NISSAN LATIO 2007 Service Repair Manual

TROUBLE DIAGNOSIS
SRS-33
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SRS
Revision: June 20062007 Versa
NOTE:
Follow the procedures in numerical order when performing repairs. Confirm whether the repair has been suc-
cessful using air bag warning lamp or CONSULT-II after each repair. If malfunction is still observed, proceed to
the next step. When malfunction has been eliminated, further repair work is not required.
OCCUPANT SENS C/U
[COMM FAIL]
[B1022]Communication between the occupant classification system
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/
occupant classification system con-
trol unit assembly.
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness.
OCCUPANT SENS
[UNIT FAIL]
[B1018]Occupant classification sensor is malfunctioning. 1. Replace RH front seat cushion/
occupant classification system con-
trol unit 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/
occupant classification system con-
trol unit assembly.
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. Refer to SRS-54, "
COLLISION DIAG-
NOSIS" .
SIDE COLLISION
DETECTION
[B1210]Side or curtain air bag modules are deployed. Diagnostic item ExplanationRepair order
Recheck SRS at each replacement

SRS-34
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
Trouble Diagnosis Without CONSULT-IIEHS001V5
DIAGNOSTIC PROCEDURE 6
Inspect SRS Malfunction Using "AIR BAG" Warning Lamp—Diagnosis Mode
NOTE:
SRS will not enter Diagnosis mode if no malfunction is detected in User mode.
1. Turn ignition switch ON.
2. After “AIR BAG” warning lamp lights for 7 seconds, turn ignition switch OFF within 1 second.
3. Wait more than 3 seconds.
4. Repeat steps 1 to 3 two times.
5. Turn ignition switch ON.
SRS is now in Diagnosis mode.
"AIR BAG" warning lamp operates in Diagnosis mode according to the Warning Lamp Flash Code Chart:

TROUBLE DIAGNOSIS
SRS-35
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Revision: June 20062007 Versa
WARNING LAMP FLASH CODE CHART
SHIA0026E
WHIA0260E
WHIA0198E
WHIA0261E

SRS-36
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
WHIA0200E
WHIA0262E
WHIA0263E
WHIA0203E

TROUBLE DIAGNOSIS
SRS-37
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SRS
Revision: June 20062007 Versa
WHIA0204E
WHIA0264E
WHIA0265E
WHIA0266E

SRS-38
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
WHIA0267E
WHIA0211E
WHIA0212E

TROUBLE DIAGNOSIS
SRS-39
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SRS
Revision: June 20062007 Versa
Trouble Diagnosis: “AIR BAG” Warning Lamp Does Not Turn OffEHS001V6
DIAGNOSTIC PROCEDURE 7
1. CHECK CONDITION OF AIR BAG MODULE
Inspect for any deployed air bag modules or seat belt pre-tensioners.
Are any air bag modules or seat belt pre-tensioners deployed?
Yes >> Refer to SRS-54, "COLLISION DIAGNOSIS" .
No >> GO TO 2.
2. CHECK THE AIR BAG FUSE
Check 10A fuse [No. 1, located in the fuse block (J/B)].
Refer to PG-4, "
POWER SUPPLY ROUTING CIRCUIT" .
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. CHECK AIR BAG FUSE AGAIN
Replace 10A fuse [No. 1, located in the fuse block (J/B)] and turn ignition switch ON.
Does the fuse blow again?
Yes >> Repair harness.
No >> Inspection End.
4. CHECK AIR BAG DIAGNOSIS SENSOR UNIT
Connect CONSULT-II and touch “START”.
Is
“AIR BAG” displayed on CONSULT-II?
Yes >> GO TO 5.
No >> Visually inspect the air bag diagnosis sensor unit har-
ness connections. If the connections are OK, replace
the air bag diagnosis sensor unit. Refer to SRS-52,
"Removal and Installation" .
5. CHECK HARNESS CONNECTION
Check for loose connections between the combination meter and the air bag diagnosis sensor unit.
OK or NG
OK >> Replace air bag diagnosis sensor unit. Refer to SRS-52, "Removal and Installation" .
NG >> Properly connect the combination meter and air bag diagnosis sensor unit harness connectors. If
“AIR BAG” warning lamp still does not turn off, replace the wiring harness.
BCIA0030E

SRS-40
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
Trouble Diagnosis: “AIR BAG” Warning Lamp Does Not Turn OnEHS001V7
DIAGNOSTIC PROCEDURE 8
1. CHECK METER FUSE
Check the 10A fuse [No. 13, located in the fuse block (J/B)] .
Refer to PG-4, "
POWER SUPPLY ROUTING CIRCUIT" .
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2. REPLACE METER FUSE AND CHECK AGAIN
Replace 10A fuse [No. 13, located in the fuse block (J/B)] and turn ignition switch ON.
Does the fuse blow again?
Yes >> Replace harness.
No >> Inspection End.
3. CHECK HARNESS CONNECTIONS BETWEEN AIR BAG DIAGNOSIS SENSOR UNIT AND COMBI-
NATION METER
Inspect the harness and connectors between the air bag diagnosis sensor unit and the combination meter.
Do the harness or connectors have any visible damage?
Yes >> Replace harness.
No >> GO TO 4.
4. CHECK COMBINATION METER
Disconnect the air bag diagnosis sensor unit harness connectors and turn ignition switch ON.
Does
“AIR BAG” warning lamp turn on?
Yes >> Replace the air bag diagnosis sensor unit. Refer to SRS-52, "Removal and Installation" .
No >> Replace the combination meter. Refer to IP-19, "
COMBINATION METER" .

DRIVER AIR BAG MODULE
SRS-41
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SRS
Revision: June 20062007 Versa
DRIVER AIR BAG MODULEPFP:K8510
Removal and InstallationEHS001UD
REMOVAL
WA RN ING:

When servicing the SRS, do not work from directly in front of air bag module.

Always place air bag module with pad side facing upward.
CAUTION:

Before servicing the SRS, turn ignition switch OFF, discon-
nect both battery cables, then wait at least 3 minutes.

Do not attempt to repair or replace damaged direct-connect
SRS component connectors. If a driver air bag direct-con-
nect harness connector is damaged, the spiral cable must
be replaced.

Do not insert any foreign objects (screwdriver, etc.) into air
bag module or harness connectors.

Do not disassemble air bag module.

Do not expose the air bag module to temperatures exceeding 90°C (194°F).

Replace the air bag module if it has been dropped or sus-
tained an impact.

Do not allow oil, grease or water to come in contact with the
air bag module.
1. Disconnect the negative and positive battery cables, then wait at least 3 minutes.
2. Remove the covers RH/LH.
LHIA0108E
1. Driver air bag module 2. Steering wheel 3. Cover
Pawl
PHIA0291E
WHIA0321E

SRS-42
DRIVER AIR BAG MODULE
Revision: June 20062007 Versa
3. Place the steering wheel in the straight ahead position.
4. Release the driver air bag module retaining clips RH/LH.

Insert suitable 4mm - 6mm blunt tool (A) through LH access
hole on back side of steering wheel (1) and contact retaining
clip.
CAUTION:
Do not use sharp edged objects such as screwdrivers to
release driver air bag module from steering wheel, SRS
components may be unintentionally damaged.

Press tool inward with sufficient force on retaining clip (1) to
release LH pawl of driver air bag module from steering wheel.

Repeat for RH pawl of driver air bag module from steering
wheel.

Tilt top edge away from steering wheel, then lift upward
releasing lower pawl of driver air bag module from steering
wheel.
5. Disconnect driver air bag module connectors (1) and horn con-
nector (2).

For removal/installation of the direct-connect SRS connec-
tors, refer to SRS-8, "
Direct-connect SRS Component Con-
nectors" .
INSTALLATION
Installation is in the reverse order of removal.

For removal/installation of the direct-connect SRS connectors, refer to SRS-8, "Direct-connect SRS Com-
ponent Connectors" .

If driver air bag module is being replaced due to deployment, spiral cable must also be replaced. Refer to
SRS-44, "
SPIRAL CABLE" .

After the work is completed, perform self-diagnosis to check that no malfunction is detected. Refer to
SRS-21, "
SRS Operation Check" .
LHIA0109E
LHIA0110E
LHIA0111E
PHIA0953J