sensor INFINITI FX35 2008 Service Manual

TROUBLE DIAGNOSISSRS-25
< SERVICE INFORMATION >
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OCCUPANT SENS
[UNIT FAIL]
[1018]  Trouble occurs in Occupant Classification System-SENS. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visi- ble damage.
3. Replace front passenger seat cushion and occupant classifica-
tion system control unit as an as-
sembly.
4. Replace diagnosis sensor unit (ACU).
BELT TENSION SENS
[UNIT FAIL]
[B1019]  Trouble occurs in Belt Tension
sensor (BTS), circuit of BTS—Oc-
cupant Classification System-CU, or Occupant Classification
System-CU. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visi- ble damage.
3. Replace passenger side seat belt assembly.
4. Replace diagnosis sensor unit
(ACU).
OCCUPANT SENS C/U
[UNIT FAIL]
[B1017] [B1020]
[B1021]  Trouble occurs in Occupant Classification System-CU. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visi-
ble damage.
3. Replace front passenger seat cushion and occupant classifica-
tion system control unit as an as-
sembly.
4. Replace diagnosis sensor unit
(ACU).
OCCUPANT SENS C/U
[COMM FAIL]
[B1022]  Trouble occurs in Occupant Classification System-CU, circuit of
OCS-CU-ACU, or ACU. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visi-
ble damage.
3. Replace front passenger seat cushion and occupant classifica-
tion system control unit as an as-
sembly.
4. Replace diagnosis sensor unit
(ACU).
PASS A/B INDCTR
CKT
[B1023]  Front passenger air bag cut-off indicator circuit is open, or short-
ed each other or to ground. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visi- ble damage.
3. Replace front passenger air bag off indicator unit.
4. Replace diagnosis sensor unit
(ACU).
DIAGNOSIS SENSOR
UNIT (CONTROL UNIT)
[B1026-B1031]  Diagnosis sensor is out of order.  Replace diagnosis sensor unit.
(ACU)
CRASH ZONE SEN
[UNIT FAIL]
[B1033] [B1034]
CRASH ZONE SEN
[COMM FAIL]
[B1035]  Crash zone sensor is out of order. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visi- ble damage.
3. Replace crash zone sensor.
4. Replace diagnosis sensor unit (ACU).
DIAGNOSIS SENSOR
UNIT (CONTROL UNIT)
[B1042-B1047]  Diagnosis sensor is out of order.  Replace diagnosis sensor unit.
(ACU)
Diagnostic item Explanation
Repair order
“Recheck SRS at each replacement”
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SRS-26
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
DRIVER AIR BAG
MODULE
[OPEN]
[B1049] [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 visi- ble damage.
3. Replace driver air bag module.
4. Replace spiral cable.
5. Replace diagnosis sensor unit (ACU).
DRIVER AIR BAG
MODULE
[VB-SHORT]
[B1050] [B1055]  Driver air bag module circuit is shorted to a power supply circuit
(including the spiral cable).
DRIVER AIR BAG
MODULE
[GND-SHORT]
[B1051] [B1056]  Driver air bag module circuit is shorted to ground (including the
spiral cable).
DRIVER AIR BAG
MODULE
[SHORT]
[B1052] [B1057]  Driver air bag module circuit is shorted between lines.
DIAGNOSIS SENSOR
UNIT (CONTROL UNIT)
[B1058-B1063]  Diagnosis sensor is out of order.  Replace diagnosis sensor unit.
(ACU)
ASSIST A/B MODULE
[OPEN]
[B1065] [B1070]  Front passenger air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visi- ble damage.
3. Replace front passenger air bag
module.
4. Replace diagnosis sensor unit (ACU).
ASSIST A/B MODULE
[VB-SHORT]
[B1066] [B1071]
 Front passenger air bag module circuit is shorted to a power sup-
ply circuit.
ASSIST A/B MODULE
[GND-SHORT]
[B1067] [B1072]  Front passenger air bag module circuit is shorted to ground.
ASSIST A/B MODULE
[SHORT]
[B1068] [B1073]  Front passenger air bag module circuit is shorted between lines.
DIAGNOSIS SENSOR
UNIT (CONTROL UNIT)
[B1074-B1079]  Diagnosis sensor is out of order.  Replace diagnosis sensor unit.
(ACU)
PRE-TEN FRONT RH
[OPEN]
[B1081]  Front RH pre-tensioner circuit is open. 1. Visually check the wiring harness
connections.
2. Replace the harness if it has visi- ble damage.
3. Replace front RH seat belt.
4. Replace diagnosis sensor unit
(ACU).
PRE-TEN FRONT RH
[VB-SHORT]
[B1082]
 Front RH pre-tensioner circuit is shorted to a power supply cir-
cuit.
PRE-TEN FRONT RH
[GND-SHORT]
[B1083]  Front RH pre-tensioner circuit is shorted to ground.
PRE-TEN FRONT RH
[SHORT]
[B1084]  Front RH pre-tensioner circuit is shorted between lines.
Diagnostic item Explanation
Repair order
“Recheck SRS at each replacement”
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
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TROUBLE DIAGNOSISSRS-27
< SERVICE INFORMATION >
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PRE-TEN FRONT LH
[OPEN]
[B1086]  Front LH pre-tensioner circuit is open. 1. Visually check the wiring harness
connections.
2. Replace the harness if it has visi- ble damage.
3. Replace the front LH seat belt.
4. Replace the diagnosis sensor unit.
5. Replace the related harness.
PRE-TEN FRONT LH
[VB-SHORT]
[B1087]
 Front LH pre-tensioner circuit is shorted to a power supply cir-
cuit.
PRE-TEN FRONT LH
[GND-SHORT]
[B1088]  Front LH pre-tensioner circuit is shorted to ground.
PRE-TEN FRONT LH
[SHORT]
[B1089]  Front LH pre-tensioner circuit is shorted between lines.
DIAGNOSIS SENSOR
UNIT (CONTROL UNIT)
[ B 11 0 6 - B 1111 ]  Diagnosis sensor is out of order.  Replace diagnosis sensor unit
(ACU).
SATELLITE SENS RH
[UNIT FAIL]
[ B 111 3 ] [ B 111 4 ]
SATELLITE SENS RH
[COMM FAIL]
[ B 111 5 ]  RH side air bag (Satellite) sensor 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visi-
ble damage.
3. Replace RH side air bag (Satel- lite) sensor.
4. Replace diagnosis sensor unit (ACU).
SATELLITE SENS LH
[UNIT FAIL]
[ B 111 8 ] [ B 111 9 ]
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 visi- ble damage.
3. Replace LH side air bag (Satel-
lite) sensor.
4. Replace diagnosis sensor unit (ACU).
DIAGNOSIS SENSOR
UNIT (CONTROL UNIT)
[ B 11 2 2 - B 11 2 7 ]  Diagnosis sensor is out of order.  Replace diagnosis sensor unit
(ACU).
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 visi- ble damage.
3. Replace front RH side air bag module.
4. Replace diagnosis sensor unit (ACU).
SIDE MODULE RH
[VB-SHORT]
[B1130]
 Front RH side air bag module circuit is shorted to a 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 circuit is shorted between lines.
Diagnostic item Explanation
Repair order
“Recheck SRS at each replacement”
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SRS-28
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
NOTE:
Follow the procedures in numerical order when repairing malfunctioning parts. Confirm whether malfunction is
eliminated using air bag warning lamp or CONSULT-III eac h 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 Diagnosis without CONSULT-IIIINFOID:0000000001524169
DIAGNOSTIC PROCEDURE
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 visi- ble damage.
3. Replace front LH side air bag module.
4. Replace diagnosis sensor unit
(ACU).
SIDE MODULE LH
[VB-SHORT]
[B1135]
 Front LH side air bag module circuit is shorted to a 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 circuit is shorted between lines.
DIAGNOSIS SENSOR
UNIT (CONTROL UNIT)
[ B 11 3 8 - B 11 4 3 ]  Diagnosis sensor is out of order.  Replace diagnosis sensor unit
(ACU).
CURTAIN MODULE RH
[OPEN]
[B1145]  RH side curtain air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visi-
ble damage.
3. Replace RH side curtain air bag module.
4. Replace diagnosis sensor unit (ACU).
CURTAIN MODULE RH
[VB-SHORT]
[B1146]
 RH side curtain air bag module circuit is shorted to a power sup-
ply circuit.
CURTAIN MODULE RH
[GND-SHORT]
[B1147]  RH side curtain air bag module circuit is shorted to ground.
CURTAIN MODULE RH
[SHORT]
[B1148]  RH side curtain air bag module circuit is shorted between lines.
CURTAIN MODULE LH
[OPEN]
[B1150]  LH side curtain air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visi- ble damage.
3. Replace LH side curtain air bag module.
4. Replace diagnosis sensor unit
(ACU).
CURTAIN MODULE LH
[VB-SHORT]
[B1151]
 LH side curtain air bag module circuit is shorted to a power sup-
ply circuit.
CURTAIN MODULE LH
[GND-SHORT]
[B1152]  LH side curtain air bag module circuit is shorted to ground.
CURTAIN MODULE LH
[SHORT]
[B1153]  LH side curtain air bag module circuit is shorted between lines.
DIAGNOSIS SENSOR
UNIT (CONTROL UNIT)
[B1202-B1207]  Diagnosis sensor is out of order.  Replace diagnosis sensor unit.
FRONTAL COLLISION-
DETECTION
[B1209]  Seat belt pre-tensioner and front air bag are deployed.  Go to
SRS-47, "
For Frontal Colli-
sion".
SIDE COLLISION DE-
TECTION
[B1210]  Side and curtain air bag is deployed.  Go to
SRS-48, "
For Side Collision".
Diagnostic item Explanation
Repair order
“Recheck SRS at each replacement”
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SRS-32
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Trouble Diagnosis: "AIR BAG" Warning Lamp Does Not Turn OFF
INFOID:0000000001524170
DIAGNOSTIC PROCEDURE
1.CHECK DEPLOYMENT OF AIR BAG MODULE
Check the air bag module.
Is
“AIR BAG MODULE” deployed?
YES >> Refer to SRS-47, "For Frontal Collision" or SRS-48, "For Side Collision".
NO >> GO TO 2.
2.CHECK AIR BAG FUSE
Check the air bag fuse. Refer to PG-16, "
Fuse".
Check 10A fuse [No.13, located in fuse block (J/B)] normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK AIR BAG FUSE AGAIN
Replace “AIR BAG” fuse and turn ignition switch ON.
Does the
“AIR BAG” fuse blow again?
YES >> Repair or replace main harness.
NO >> INSPECTION END
4.CHECK DIAGNOSIS SENSOR UNIT
Check the screen of CONSULT-III.
Is
“DIAGNOSIS SENSOR UNIT” displayed on CONSULT-III?
YES >> Replace diagnosis sensor unit.
NO >> GO TO 5.
5.CHECK HARNESS CONNECTION
Check the connection of harness connector.
Is harness connection between warning lamp and diagnosis sensor unit normal?
OK >> Check the intermittent incident.
NO >> Replace wiring harness connector.
Trouble Diagnosis: "AIR BAG" Warning Lamp Does Not Turn ONINFOID:0000000001524171
DIAGNOSTIC PROCEDURE
1.CHECK METER FUSE
Check the meter fuse. Refer to PG-16, "
Fuse".
Check 10A fuse [No.14, located in fuse block (J/B)] normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK METER FUSE AGAIN
PHIA1241E
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TROUBLE DIAGNOSISSRS-33
< SERVICE INFORMATION >
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Replace 10A fuse [No. 14, located in fuse block (J/B)] and turn ignition switch ON.
Does the meter fuse blow again?
YES >> Repair or replace the related harness.
NO >> INSPECTION END
3.CHECK HARNESS CONNECTION BETWEEN DIAGNO SIS SENSOR UNIT AND COMBINATION METER
Disconnect diagnosis sensor unit connec tor and turn ignition switch ON.
Does AIR BAG warning lamp turn ON?
YES >> Replace diagnosis sensor unit.
NO >> Replace combination meter assembly.
Passenger Seatbelt Warning System (Seatbelt reminder).
1.CHECK THE SYSTEM 1
Check seatbelt warning lamp function.
Seatbelt warning lamp turns ON in the following conditions.
 Driver seatbelt is fastened.
 Occupant is on passenger seat.
 Passenger seatbelt is not fasten.
OK or NG
OK >> GO TO 2.
NG >> Check the followings.  Harness between air bag diagnosis sensor unit and combination meter.
 Seatbelt buckle switch (passenger side) circuit.
 Seatbelt buckle switch (passenger side).If these are OK, replace air bag diagnosis sensor unit.
2.CHECK THE SYSTEM 2
Check seatbelt warning lamp function.
Seatbelt warning lamp turns OFF in the following conditions.
 Driver seatbelt is fastened.
 Occupant is on passenger seat.
 Passenger seatbelt is fastened.
OK or NG
OK >> System is OK.
NG >> Check the followings.  Seatbelt buckle switch (passenger side) circuit.
 Seatbelt buckle switch (passenger side).
If these are OK, replace air bag diagnosis sensor unit.
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SRS-42
< SERVICE INFORMATION >
CRASH ZONE SENSOR
CRASH ZONE SENSOR
Removal and InstallationINFOID:0000000001327768
WARNING:
 Before servicing SRS, turn ignition switch OFF, disconnect both ba ttery cables and wait at least 3
minutes.
 Do not use air tools or el ectric tools for servicing.
REMOVAL
1. Remove front grille. Refer to EI-22, "Component Parts Location".
2. Remove crash zone sensor connector.
3. Remove crash zone sensor fixing nuts.
CAUTION:
 Replace crash zone sensor if it has b een dropped or sustained an impact.
 Do not disassemble crash zone sensor.
 Do not use old fixing nuts afte r removal; replace with new nuts.
 Replace the crash zone sensor of deployed SRS dr iver air bag and deployed SRS front passenger air
bag.
INSTALLATION
Install in the reverse order of removal.
CAUTION:
 Be careful not to damage the crash zone sensor harness.
 After the work is completed, make sure no system malfunction is detected by air bag warning lamp.
 In case that malfunction is detected by the air ba g warning lamp, reset by the self-diagnosis function
and delete the memory by CONSULT −III.
 In case that malfunction is still de tected after the above operation, perform self-diagnosis to repair
malfunctions. Refer to SRS-23, "
SRS Operation Check".
PHIA0316E
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SIDE AIR BAG (SATELLITE) SENSOR
SRS-43
< SERVICE INFORMATION >
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SIDE AIR BAG (S ATELLITE) SENSOR
Removal and InstallationINFOID:0000000001327769
WARNING:
 Before servicing SRS, turn igniti on switch OFF, disconnect both ba ttery cables and wait at least 3
minutes.
 Do not use air tools or el ectric tools for servicing.
REMOVAL
1. Remove seat belt pre-tensioner. Refer to SB-3, "Removal and Installation of Front Seat Belt".
2. Remove side air bag (Satellite) sensor fixing nuts.
3. Remove the side air bag (Satellite) sensor connector.
CAUTION:
 Do not use old nuts; replace with new ones.
 Check side air bag (Satellite) senso r to ensure it is free of deformities, dents, cracks or rust. If it
shows any visible signs of da mage, replace it with new one.
 Do not disassemble side ai r bag (Satellite) sensor.
 Replace side air bag (Satellite) sensor if it has been dropped or sustained an impact.
 Replace the satellite sensor of de ployed SRS front side air bag and deployed SRS side curtain air
bag.
INSTALLATION
Install in the reverse order of removal.
CAUTION:
 Be careful not to damage the satellite sensor harness.
 After the work is completed, make sure no system malfunction is detected by air bag warning lamp.
 In case that malfunction is detected by the air ba g warning lamp, reset by the self-diagnosis function
and delete the memory by CONSULT −III.
 In case that malfunction is still detected after th e above operation, perform self-diagnosis to repair
malfunctions. Refer to SRS-23, "
SRS Operation Check".
PHIA0314E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
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SRS-44
< SERVICE INFORMATION >
DIAGNOSIS SENSOR UNIT
DIAGNOSIS SENSOR UNIT
Removal and InstallationINFOID:0000000001327771
WARNING:
 Before servicing SRS, turn ignition switch OFF, disconnect both ba ttery cables and wait at least 3
minutes.
 Do not use air tools or el ectric tools for servicing.
REMOVAL
1. Disconnect each harness connector for the ai r bag module and seat belt pre-tensioner.
2. Remove center console. Refer to IP-11, "
Removal and Installation".
3. Disconnect diagnosis sensor unit connector.
4. Remove TORX bolts from the diagnosis sensor unit.
CAUTION:
 Do not use old TORX bolts. Replace with new ones.
 Check diagnosis sensor unit bracket to ensure it is free of deformities, dents, cracks or rust. If it
shows any visible things of damage, replace with new one.
 Replace diagnosis sensor unit if it has been dropped or sustained an impact.
 Replace the diagnosis sensor unit of deployed SRS air bag and deployed SRS front seat belt pre-ten-
sioner.
INSTALLATION
Install in the reverse order of removal.
CAUTION:
 Be careful not to damage the diagnosis sensor harness.
 After the work is completed, make sure no system malfunction is detected by air bag warning lamp.
 In case that malfunction is detected by the air ba g warning lamp, reset by the self-diagnosis function
and delete the memory by CONSULT −III.
 In case that malfunction is still de tected after the above operation, perform self-diagnosis to repair
malfunctions. Refer to SRS-23, "
SRS Operation Check".
ECU DISCRIMINATED NO.
After replacing the diagnosis sensor unit, confirm that t he diagnosis sensor unit identification is correct for the
vehicle as equipped.
PHIA0315E
Specification ECU DISCRIMINATED No.
Models with driver and passenger air bags, seat belt pre-tensioner, side air bags and curtain air bags FB04
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SRS-46
< SERVICE INFORMATION >
OCCUPANT CLASSIFICATION SYSTEM CONTROL UNIT
OCCUPANT CLASSIFICATION SYSTEM CONTROL UNIT
Removal and InstallationINFOID:0000000001327772
The occupant classification system c ontrol unit, seat pressure sensor, and bladder are an integral part of the
front passenger seat cushion and are replaced as an assembly. Refer to SE-89, "
Removal and Installation".
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