NISSAN X-TRAIL 2001 Service Repair Manual

SEAT BELT WARNING SYSTEM
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Wiring Diagram-S/WARN-/RHD modelsEHS000H1
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SEAT BELT WARNING SYSTEM
Terminal and Reference Value for Time Control Unit
EHS000H3
NOTE:
*1: When seat pressure switch is ON.
*2: Wire color is different depending on vehicle. Each wire color are as follows:
Symptom ChartEHS000GS
TERMINALWIRE
COLORITEM CONDITION VOLTAGE (V)
8W/BSeat belt warning lamp
(driver side) signalSeat belt warning lamp (driver
side) is illuminated.0
Seat belt warning lamp (driver
side) is not illuminated.Battery voltage
15 W/GSeat belt warning lamp
(passenger side) signalSeat belt warning lamp (passen-
ger side) is illuminated.0
Seat belt warning lamp (passen-
ger side) is not illuminated.Battery voltage
21 BR/WSeat belt buckle switch
(driver side) signalSeat belt buckle switch (driver
side) is unfastened.0
Seat belt buckle switch (driver
side) is fastened.Battery voltage
22 G/ORSeat belt buckle switch
(passenger side) signalSeat belt buckle switch (passen-
ger side) is unfastened.*10
Seat belt buckle switch (passen-
ger side) is fastened.*1Battery voltage
36 *2 Vehicle speed signal When the vehicle speed is
approx. 40km (25MPH).
Vehicle Wire color
A/T models L/W
M/T models with gasoline engine L/Y
Diesel engine models L/B
ELF1080D
Symptom Diagnoses/Service procedure Reference page
Seat belt warning lamp (driver side) is not
illuminated.Seat belt warning lamp inspection (driver side)SB-11
Seat belt buckle switch inspection (driver side)SB-14
If the above system are normal, replace time control unit. —
Seat belt warning lamp (passenger side) is
not illuminated.Seat belt warning lamp inspection (passenger side)SB-13
Seat belt buckle switch inspection (passenger side)SB-15
Seat pressure switch inspectionSB-16
If the above system are normal, replace time control unit. —
Seat belt chime does not activate.(Seat belt
warning lamp is operated)Vehicle speed signal inspectionSB-18
If the above system is normal, replace time control unit —

SEAT BELT WARNING SYSTEM
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Seat Belt Warning Lamp Inspection (Driver side)EHS000GT
1.FUSE INSPECTION
Check if 10A fuse [No.11, located in fuse block (J/B)] is blown.
OK or NG
OK >> GO TO 2.
NG >> Replace the 10A fuse [No.11, located in fuse block (J/B)].
2.POWER SUPPLY CIRCUIT
1. Disconnect combination meter harness connector.
2. Turn ignition switch “ON”.
3. Check voltage between combination meter harness connector
M46 terminal 46 (LHD models: W/L) or 59 (RHD models: W/L)
and ground.
OK or NG
OK >> GO TO3.
NG >> Repair or replace harness.
3.CHECK SEAT BELT BUCKLE SWITCH GROUND CIRCUIT
1. Connect combination meter.
2. Check continuity between combination meter harness connector
M46 terminal 46 (W/L) and 59 (W/B) (LHD models) or 59 (W/L)
and 48 (W/B) (RHD models)
OK or NG
OK >> GO TO 4.
NG >> Replace combination meter.Battery voltage should exist.
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Continuity should exist.
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SEAT BELT WARNING SYSTEM
4. HARNESS CONTINUITY INSPECTION
1. Turn ignition switch “OFF”.
2. Disconnect time control unit connector and combination meter
connector.
3. Check the following.
LHD models
–Check continuity between combination meter harness connector
M46 terminal 59 (W/B) and time control unit harness connector
M30 terminal 8 (W/B).
–Check continuity between combination meter harness connector
M46 terminal 59 (W/B) and ground.
RHD models
–Check continuity between combination meter harness connector
M46 terminal 48 (W/B) and time control unit harness connector
M30 terminal 8 (W/B).
–Check continuity between combination meter harness connector
M46 terminal 48 (W/B) and ground.
OK or NG
OK >> System is OK.
NG >> Repair or replace harness.Continuity should exist.
Continuity should not exist.
Continuity should exist.
Continuity should not exist.
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SEAT BELT WARNING SYSTEM
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Seat belt Warning Lamp Inspection (Passenger Side)EHS000GU
1.FUSE INSPECTION
Check if 10A fuse [No.11, located in fuse block (J/B)] is blown.
OK or NG
OK >> GO TO 2.
NG >> Replace the 10A fuse [No.11, located in fuse block (J/B)].
2.POWER SUPPLY CIRCUIT
1. Disconnect seat belt warning lamp (passenger side) connector.
2. Turn ignition switch “ON”.
3. Check voltage between seat belt warning lamp harness con-
nector M100 terminal 1 (W/L) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3.HARNESS CONTINUITY INSPECTION
1. Turn ignition switch “OFF”.
2. Disconnect seat belt warning lamp connector and time control
unit connector.
3. Check the following.
–Check continuity between seat belt warning lamp harness con-
nector M100 terminal 2 (W/G) and time control unit harness con-
nector M30 terminal 15 (W/G).
–Check continuity between seat belt warning lamp harness con-
nector M100 terminal 2 (W/G) and ground.
OK or NG
OK >> GO TO 4
NG >> Replacer or repair the harness.
4.SEAT BELT WARNING LAMP (PASSENGER SIDE) CHECK
Check continuity between seat belt warning lamp (passenger side)
harness connector M100 terminal 1 and 2.
OK or NG
OK >> Replace time control unit.
NG >> Replace seat belt warning lamp (passenger side).
Terminal
Vo lta g e [ V ] (+) (–)
ConnectorTerminal
(Wire color)ConnectorTerminal
(Wire color)
M100 1 (W/L) Ground Battery voltage
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Continuity should exist.
Continuity should not exist.
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Terminals
Continuity
(+) (–)
12No
21Yes
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SEAT BELT WARNING SYSTEM
Seat Belt Buckle Switch Inspection (Driver side)
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1. CHECK SEAT BELT BUCKLE SWITCH (DRIVER SIDE) INPUT SIGNAL
1. Turn ignition switch “ON”.
2. Check voltage between time control unit harness connector M31
terminal 21 (BR/W) and ground.
OK or NG
OK >> System is OK.
NG >> GO TO 2.
2. HARNESS CONTINUITY INSPECTION
1. Turn ignition switch “OFF”.
2. Disconnect time control unit harness connector and seat belt
buckle switch (driver side) harness connector.
3. Check the following.
–Check continuity between time control unit harness connector
M31 terminal 21 (BR/W) and seat belt buckle switch (driver side)
harness connector B10 terminal 1 (BR/W).
–Check continuity between time control unit harness connector
M31 terminal 21 (BR/W) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK SEAT BELT BUCKLE SWITCH (DRIVER SIDE)
Check continuity between seat belt buckle switch (driver side) har-
ness connector B10 terminals 1 and 2.
OK or NG
OK >> GO TO 4.
NG >> Replace seat belt buckle switch (driver side).
Terminal (Wire color) Condition (Driver
side seat belt
buckle switch)Vo l ta g e [V ]
(+) (–)
21 (BR/W) GroundFasten Battery voltage
Unfasten 0
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Continuity should exist.
Continuity should not exist.
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TerminalCondition (Driver side
seat belt buckle
switch)Continuity
1 2Fasten No
Unfasten Yes
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SEAT BELT WARNING SYSTEM
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4.CHECK SEAT BELT BUCKLE SWITCH GROUND CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect seat belt buckle switch (driver side) harness connec-
tor.
3. Check harness continuity between seat belt buckle switch
(driver side) harness connector B10 terminal 2 (B) and ground.
OK or NG
OK >> Replace time control unit.
NG >> Repair or replace harness.
Seat Belt Buckle Switch Inspection (Passenger Side)EHS000GX
1.CHECK SEAT BELT BUCKLE SWITCH (PASSENGER SIDE) INPUT SIGNAL
1. Turn ignition switch “ON”.
2. Check voltage between time control unit harness connector M31
terminal 22(G/OR) and ground.
NOTE:
When performing the following procedure, a person is sitting on the
passenger side seat. (As a result, the seat pressure sensor is turned
ON.)
OK or NG
OK >> System is OK.
NG >> GO TO 2.
2.HARNESS CONTINUITY INSPECTION
1. Turn ignition switch “OFF”.
2. Disconnect time control unit harness connector and seat belt
buckle switch (passenger side) harness connector.
3. Check the following.
–Check continuity between time control unit harness connector
M31 terminal 22 (G/OR) and seat belt buckle switch (passenger
side) harness connector B113 terminal 1 (G/OR).
–Check continuity between time control unit harness connector
M31 terminal 22 (G/OR) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness. Continuity should exist.
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Terminal Condition
(passenger side seat belt
buckle switch)Voltage [V]
(+) (–)
22 (G/OR) GroundFasten Battery voltage
Unfasten 0
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Continuity should exist.
Continuity should not exist.
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SEAT BELT WARNING SYSTEM
3. CHECK SEAT BELT BUCKLE SWITCH INPUT(PASSENGER SIDE)
1. Disconnect seat pressure switch harness connector.
2. Check continuity between seat belt buckle switch (passenger
side) harness connector B113 terminal 1 (G/OR) and seat belt
pressure switch harness connector B301 terminal 3.
OK or NG
OK >> GO TO 4.
NG >> Replace seat belt buckle switch (passenger side).
4. CHECK SEAT BUCKLE SWITCH GROUND CIRCUIT
Check continuity between seat buckle switch harness connector
B113 terminal 2 (B) and ground.
OK or NG
OK >> GO TO SB-16, "Seat Pressure Switch Inspection" .
NG >> Repair or replace harness.
Seat Pressure Switch InspectionEHS000GY
1. CHECK SEAT PRESSURE SWITCH
1. Turn ignition switch “OFF”.
2. Disconnect seat pressure switch harness connector.
3. Check continuity between seat pressure switch harness connec-
tor B301 terminal 3 and 4.
OK or NG
OK >> GO TO 2.
NG >> Replace seat pressure switch.
Terminal (wire color)Condition (pas-
senger side seat
buckle switch)Continuity
1 (G/OR) 3Fasten No
Unfasten Yes
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Continuity should exist.
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Terminal (wire color)Condition
(seat pressure switch)Continuity
34ON Yes
OFF No
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SEAT BELT WARNING SYSTEM
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2.HARNESS CONTINUITY INSPECTION
1. Disconnect seat belt buckle switch (passenger side).
2. Check the following.
–Check continuity between seat pressure switch harness connec-
tor B301 terminal 4 (B) and seat belt buckle switch harness con-
nector B113 terminal 2 (B).
–Check the following.Check continuity between seat pressure
switch harness connector B301 terminal 4 (B) and ground.
OK or NG
OK >> System is OK.
NG >> Repair or replace harness.Continuity should exist.
Continuity should not exist.
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SB-18
SEAT BELT WARNING SYSTEM
Vehicle Speed Signal Inspection
EHS000GZ
1. COMBINATION METER CHECK
Check the speed meter in combination meter operates normally.
OK or NG
OK >> GO TO 2.
NG >> Check combination meter system. Refer to DI-12, "
SYMPTOM CHART" (LHD models) or DI-32,
"SYMPTOM CHART" (RHD models).
2. VEHICLE SPEED INPUT SIGNAL INSPECTION
Start the engine, and check the voltage between time control unit harness connector M31 terminal 36 (*).
NOTE:
*: Wire color is different depending on vehicle. Each wire color are as follows:
OK or NG
OK >> System is OK.
NG >> GO TO 3.
Terminal
Vo l ta g e
(+) (–)
36* Ground
Vehicle Wire color
A/T models L/W
M/T models with gasoline engine L/Y
Diesel engine models L/B
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