORX (Size T50), from diagnosis sen-
sor unit.
Then remove the diagnosis sensor unit.
NOTE:
ITo install, reverse the removal procedure sequence.
SRS651-C
Seat Belt Pre-tensioner
REMOVAL AND INSTALLATIONNBRS0034CAUTION:
IBefore servicing SRS, turn the ignition switch off, discon-
nect both battery cables and wait at least 3 minutes.
ICheck seat belt pre-tensioner with load limiter for proper
installation.
IAfter replacement of seat belt pre-tensioner, check SRS
function and perform self-diagnosis for SRS. Refer to
ªSRS Operation Checkº for details. (RS-38)
IDo not attempt to disassemble seat belt pre-tensioner with
load limiter.
IReplace seat belt pre-tensioner if it has been dropped or
sustained an impact.
IDo not expose seat belt pre-tensioner to temperatures
exceeding 80ÉC (176ÉF).
For removal of seat belt pre-tensioner, refer to ªFront Seat Beltº for
details. (RS-4)
NOTE:
ITo install, reverse the removal procedure sequence.
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Diagnosis Sensor Unit
RS-15

Satellite Sensor
REMOVAL AND INSTALLATIONNBRS0035CAUTION:
IBefore servicing SRS, turn the ignition switch off, discon-
nect both battery cables and wait at least 3 minutes.
IDo not use old bolts coated with bonding agent after
removal; replace with new ones.
ICheck satellite sensor for proper installation.
ICheck satellite sensor to ensure they are free of
deformities, dents, cracks or rust. If it shows any visible
signs of damage, replace it with new one.
IAfter replacement of satellite sensor, check SRS function
and perform self-diagnosis for SRS. Refer to ªSRS Opera-
tion Checkº for details. (RS-38)
IDo not attempt to disassemble satellite sensor.
IReplace satellite sensor if it has been dropped or sus-
tained an impact.
SRS642-A
1. Remove seat belt pre-tensioner with load limiter. Refer to
ªFront Seat Beltº for details. (RS-4)
2. Disconnect satellite sensor connector.
3. Remove bolt and nuts from satellite sensor unit.
Then remove the satellite sensor.
NOTE:
ITo install, reverse the removal procedure sequence.
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Satellite Sensor
RS-16

SRS701
If no malfunction is detected on ªSELF-DIAG [CURRENT]º even
though malfunction is detected in ªSRS Operation Checkº, check
the battery voltage.
If the battery voltage is less than 9V, charge the battery. Then go
to DIAGNOSTIC PROCEDURE 3, page RS-42.
If the battery voltage is OK, go to DIAGNOSTIC PROCEDURE 4,
page RS-44, to diagnose the following cases:
ISelf-diagnostic result ªSELF-DIAG [PAST]º (previously stored
in the memory) might not be erased after repair.
IThe SRS system malfunctions intermittently.
8. Touch ªPRINTº.
9. Compare diagnostic codes to ªCONSULT-II Diagnostic Code
Chartº, page RS-40.
10. Touch ªBACKº key of CONSULT-II until ªSELECT SYSTEMº
appears in order to return to User mode from Diagnosis mode.
11. Turn ignition switch ªOFFº, then turn off and disconnect
CONSULT-II, and disconnect 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-15.
13. After repairing the system, go to DIAGNOSTIC PROCEDURE
3, page RS-42 for final checking.
CONSULT-II Diagnostic Code Chart (ªSELF-DIAG
[CURRENT]º)
NBRS0045S0101
Diagnostic item ExplanationRepair order
ªRecheck SRS at each replace-
ment.º
NO DTC IS
DETECTED.When malfunction is
indicated by the ªAIR
BAGº warning lamp in
User modeILow battery voltage (Less than 9V)IGo to DIAGNOSTIC PROCEDURE 3
(RS-42) after charging battery.
ISelf-diagnostic result ªSELF-DIAG
[PAST]º (previously stored in the
memory) might not be erased after
repair.
IIntermittent malfunction has been
detected in the past.IGo to DIAGNOSTIC PROCEDURE 4
(RS-44).
INo malfunction is detected.IGo to DIAGNOSTIC PROCEDURE 3
(RS-42).
AIRBAG MODULE
[OPEN]IDriver'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 disposal of it, it must be
deployed.)
4. Replace the spiral cable.
5. Replace the diagnosis sensor unit.
6. Replace the related harness.
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Trouble Diagnoses with CONSULT-II (Cont'd)
RS-40

SRS704
9. Diagnostic code is displayed on ªTROUBLE DIAG RECORDº.
10. Touch ªPRINTº.
11. Compare diagnostic codes to ªIntermittent Malfunction Diag-
nostic Code Chartº, page RS-46.
12. Touch ªBACKº key of CONSULT-II until ªSELECT SYSTEMº
appears.
13. Turn ignition switch ªOFFº, then turn off and disconnect
CONSULT-II, and disconnect both battery cables.
14. Repair the system as outlined by the ªRepair orderº in ªInter-
mittent Malfunction Diagnostic Code Chartº, that corresponds
to the self-diagnostic result. For replacement procedure of
component parts, refer to RS-15.
15. Go to DIAGNOSTIC PROCEDURE 3, page RS-42, for final
checking.
Intermittent Malfunction Diagnostic Code Chart (ªSELF-
DIAG [PAST]º or ªTROUBLE DIAG RECORDº)
NBRS0045S0401
Diagnostic item Explanation Repair order
NO DTC IS
DETECTED.When malfunction is
indicated by the ªAIR
BAGº warning lamp in
User modeILow battery voltage (Less than 9V)IGo to DIAGNOSTIC PROCEDURE
3 (RS-42) after charging battery.
INo malfunction is detected.IGo to DIAGNOSTIC PROCEDURE
3 (RS-42).
AIRBAG MODULE
[OPEN]IDriver'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]IDriver's air bag module circuit is shorted to some power sup-
ply circuit. (including the spiral cable)
AIRBAG MODULE
[GND-SHORT]IDriver's air bag module circuit is shorted to ground. (including
the spiral cable)
AIRBAG MODULE
[SHORT]IDriver's air bag module circuits are shorted to each other.
ASSIST A/B MODULE
[VB-SHORT]IFront 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]IFront passenger air bag module circuit is open.
ASSIST A/B MODULE
[GND-SHORT]IFront passenger air bag module circuit is shorted to ground.
ASSIST A/B MODULE
[SHORT]IFront passenger air bag module circuits are shorted to each
other.
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Trouble Diagnoses with CONSULT-II (Cont'd)
RS-46

No. ªAIR BAGº warning lamp flash pattern Ð Diagnosis mode Ð SRS condition
1
SRS333
athroughbare repeated.IDiagnosis
results (pre-
viously
stored in the
memory)
might not be
erased after
repair.
IIntermittent
malfunction
has been
detected in
the past.
Go to DIAG-
NOSTIC PRO-
CEDURE 8
(RS-55).
2
SRS341
athroughdare repeated.
bÐ Driver and passenger
air bag and seat belt pre-ten-
sioner marker (For identifying
driver air bag, passenger air
bag and/or seat belt pre-ten-
sioners malfunctioning)
dÐ Indicates malfunctioning
part. The number of flash var-
ies with malfunctioning part
(0.5 sec. ON and 0.5 sec.
OFF is counted as one flash.)The system is
malfunctioning
and needs to
be repaired.
3
SRS342-A
athroughfare repeated.
b,c,dÐ Side air bag
marker (For identifying side
air bag malfunctioning)
fÐ Indicates malfunctioning
part. The number of flash var-
ies with malfunctioning part
(0.5 sec. ON and 0.5 sec.
OFF is counted as one flash.)
7. Malfunctioning part is indicated by the number of flashes (part
dorf). Compare the number of flashes to ªAir Bag Warning
Lamp Flash Code Chartº, page RS-50, and locate malfunction-
ing part.
8. Turn ignition switch ªOFFº, and disconnect both battery cables.
9. Repair the system as outlined by the ªRepair orderº in ªWarn-
ing Lamp Flash Code Chartº that corresponds to the flash
code. For replacement procedure of component parts, refer to
RS-15.
10. After repairing the system, go to DIAGNOSTIC PROCEDURE
7, page RS-53.
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Trouble Diagnoses without CONSULT-II (Cont'd)
RS-49

The satellite sensor (LH)
is malfunctioning.
(f: 4 flashes)Flash pattern
SRS339-A
athroughfare repeated.
fÐ Four flashes indi-
cate malfunctioning sat-
ellite sensor (LH) circuit.
Repair order (ªRecheck SRS at each replacement.º)
1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace the satellite sensor (LH).
4. Replace the diagnosis sensor unit.
5. 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-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.
SRS800
DIAGNOSTIC PROCEDURE 7NBRS0046S02Final checking after repairing SRS by using ªAIR BAGº 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 ªOFFº to ªONº.
4. ªAIR BAGº warning lamp operates in Diagnosis mode as fol-
lows:
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Trouble Diagnoses without CONSULT-II (Cont'd)
RS-53