INFINITI QX56 2006 Factory Service Manual

SRS-20
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
HOW TO CHANGE SELF-DIAGNOSIS MODE
HOW TO ERASE SELF-DIAGNOSIS RESULTS
After a malfunction is repaired, turn the ignition switch OFF for at least one second, then back ON. Diagnosis
mode returns to the User mode. At that time, the self-diagnostic result is cleared.
SRS Operation CheckEHS0016S
DIAGNOSTIC PROCEDURE 1
Checking SRS Operation Using “AIR BAG” Warning Lamp—User Mode
1. Turn the ignition switch from OFF to ON, and check that the air bag warning lamp blinks.
2. Compare the SRS air bag warning lamp blinking pattern with the
examples.
SHIA0183E
BF-1845D

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Revision: November 2009 2006 QX56
Warning lamp examples
“AIR BAG ” warning lamp operation-User mode- SRS condition Reference item

No malfunction is detected.

No further action is necessary. —
The system is malfunctioning and
needs to be repaired as indicated. Go to
SRS-22, "
DIAGNOSTIC
PROCEDURE 2" or SRS-38,
"DIAGNOSTIC PROCEDURE 6" .

Air bag is deployed.

Seat belt pre-tensioner is deployed.

Seat belt buckle pre-tensioner
assembly is deployed. Go to
SRS-60, "
COLLISION DIAG-
NOSIS" .

Air bag diagnosis sensor unit is mal-
functioning.

Air bag power supply circuit is mal-
functioning.

SRS air bag warning lamp circuit is
malfunctioning. Go to
SRS-44, "
Trouble Diagnosis:
“AIR BAG” Warning Lamp Does Not
Turn Off" .

Air bag diagnosis sensor unit is mal-
functioning.

Air bag warning lamp circuit is mal-
functioning. Go to
SRS-45, "
Trouble Diagnosis:
“AIR BAG” Warning Lamp Does Not
Turn On" .
SHIA0011E
SHIA0012E
SHIA0013E
SHIA0014E

SRS-22
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
Trouble Diagnosis With CONSULT-IIEHS0016T
DIAGNOSTIC PROCEDURE 2
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunction might be detected
in self-diagnosis depending on control unit which carries out CAN communication.
1. Turn ignition switch OFF.
2. Connect CONSULT-II and CONSULT-II CONVERTER to the
data link connector.
3. Turn ignition switch ON.
4. Touch “START (NISSAN BASED VHCL) ”.
5. Touch “AIR BAG”.
If "AIR BAG" is not indicated, refer to GI-40, "
CONSULT-II Data
Link Connector (DLC) Circuit" .
6. Touch "SELF-DIAG [CURRENT]".
BBIA0369E
BCIA0029E
BCIA0030E
BCIA0031E

TROUBLE DIAGNOSISSRS-23
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Revision: November 2009 2006 QX56
7. Diagnostic code is displayed on "SELF-DIAG [CURRENT]".
If no malfunction is detected on "SELF-DIAG [CURRENT]" even
though malfunction is detected in "SRS Operation Check", refer to
SRS-31, "
DIAGNOSTIC PROCEDURE 4 (CONTINUED FROM
DIAGNOSTIC PROCEDURE 2)" , to diagnose the following cases:

Self-diagnostic result "SELF-DIAG [PAST]" (previously stored in
the memory) might not be erased after repair.

The SRS system malfunctions intermittently.
CONSULT-II Diagnostic Code Chart ("SELF-DIAG [CURRENT]")
WHIA0151E
SRS701
Diagnostic itemExplanation Repair order
Recheck SRS at each replacement
NO DTC IS DETECTED When malfunction is
indicated by the “
AIR
BAG ” warning lamp in
User mode.

Low battery voltage (Less than
9V)
Go to SRS-28, "DIAGNOSTIC PRO-
CEDURE 3" .

Self-diagnostic result “SELF-DIAG
[PAST] ” (previously stored in the
memory) might not be erased
after repair.

Intermittent malfunction has been
detected in the past.

Go to SRS-31, "DIAGNOSTIC PRO-
CEDURE 4 (CONTINUED FROM
DIAGNOSTIC PROCEDURE 2)" .

Go to SRS-31, "DIAGNOSTIC PRO-
CEDURE 5" .

No malfunction is detected. —
DRIVER AIRBAG MODULE [OPEN]
[B1049] or [B1054]

Driver 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 air bag module.
4. Replace the spiral cable.
5. Replace the air bag diagnosis sen- sor unit.
6. Replace the related harness.
DRIVER AIRBAG MODULE
[VB-SHORT]
[B1050] or [B1055]

Driver air bag module circuit is shorted to some power sup-
ply circuit (including the spiral cable).
DRIVER AIRBAG MODULE [GND-SHORT]
[B1051] or [B1056]

Driver air bag module circuit is shorted to ground (including
the spiral cable).
DRIVER AIRBAG MODULE [SHORT]
[B1052] or [B1057]

Driver air bag module circuits are shorted to each other.

SRS-24
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
ASSIST A/B MODULE
[OPEN]
[B1065] or [B1070]
Front passenger air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible damage.
3. Replace front passenger air bag module.
4. Replace the air bag diagnosis sen- sor unit.
5. Replace the related harness.
ASSIST A/B MODULE
[VB-SHORT]
[B1066] or [B1071]

Front passenger air bag module circuit is shorted to some
power supply circuit.
ASSIST A/B MODULE [GND-SHORT]
[B1067] or [B1072]

Front passenger air bag module circuit is shorted to
ground.
ASSIST A/B MODULE [SHORT]
[B1068] or [B1073]

Front passenger air bag module circuits are shorted to
each other.
CRASH ZONE SEN [UNIT FAIL]
[B1033] or [B1034]
CRASH ZONE SEN
[COMM FAIL][B1035]

Crash zone sensor 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible damage.
3. Replace the crash zone sensor.
4. Replace the air bag diagnosis sen- sor unit.
5. Replace the related harness.
SIDE MODULE LH [OPEN]
[B1134]

Front LH side air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible damage.
3. Replace front LH seat back assem- bly (front LH side air bag module).
4. Replace the air bag diagnosis sen- sor unit.
5. Replace the related harness.
SIDE MODULE LH
[VB-SHORT]
[B1135]

Front LH side air bag module circuit is shorted to some
power supply circuit.
SIDE MODULE LH [GND-SHORT] [B1136]

Front LH side air bag module circuit is shorted to ground.
SIDE MODULE LH [SHORT][B1137]

Front LH side air bag module circuits are shorted to each
other.
SIDE MODULE RH [OPEN]
[B1129]

Front RH side air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible damage.
3. Replace front RH seat back assem- bly (front RH side air bag module).
4. Replace the air bag diagnosis sen- sor unit.
5. Replace the related harness.
SIDE MODULE RH
[VB-SHORT][B1130]

Front RH side air bag module circuit is shorted to some
power supply circuit.
SIDE MODULE RH [GND-SHORT] [B1131]

Front RH side air bag module circuit is shorted to ground.
SIDE MODULE RH [SHORT]
[B1132]

Front RH side air bag module circuits are shorted to each
other.
SATELLITE SENS LH [UNIT FAIL]
[B1118] or [B1119]
SATELLITE SENS LH [COMM FAIL][B1120]

LH side air bag (satellite) sensor 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible damage.
3. Replace the LH side air bag (satel- lite) sensor.
4. Replace the air bag diagnosis sen- sor unit.
5. Replace the related harness.
Diagnostic item
Explanation Repair order
Recheck SRS at each replacement

TROUBLE DIAGNOSISSRS-25
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Revision: November 2009 2006 QX56
SATELLITE SENS RH
[UNIT FAIL]
[ B 111 3 ] o r [ B 111 4 ]
SATELLITE SENS RH [COMM FAIL]
[B1115]

RH side air bag (satellite) sensor 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible damage.
3. Replace the RH side air bag (satel- lite) sensor.
4. Replace the air bag diagnosis sen- sor unit.
5. Replace the related harness.
PRE-TEN FRONT LH [OPEN]
[B1086]

The circuit for front LH seat belt pre-tensioner is open. 1. Visually check the wiring harness connections.
2. Replace the harness if it has visible damage.
3. Replace front LH seat belt pre-ten- sioner.
4. Replace the air bag diagnosis sen- sor unit.
5. Replace the related harness.
PRE-TEN FRONT LH
[VB-SHORT][B1087]

The circuit for front LH seat belt pre-tensioner is shorted to
some power supply circuit.
PRE-TEN FRONT LH [GND-SHORT] [B1088]

The circuit for front LH seat belt pre-tensioner is shorted to
ground.
PRE-TEN FRONT LH [SHORT]
[B1089]

The circuits for the front LH seat belt pre-tensioner are
shorted to each other.
PRE-TEN FRONT RH [OPEN]
[B1081]

The circuit for front RH seat belt pre-tensioner is open. 1. Visually check the wiring harness connections.
2. Replace the harness if it has visible damage.
3. Replace front RH seat belt pre-ten- sioner.
4. Replace the air bag diagnosis sen- sor unit.
5. Replace the related harness.
PRE-TEN FRONT RH
[VB-SHORT][B1082]

The circuit for front RH seat belt pre-tensioner is shorted to
some power supply circuit.
PRE-TEN FRONT RH [GND-SHORT]
[B1083]

The circuit for front RH seat belt pre-tensioner is shorted to
ground.
PRE-TEN FRONT RH [SHORT][B1084]

The circuits for the front RH seat belt pre-tensioner are
shorted to each other.
PRE-TEN2 FRONT LH [OPEN][B1182]

The circuit for front LH seat belt buckle pre-tensioner is
open. 1. Visually check the wiring harness
connections.
2. Replace the harness if it has visible damage.
3. Replace front LH seat belt buckle pre-tensioner.
4. Replace the air bag diagnosis sen- sor unit.
5. Replace the related harness.
PRE-TEN2 FRONT LH
[VB-SHORT]
[B1183]

The circuit for front LH seat belt buckle pre-tensioner is
shorted to some power supply circuit.
PRE-TEN2 FRONT LH [GND-SHORT][B1184]

The circuit for front LH seat belt buckle pre-tensioner is
shorted to ground.
PRE-TEN2 FRONT LH [SHORT][B1185]

The circuits for the front LH seat belt buckle pre-tensioner
are shorted to each other.
Diagnostic item
Explanation Repair order
Recheck SRS at each replacement

SRS-26
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
PRE-TEN2 FRONT RH
[OPEN]
[B1177]
The circuit for front RH seat belt buckle pre-tensioner is
open. 1. Visually check the wiring harness
connections.
2. Replace the harness if it has visible damage.
3. Replace front RH seat belt buckle pre-tensioner.
4. Replace the air bag diagnosis sen- sor unit.
5. Replace the related harness.
PRE-TEN2 FRONT RH
[VB-SHORT][B1178]

The circuit for front RH seat belt buckle pre-tensioner is
shorted to some power supply circuit.
PRE-TEN2 FRONT RH [GND-SHORT][B1179]

The circuit for front RH seat belt buckle pre-tensioner is
shorted to ground.
PRE-TEN2 FRONT RH [SHORT]
[B1180]

The circuits for the front RH seat belt buckle pre-tensioner
are shorted to each other.
FR CURTN MODULE LH [OPEN]
[B1198]

The LH side front curtain air bag module circuit is open. 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace LH side curtain air bag module.
4. Replace the air bag diagnosis sen- sor unit.
5. Replace the related harness.
FR CURTN MODULE LH
[VB-SHORT][B1199]

The LH side front curtain air bag module circuit is shorted
to some power supply circuits.
FR CURTN MODULE LH [GND-SHORT][B1200]

The LH side front curtain air bag module circuit is shorted
to ground.
FR CURTN MODULE LH [SHORT]
[B1201]

The circuits for the LH side front curtain air bag module are
shorted to each other.
FR CURTN MODULE RH [OPEN]
[B1193]

The RH side front curtain air bag module circuit is open. 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace RH side curtain air bag module.
4. Replace the air bag diagnosis sen- sor unit.
5. Replace the related harness.
FR CURTN MODULE RH
[VB-SHORT][B1194]

The RH side front curtain air bag module circuit is shorted
to some power supply circuits.
FR CURTN MODULE RH [GND-SHORT]
[B1195]

The RH side front curtain air bag module circuit is shorted
to ground.
FR CURTN MODULE RH [SHORT][B1196]

The circuits for the RH side front curtain air bag module are
shorted to each other.
CURTAIN MODULE LH [OPEN]
[B1150]

The LH side rear curtain air bag module circuit is open. 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace LH side curtain air bag module.
4. Replace the air bag diagnosis sen- sor unit.
5. Replace the related harness.
CURTAIN MODULE LH
[VB-SHORT]
[B1151]

The LH side rear curtain air bag module circuit is shorted to
some power supply circuits.
CURTAIN MODULE LH [GND-SHORT][B1152]

The LH side rear curtain air bag module circuit is shorted to
ground.
CURTAIN MODULE LH [SHORT][B1153]

The circuits for the LH side rear curtain air bag module are
shorted to each other.
Diagnostic item
Explanation Repair order
Recheck SRS at each replacement

TROUBLE DIAGNOSISSRS-27
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Revision: November 2009 2006 QX56
CURTAIN MODULE RH
[OPEN]
[B1145]
The RH side rear curtain air bag module circuit is open. 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace RH side curtain air bag module.
4. Replace the air bag diagnosis sen- sor unit.
5. Replace the related harness.
CURTAIN MODULE RH
[VB-SHORT][B1146]

The RH side rear curtain air bag module circuit is shorted
to some power supply circuits.
CURTAIN MODULE RH [GND-SHORT][B1147]

The RH side rear curtain air bag module circuit is shorted
to ground.
CURTAIN MODULE RH [SHORT]
[B1148]

The circuits for the RH side rear curtain air bag module are
shorted to each other.
CONTROL UNIT [B1XXX]

Air bag diagnosis sensor unit is malfunctioning. 1. Visually check the wiring harness
connection.
2. Replace the air bag diagnosis sen- sor unit.
OCCUPANT SENS C/U [UNIT FAIL]
[B1017] or [B1021]

The OCS control unit is malfunctioning. 1. Replace RH front seat cushion/
occupant classification system con-
trol unit assembly.
OCCUPANT SENS C/U [UNIT FAIL] [B1020]

The OCS control unit is malfunctioning. 1. Replace the harness if it has visible
damage.
2. Replace the RH front seat cushion assembly. Do not disassemble the
seat cushion assembly.
3. Replace the RH front seat belt assembly.
OCCUPANT SENS C/U [COMM FAIL][B1022]

Communication between the OCS control unit and air bag
diagnosis sensor unit is interrupted. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible damage.
3. Replace RH front seat cushion assembly. Do not disassemble the
seat cushion assembly.
4. Replace the air bag diagnosis sen- sor unit.
5. Replace the related harness.
OCCUPANT SENS [UNIT FAIL][B1018]

OCS sensor is malfunctioning. 1. Visually check the wiring harness
connection to the OCS sensor.
2. Replace RH front seat cushion assembly. Do not disassemble the
seat cushion assembly.
BELT TENSION SENS [UNIT FAIL][B1019]

Belt tension sensor is malfunctioning. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible damage.
3. Replace RH front seat belt assem- bly.
4. Replace RH front seat cushion assembly. Do not disassemble the
seat cushion assembly.
5. Replace the related harness.
Diagnostic item
Explanation Repair order
Recheck SRS at each replacement

SRS-28
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
NOTE:
Follow the procedures in numerical order when repairing malfunctioning parts. Confirm whether malfunction is
eliminated using 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.
DIAGNOSTIC PROCEDURE 3
Final Check of SRS Using CONSULT-II—Diagnosis Mode
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunction might be detected
in self-diagnosis depending on control unit which carries out CAN communication.
1. After repairing SRS, connect both battery cables.
2. Connect CONSULT-II and CONSULT-II CONVERTER to data
link connector.
3. Turn ignition switch ON.
4. Touch “START (NISSAN BASED VHCL) ”.
5. Touch “AIR BAG”.
PASS A/B INDCTR CKT
[B1023]

Front passenger air bag off indicator is malfunctioning. 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace front passenger air bag off indicator.
4. Replace the air bag diagnosis sen- sor unit.
5. Replace the related harness.
FRONTAL COLLISION DETECTION[B1209]

Driver and front passenger air bag modules are deployed. 1. Refer to SRS-60, "COLLISION
DIAGNOSIS" .
SIDE COLLISION DETECTION [B1210]

Side or curtain air bag modules are deployed (with side air
bags only). 1. Refer to
SRS-60, "COLLISION
DIAGNOSIS" .
ROLLOVER DETECTION [B1211]

Curtain air bag module and seat belt pre-tensioner are
deployed. 1. Refer to
SRS-60, "COLLISION
DIAGNOSIS" .
Diagnostic item
Explanation Repair order
Recheck SRS at each replacement
BBIA0369E
BCIA0029E

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Revision: November 2009 2006 QX56
If "AIR BAG" is not indicated, refer to GI-40, "CONSULT-II Data
Link Connector (DLC) Circuit" .
6. Touch “SELF-DIAG [CURRENT]”.
7. If no malfunction is detected on “SELF-DIAG [CURRENT]”,
repair of SRS is completed. Go to step 8.
If any malfunction is detected on “SELF-DIAG [CURRENT]”, the
malfunctioning part is not repaired completely or another mal-
functioning part is detected. Go to SRS-22, "
DIAGNOSTIC
PROCEDURE 2" , and repair malfunctioning part completely.
8. Touch “ERASE”.
NOTE:
Touch “ERASE” to clear the memory of the malfunction
(“SELF-DIAG [PAST]”).
If the memory of the malfunction in “SELF-DIAG [PAST]” is not
erased, the User mode shows the system malfunction by the
operation of the warning lamp even if the malfunction is repaired
completely.
9. Touch “BACK” key of CONSULT-II to “SELECT DIAG MODE ”
screen. Touch “SELF-DIAG [PAST] ”.
BCIA0030E
BCIA0031E
SRS701
WHIA0152E
BCIA0031E