INFINITI QX4 2001 Factory Service Manual

Diagnostic item ExplanationRepair order
ªRecheck SRS at each replace-
ment.º
PRE-TEN FRONT LH
[OPEN/VB-SHORT]IThe circuit for front 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 front LH seat belt.
(Before disposing, it must be deacti-
vated.)
4. Replace the diagnosis sensor unit.
5. Replace the related harness. PRE-TEN FRONT LH
[GND-SHORT]IThe circuit for front LH pre-tensioner is shorted to ground.
PRE-TEN FRONT RH
[OPEN/VB-SHORT]IThe circuit for front 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 front RH seat belt.
(Before disposing, it must be deacti-
vated.)
4. Replace the diagnosis sensor unit.
5. Replace the related harness. PRE-TEN FRONT RH
[GND-SHORT]IThe circuit for front RH pre-tensioner is shorted to ground.
CONTROL UNITIDiagnosis sensor unit is malfunctioning. 1. Visually check the wiring harness
connection.
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-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.
SRS844
DIAGNOSTIC PROCEDURE 3NBRS0045S02Final checking after repairing SRS by using CONSULT-II Ð
Diagnosis mode
1. After repairing SRS, connect both battery cables.
2. Connect CONSULT-II to Data link connector.
3. Turn ignition switch from ªOFFº to ªONº.
SRS695
4. Touch ªSTARTº.
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Trouble Diagnoses with CONSULT-II (Cont'd)
RS-42

SRS771
5. Touch ªAIR BAGº.
SRS697
6. Touch ªSELF-DIAG [CURRENT]º.
SRS701
7. If no malfunction is detected on ªSELF-DIAG [CURRENT]º,
repair of SRS is completed. Go to step 8.
If any malfunction is displayed on ªSELF-DIAG [CURRENT]º,
the malfunctioning part is not repaired completely or another
malfunctioning part is detected. Go to DIAGNOSTIC PROCE-
DURE 2, page RS-39, and repair malfunctioning part com-
pletely.
SRS773
8. Touch ªERASEº.
NOTE:
Touch ªERASEº to clear the memory of the malfunction
(ªSELF-DIAG [PAST]º).
If the memory of the malfunction in ªSELF-DIAG [PAST]º is not
erased, the User mode shows the system malfunction by the
operation of the warning lamp even if the malfunction is repaired
completely.
SRS697
9. Touch ªBACKº key of CONSULT-II to ªSELECT SYSTEMº
screen. Touch ªSELF-DIAG [PAST]º.
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Trouble Diagnoses with CONSULT-II (Cont'd)
RS-43

SRS702
10. Check that no malfunction is detected on ªSELF-DIAG
[PAST]º.
11. Touch ªBACKº key of CONSULT-II until ªSELECT SYSTEMº
appears in order to return to User mode from Diagnosis mode.
12. Turn ignition switch ªOFFº, then turn off and disconnect CON-
SULT-II.
13. Go to ªSRS Operation Checkº, page RS-38 to check SRS
operation by using ªAIR BAGº warning lamp with User mode.
DIAGNOSTIC PROCEDURE 4 (CONTINUED FROM
DIAGNOSTIC PROCEDURE 2)
NBRS0045S03Inspecting SRS malfunctioning record
1 CONSIDER POSSIBILITY OF NOT ERASING SELF-DIAGNOSTIC RESULT AFTER REPAIRING
Is it the first time for maintenance of SRS?
YesorNo
Ye s©Go to DIAGNOSTIC PROCEDURE 5 (RS-44).
No©Self-diagnostic result ªSELF-DIAG [PAST]º (previously stored in the memory) might not
be erased after repair. Go to DIAGNOSTIC PROCEDURE 3, step 8 (RS-42).
SRS844
DIAGNOSTIC PROCEDURE 5NBRS0045S04Inspecting SRS intermittent malfunction by using CONSULT-II
Ð Diagnosis mode
1. Turn ignition switch ªOFFº.
2. Connect CONSULT-II to Data link connector.
SRS695
3. Turn ignition switch ªONº.
4. Touch ªSTARTº.
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Trouble Diagnoses with CONSULT-II (Cont'd)
RS-44

SRS771
5. Touch ªAIR BAGº.
SRS697
6. Touch ªSELF-DIAG [PAST]º.
SRS700
7. If diagnostic codes are displayed on ªSELF-DIAG [PAST]º, go
to step 10.
SRS702
If no malfunction is detected on ªSELF-DIAG [PAST]º, touch
ªBACKº and go back to ªSELECT DIAG MODEº.
SRS697
8. Touch ªTROUBLE DIAG RECORDº.
NOTE:
With ªTROUBLE DIAG RECORDº, diagnosis results previ-
ously erased by a reset operation can be displayed.
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Trouble Diagnoses with CONSULT-II (Cont'd)
RS-45

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

Diagnostic item Explanation Repair order
SIDE MODULE LH
[OPEN]ISide air bag module (LH) circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. If the harness check is OK, replace
the diagnosis sensor unit and side
air bag module (LH). (Before dis-
posing the side air bag module
(LH), it must be deployed.) SIDE MODULE LH
[VB-SHORT]ISide air bag module (LH) circuit is shorted to some power
supply circuits.
SIDE MODULE LH
[GND-SHORT]ISide air bag module (LH) circuit is shorted to ground.
SIDE MODULE LH
[SHORT]ISide air bag module (LH) circuits are shorted to each other.
SIDE MODULE RH
[OPEN]ISide air bag module (RH) circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. If the harness check is OK, replace
the diagnosis sensor unit and side
air bag module (RH). (Before dis-
posing the side air bag module
(RH), it must be deployed.) SIDE MODULE RH
[VB-SHORT]ISide air bag module (RH) circuit is shorted to some power
supply circuits.
SIDE MODULE RH
[GND-SHORT]ISide air bag module (RH) circuit is shorted to ground.
SIDE MODULE RH
[SHORT]ISide air bag module (RH) circuits are shorted to each other.
SATELLITE SENS LH
[UNIT FAIL]
SATELLITE SENS LH
[COMM FAIL]ISatellite sensor (LH) 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. If the harness check is OK, replace
the diagnosis sensor unit and satel-
lite sensor (LH).
SATELLITE SENS RH
[UNIT FAIL]
SATELLITE SENS RH
[COMM FAIL]ISatellite sensor (RH) 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. If the harness check is OK, replace
the diagnosis sensor unit and satel-
lite sensor (RH).
PRE-TEN FRONT LH
[OPEN/VB-SHORT]IThe circuit for front 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. If the harness check is OK, replace
the diagnosis sensor unit and front
LH seat belt.
(Before disposing the front LH seat
belt pre-tensioner, it must be
deployed.) PRE-TEN FRONT LH
[GND-SHORT]IThe circuit for front LH pre-tensioner is shorted to ground.
PRE-TEN FRONT RH
[OPEN/VB-SHORT]IThe circuit for front 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. If the harness check is OK, replace
the diagnosis sensor unit and front
RH seat belt.
(Before disposing the front RH seat
belt pre-tensioner, it must be
deployed.) PRE-TEN FRONT RH
[GND-SHORT]IThe circuit for front RH pre-tensioner is shorted to ground.
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Trouble Diagnoses with CONSULT-II (Cont'd)
RS-47

Diagnostic item Explanation Repair order
CONTROL UNITIDiagnosis 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 is OK, replace
the diagnosis sensor unit.
* Follow the procedures in numerical order when repairing malfunctioning parts, then make the final system check.
SRS800
Trouble Diagnoses without CONSULT-IINBRS0046DIAGNOSTIC PROCEDURE 6NBRS0046S01Inspecting SRS malfunctioning parts by using ªAIR BAGº
warning lamp Ð Diagnosis mode
NOTE:
SRS will not enter Diagnosis mode if no malfunction is
detected in User mode.
1. Turn ignition switch ªONº.
2. After ªAIR BAGº warning lamp lights for 7 seconds, turn igni-
tion switch ªOFFº within 1 second.
3. Wait more than 3 seconds.
4. Repeat steps 1 to 3 three times.
5. Turn ignition switch ªONº.
SRS is now in Diagnosis mode.
6. ªAIR BAGº warning lamp operates in Diagnosis mode as fol-
lows:
NOTE:
If SRS does not enter Diagnosis mode even though malfunction is
detected in User mode, check the battery voltage.
If the battery voltage is less than 9V, charge the battery. Then go
to DIAGNOSTIC PROCEDURE 7, page RS-53.
If the battery voltage is OK, replace the diagnosis sensor unit.
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Trouble Diagnoses with CONSULT-II (Cont'd)
RS-48

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

Air Bag Warning Lamp Flash Code Chart (Diagnosis
mode)
NBRS0046S0101
IDiagnosis results (pre-
viously stored in the
memory) might not be
erased after repair.
IIntermittent malfunc-
tion has been detected
in the past.Flash pattern
SRS333
athroughbare
repeated.
Repair order
IGo to DIAGNOSTIC PROCEDURE 8 (RS-55).
The front RH seat belt
pre-tensioner circuit is
malfunctioning.
(d: 1 flash)Flash pattern
SRS801
athroughdare
repeated.
dÐ One flash indicates
malfunctioning front RH
pre-tensioner circuit.
Repair order (ªRecheck SRS at each replacement.º)
1. Visually check the wiring harness connections.
2. Replace the harness if it has visible damage.
3. Replace front RH seat belt pre-tensioner.
(Before disposing, it must be deactivated.)
4. Replace the diagnosis sensor unit.
5. Replace the related harness.
The driver's air bag mod-
ule circuit is malfunction-
ing.
(d: 2 flashes)Flash pattern
SRS334
athroughdare
repeated.
dÐ Two flashes indi-
cate malfunctioning driv-
er's air bag module cir-
cuit.
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 spiral cable.
4. Replace driver's air bag module.
(Before disposal, it must be deployed.)
5. Replace the diagnosis sensor unit.
6. Replace the related harness.
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Trouble Diagnoses without CONSULT-II (Cont'd)
RS-50

The front LH seat belt
pre-tensioner circuit is
malfunctioning.
(d: 3 flashes)Flash pattern
SRS802
athroughdare
repeated.
dÐ Three flashes indi-
cate malfunctioning front
LH pre-tensioner circuit.
Repair order (ªRecheck SRS at each replacement.º)
1. Visually check the wiring harness connections.
2. Replace the harness if it has visible damage.
3. Replace front LH seat belt pre-tensioner.
(Before disposing, it must be deactivated.)
4. Replace the diagnosis sensor unit.
5. Replace the related harness.
The diagnosis sensor
unit is malfunctioning.
(d: 7 flashes)Flash pattern
SRS335
athroughdare
repeated.
dÐ Seven flashes indi-
cate malfunctioning diag-
nosis sensor unit.
Repair order (ªRecheck SRS at each replacement.º)
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 related harness.
The front passenger air
bag module circuit is
malfunctioning.
(d: 8 flashes)Flash pattern
SRS336
athroughdare
repeated.
dÐ Eight flashes indi-
cate malfunctioning front
passenger air bag mod-
ule 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 front passenger air bag module.
(Before disposal, it must be deployed.)
4. Replace the diagnosis sensor unit.
5. Replace the related harness.
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Trouble Diagnoses without CONSULT-II (Cont'd)
RS-51