2007 INFINITI M35 ras

SB-22
PRE-CRASH SEAT BELT
Revision: 2007 April2007 M35/M45
2. CHECK PRE-CRASH SEAT BELT CONTOROL UNIT INPUT SIGNAL
With CONSULT-II
Select “B PEDAL SIG1” and “B PEDAL SIG2”, and then make sure that the voltage changes synchronized
with brake pedal operation.
Without CONSULT-II
1. Turn ignition switch ON.
2. Check voltage between pre-crash seat belt control unit harness
connector and ground.
OK or NG
OK >> Brake pedal stroke sensor system is normal.
NG >> GO TO 3.B PEDAL SIG1
Brake released → depressed : Approx. 1 → 4V
B PEDAL SIG 2
Brake released → depressed : Approx. 4 → 1V
PHIA0766E
Terminal
ConditionVoltage (V)
(Approx.) (+)
(–) Pre-crash seat
belt control unit
connectorTerminal
B14216
GroundBrake released →
depressed1 → 4
20 4 → 1
PHIA1134E

PRE-CRASH SEAT BELT
SB-23
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Revision: 2007 April2007 M35/M45
3. CHECK BRAKE PEDAL STROKE SENSOR HARNESS
1. Turn ignition switch OFF.
2. Disconnect pre-crash seat belt control unit connector and brake pedal stroke sensor connector.
3. Check continuity between pre-crash seat belt control unit har-
ness connector and brake pedal stroke sensor harness connec-
tor.
4. Check continuity between pre-crash seat belt control unit harness connector and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness between pre-crash seat belt control unit and brake pedal stroke sensor.
4. CHECK BRAKE PEDAL STROKE SENSOR POWER SUPPLY
1. Connect pre-crash seat belt control unit connector.
2. Turn ignition switch ON.
3. Check voltage between pre-crash seat belt control unit harness
connector and ground.
OK or NG
OK >> GO TO 5.
NG >> Replace pre-crash seat belt control unit.
AB
Continuity Pre-crash seat
belt control unit
connectorTerminalBrake pedal stroke
sensor connectorTerminal
B14216
E1251
Ye s 18 2
20 3
21 4
A
GroundContinuity
Pre-crash seat belt
control unit connectorTerminal
B14216
No 18
20
21
PHIA1135E
Terminal
Voltage (V)
(Approx.) (+)
(–) Pre-crash seat
belt control unit
connectorTerminal
B142 18 Ground 5
PHIA1136E

SB-24
PRE-CRASH SEAT BELT
Revision: 2007 April2007 M35/M45
5. CHECK BRAKE PEDAL STROKE SENSOR
Check continuity between brake pedal stroke sensor while perform-
ing brake operation.
OK or NG
OK >> Check harness connection.

If it is OK, replace pre-crash seat belt control unit.

If it is NG, repair or replace malfunction part.
NG >> Replace brake pedal stroke sensor.
Check Pre-Crash Seat Belt Motor LH Circuit [B2452]NHS0008E
1. CHECK SELF-DIAGNOSTIC RESULT
With CONSULT-II
Select “SELF-DIAG RESULTS” of CONSULT-II, and then make sure
that “SB MOTOR LH CIRC” is displayed.
Without CONSULT-II
When CONSULT-II is not used, omit this inspection, and then GO TO 2.
Displayed B2452?
Yes >> GO TO 2.
No >> Pre-crash seat belt motor LH circuit is OK.
Brake pedal stroke
sensor connectorTerminal ConditionResistance
(KΩ)
(Approx.)
E125 21
Brake released → depressed1.0 → 0.2
30.2 → 1.0
PHIA1137E
CONSULT-II display CONSULT-II display code
NO DTC —
SB MOTOR LH CIRC B2452
PHIA0768E

PRE-CRASH SEAT BELT
SB-25
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Revision: 2007 April2007 M35/M45
2. CHECK SEAT BELT MOTOR LH HARNESS
1. Turn ignition switch OFF.
2. Disconnect pre-crash seat belt control unit connector and pre-crash seat belt motor LH connector.
3. Check continuity between pre-crash seat belt control unit har-
ness connector and pre-crash seat belt motor LH harness con-
nector.
4. Check continuity between pre-crash seat belt control unit har-
ness connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK SEAT BELT MOTOR LH
Check continuity between pre-crash seat belt motor LH.
OK or NG
OK >> Replace pre-crash seat belt control unit.
NG >> Replace pre-crash seat belt motor LH.
AB
Continuity Pre-crash seat
belt control unit
connectorTerminalPre-crash seat
belt motor LH
connectorTerminal
B1424
B321
Ye s
62
A
GroundContinuity
Pre-crash seat belt
control unit connectorTerminal
B1424
No
6
PHIA1138E
Pre-crash seat belt
motor LH connectorTerminal Continuity
B32 1 2 Yes
PHIA1139E

SB-26
PRE-CRASH SEAT BELT
Revision: 2007 April2007 M35/M45
Check Pre-Crash Seat Belt Motor RH Circuit [B2451]NHS0008F
1. CHECK SELF-DIAGNOSTIC RESULT
With CONSULT-II
Select SELF-DIAG RESULTS” of CONSULT-II, and then make sure
that “SB MOTOR RH CIRC” is displayed.
Without CONSULT-II
When CONSULT-II is not used, omit this inspection, and then GO TO 2.
Displayed B2451?
Yes >> GO TO 2.
No >> Pre-crash seat belt motor RH circuit is OK.
2. CHECK SEAT BELT MOTOR RH HARNESS
1. Turn ignition switch OFF.
2. Disconnect pre-crash seat belt control unit connector and pre-crash seat belt motor RH connector.
3. Check continuity between pre-crash seat belt control unit har-
ness connector and pre-crash seat belt motor RH harness con-
nector.
4. Check continuity between pre-crash seat belt control unit har-
ness connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
CONSULT-II display CONSULT-II display code
NO DTC —
SB MOTOR RH CIRC B2451
PHIA0767E
AB
Continuity Pre-crash seat
belt control unit
connectorTe r m i n a lPre-crash seat
belt motor RH
connectorTerminal
B1421
B4222
Ye s
3 1
A
GroundContinuity
Pre-crash seat belt
control unit connectorTerminal
B1421
No
3
PHIA1140E

PRE-CRASH SEAT BELT
SB-27
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Revision: 2007 April2007 M35/M45
3. CHECK SEAT BELT MOTOR RH
Check continuity between pre-crash seat belt motor RH.
OK or NG
OK >> Replace pre-crash seat belt control unit.
NG >> Replace pre-crash seat belt motor RH.
Check Brake Pedal Stroke Sensor Shield Wire Circuit NHS0008G
1. CHECK PRE-CRASH SEAT BELT INPUT SIGNAL
With CONSULT-II
Select “B PEDAL SIG1 and 2” on DATA MONITOR screen, and then
make sure that the voltage does not change if brake pedal is not
operated.
NOTE:
Diagnosis should be performed with engine running, audio and air
conditioner operating.
Without CONSULT-II
1. Start engine.
2. Check voltage between pre-crash seat belt harness connector.
OK or NG
OK >> Brake pedal stroke sensor shield wire circuit is OK.
NG >> Check shield wire for damage. Repair or replace if necessary.
Pre-crash seat belt
motor RH connectorTerminal Continuity
B422 1 2 Yes
PHIA1139E
B PEDAL SIG1
Brake released :There is no change in the voltage
value, and it is almost constant
B PEDAL SIG2
Brake released :There is no change in the voltage
value, and it is almost constant.
Terminal
ConditionVoltage (V)
(Approx.) (+)
(–) Pre-crash seat
belt control unit
connectorTerminal
B14216
GroundPerformed with
engine running, audio
and air conditioner
operating and brake
pedal released.There is no
change in the
voltage value,
and it is almost
constant 20
PHIA0766E
PHIA1141E

SB-28
PRE-CRASH SEAT BELT
Revision: 2007 April2007 M35/M45
Removal and Installation of Pre-Crash Seat Belt Control UnitNHS0008H
REMOVAL
1. Remove trunk side finisher LH. Refer to EI-56, "Removal and Installation for Trunk Room Trim" .
2. Remove pre-crash seat belt control unit mounting bolts.
3. Remove pre-crash seat belt control unit connector, and the pre-
crash seat belt control unit.
INSTALLATION
Install in the reverse order of removal.
PHIA1125E

SEAT BELTS
SB-29
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Revision: 2007 April2007 M35/M45
SEAT BELTSPFP:86884
System DescriptionNHS0008I
SEAT BELT WARNING CHIME

With ignition switch turned ON and seat belt unfastened (seat belt switch ON), warning chime will sound
for approximately 6 seconds.

If warning chime does not sound, refer to DI-73, "Seat Belt Buckle Switch Signal Inspection" .
SEAT BELT WARNING LAMP

Fasten driver's seat belt.

The seat belt warning lamp should go out.

If the seat belt warning lamp does not go out, refer to DI-42, "Wiring Diagram — WARN —" .
Removal and Installation of Front Seat Belt NHS0008J
CAUTION:
Before servicing SRS, turn the ignition switch off, disconnect both battery cables and wait at least 3
minutes.
REMOVAL OF SEAT BELT RETRACTOR
1. Remove the outer anchor.

Remove the belt tension sensor cover and cover protector (passenger side only).

Disconnect the belt tension sensor connector (passenger side only).

Remove the fixing bolt of the outer anchor.
1. Outer anchor 2. Shoulder anchor 3. Pre-tensioner seat belt retractor
4. Belt tension sensor cover (passen-
ger side only)5. Cover protector (passenger side
only)6. Belt tension sensor connector (pas-
senger side only)
7. Anchor bolt 8. Anchor nut 9. Seat belt pre-tensioner connector
10. Pre-crash seat belt connector 11. Bolt 12. Seat belt adjuster
PHIA1106E