Toyota Camry 2007-2009 Service Manual - Seat_Belt
SEAT BELT – SEAT BELT WARNING SYSTEM
RESTRAINTSSEAT BELT
SEAT BELT WARNING SYSTEM
PARTS LOCATION
CLOCK ASSEMBLY:
FRONT PASSENGER SEAT BELT WARNING LIGHT
SB–1
COMBINATION
METER ASSEMBLY
- DRIVER SIDE SEAT
BELT WARNING LIGHT
CENTER AIRBAG SENSOR ASSEMBLY
SB
MAIN BODY ECU
(INSTRUMENT PANEL J/B)
- GAUGE NO. 2 FUSE
FRONT SEAT INNER BELT
ASSEMBLY (FRONT RH)
FRONT SEAT INNER BELT
ASSEMBLY (FRONT LH)
B137076E01
SB–2
F1
Combination
Meter Assembly
SEAT BELT – SEAT BELT WARNING SYSTEM
SYSTEM DIAGRAM
Center Airbag
Sensor Assembly
Occupant
Detection ECU
Front Seat Inner
Belt RH
SB
CANH
9
P/BE
CANL
Front Seat Inner
Belt LH
CANH
CANL
FSP+
FSP-
DBE+
DBE-
Road Sensor RL
FSR+
FSR-
SGD1
SV3
SIG3
SGD3
BSW
BGN
Road Sensor FL
SV1
SIG1
Road Sensor FR
10
19
F3
PBEW
GND1
IG
3
: CAN
from GAUGE
No. 2 fuse
SV2
SIG2
Road Sensor RRClock Assembly
SGD2
SV4
SIG4
SGD4
B137075E01
SEAT BELT – SEAT BELT WARNING SYSTEM
SYSTEM DESCRIPTION
1. Driver seat belt warning light
(a) When the driver seat belt is not fastened with the
ignition switch on (IG), the driver seat belt warning
light on the combination meter assembly comes on
to inform the driver. The center airbag assembly
detects the driver seat belt status and sends signals
to the combination meter assembly using CAN.
2. Passenger seat belt warning
(a) When the passenger seat belt is not fastened with
the ignition switch on (IG) and the passenger seat
occupied, check that the passenger seat belt
warning light on the clock display blinks. The
combination meter assembly displays the
passenger seat belt status and whether the
passenger seat is occupied.
SB–3
SB
SB–4
1
NEXT
2
SEAT BELT – SEAT BELT WARNING SYSTEM
HOW TO PROCEED WITH
TROUBLESHOOTING
HINT:
• Use the following procedures to troubleshoot the seat belt
warning system.
• *: Use the intelligent tester.
VEHICLE BROUGHT TO WORKSHOP
INSPECT BATTERY VOLTAGE
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery
before proceeding to the next step.
SB
NEXT
3
A
4
NEXT
CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM (CAN)*
(a) Use the intelligent tester to check if the CAN
Communication System (CAN) is functioning normally.
Result
Result Proceed to
CAN DTC is not output A
CAN DTC is output B
B
PROBLEM SYMPTOMS TABLE
HINT:
See page SB-4.
GO TO CAN COMMUNICATION SYSTEM
5
NEXT
OVERALL ANALYSIS AND TROUBLESHOOTING*
(a) DATA LIST / ACTIVE TEST (See page SB-7)
(b) Terminals of ECU (See page SB-4)
(c) On-vehicle Inspection (See page SB-7)
6
NEXT
7
NEXT
END
SEAT BELT – SEAT BELT WARNING SYSTEM
REPAIR OR REPLACE
CONFIRMATION TEST
SB–5
SB
SB–6
SEAT BELT – SEAT BELT WARNING SYSTEM
SEAT BELT WARNING SYSTEM
Symptom Suspected area See page
Driver side seat belt warning light does not operate
Front passenger seat belt warning light does not
operate
PROBLEM SYMPTOMS TABLE
1. Front seat inner belt LH SB-9
2. Center airbag sensor assembly SB-9
3. Combination meter assembly SB-9
4. Wire harness SB-9
1. Front seat inner belt RH SB-11
2. Occupant detection ECU SB-11
3. Road sensor SB-11
4. Center airbag sensor assembly SB-11
5. Combination meter assembly SB-11
6. Clock assembly SB-11
7. Wire harness SB-11
SB
SEAT BELT – SEAT BELT WARNING SYSTEM
TERMINALS OF ECU
1. CLOCK ASSEMBLY
F3
Standard voltage
Terminal No. (Symbols) Terminal Description Condition Specified Condition
F3-3 (IG) - Body ground Power supply Ignition switch OFF → ON (IG) Below 1 V → 10 to 14 V
Standard resistance
Terminal No. (Symbols) Terminal Description Condition Specified Condition
The passenger seat is
F3-10 (PBEW) - Body ground Passenger seat belt signal
F3-19 (GND1) - Body ground Ground Always Below 1 Ω
occupied, seat belt is fastened
→ unfastened
Below 1 Ω → 10 kΩ or higher
SB–7
B140734E01
SB
SB–8
CG
SG
CANH
SEAT BELT – SEAT BELT WARNING SYSTEM
DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) The seat belt warning system data can be read from
the Data Link Connector 3 (DLC3) of the vehicle.
When the system seems to be malfunctioning, use
the intelligent tester to check for malfunctions and
perform repairs.
2. CHECK DLC3
SIL
SB
CANL
BAT
H100769E16
(a) The ECU uses ISO 15765-4 communication. The
terminal arrangement of the DLC3 complies with
SAE J 1962 and matches the ISO 15765-4 format.
DLC3
Intelligent Tester
C131977E01
Symbols (Terminals No.) Terminal Description Condition Specified Condition
SIL (7) - SG (5) Bus "+" line During transmission Pulse generation
CG (4) - Body ground Chassis ground Always Below 1 Ω
SG (5) - Body ground Signal ground Always Below 1 Ω
BAT (16) - Body ground Battery positive Always 10 to 14 V
CANH (6) - CANL (14) CAN bus line Ignition switch OFF* 54 to 69 Ω
CANH (6) - CG (4) HIGH-level CAN bus line Ignition switch OFF* 200 Ω or more
CANL (14) - CG (4) LOW-level CAN bus line Ignition switch OFF* 200 Ω or more
CANH (6) - BAT (16) HIGH-level CAN bus line Ignition switch OFF* 6 kΩ or more
CANL (14) - BAT (16) LOW-level CAN bus line Ignition switch OFF* 6 kΩ or more
NOTICE:
*: Before measuring the resistance, leave the
vehicle as is for at least 1 minute and do not
operate the ignition switch, any other switches
or the door.
SEAT BELT – SEAT BELT WARNING SYSTEM
If the result is not as specified, the DLC3 may have
a malfunction. Repair or replace the harness and
connector.
HINT:
Connect the cable of the intelligent tester to the
DLC3, turn the ignition switch on (IG) and attempt to
use the tester. If the display indicates that a
communication error has occurred, there is a
problem either with the vehicle or with the tester.
• If communication is normal when the tester is
connected to another vehicle, inspect the DLC3
of the original vehicle.
• If communication is still not possible when the
tester is connected to another vehicle, the
problem may be in the tester itself. Consult the
Service Department listed in the tester's
instruction manual.
SB–9
SB
SB–10
SEAT BELT – SEAT BELT WARNING SYSTEM
DATA LIST / ACTIVE TEST
1. ACTIVE TEST
Performing the ACTIVE TEST using the intelligent tester
allows the meters, indicators and so on to operate
without removing any parts. Performing the ACTIVE
TEST as the first step in troubleshooting is one way to
shorten labor time.
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch on (IG).
(c) From the display on the tester, select the "ACTIVE
TEST".
METER:
Item Test Details Diagnostic Note
D-BELT REMIND D-SEAT BELT indicator light (OFF/ON) Confirm that the vehicle is stopped with the engine idling
P-BELT REMIND P-SEAT BELT indicator light (OFF/ON) Confirm that the vehicle is stopped with the engine idling
SB
SEAT BELT – SEAT BELT WARNING SYSTEM
ON-VEHICLE INSPECTION
1. INSPECT DRIVER SIDE SEAT BELT WARNING
(a) Turn the ignition switch on (IG).
(b) When the driver seat belt is not fastened, check that
the driver seat belt warning light on the combination
meter blinks.
(c) When the driver seat belt is fastened, check that the
driver seat belt warning light on the combination
meter is off.
2. INSPECT PASSENGER SIDE SEAT BELT WARNING
(a) Turn the ignition switch on (IG).
(b) When the front passenger seat belt is not fastened
with the passenger seat occupied, check that the
front passenger seat belt warning light on the clock
display blinks.
(c) When the front passenger seat belt is fastened with
the passenger seat occupied, check that the front
passenger seat belt warning light on the clock
display is off.
SB–11
3. INSPECT SEAT BELT WARNING BUZZER
HINT:
If the buzzer does not sound, the buzzer cancel setting
may be set to ON.
(a) Turn the ignition switch on (IG).
(b) When the vehicle is driven at approximately 25 km/h
(16 mph) or more while the driver or front passenger
seat belt is not being fastened, check that the
buzzer in the combination meter assembly sounds
at an interval of 1.2 seconds for 30 seconds.
(c) Check that the buzzer sounds at an interval of 0.4
seconds for 90 seconds.
(d) Check that the buzzer stops 2 minutes after the
buzzer starts sounding.
(e) After the buzzer has stopped, turn the ignition
switch off and then start the engine again. Drive the
vehicle at approximately 25 km/h (16 mph) or more
while the driver or front passenger seat belt is not
being fastened, and then check that the buzzer
sounds again.
(f) After the buzzer has stopped, fasten the driver and
front passenger seat belts. Drive the vehicle at
approximately 25 km/h (16 mph) or more and
unfasten the driver or front passenger seat belt, and
then check that the buzzer sounds again.
(g) After the buzzer has stopped, move the shift lever to
the R position, and then move it to the D position.
Drive the vehicle at approximately 25 km/h (16 mph)
or more, and then check that the buzzer sounds
again.
SB
SB–12
SEAT BELT – SEAT BELT WARNING SYSTEM
Driver Side Seat Belt Warning Light does not Operate
DESCRIPTION
When the ignition switch is on (IG), the center airbag sensor assembly transmit s front seat inner belt st ate
signals to the combination meter assembly through CAN. If the driver seat belt is not fastened, the
combination meter assembly blinks the driver seat belt warning light. If the seat belt is fastened, the
warning light goes off.
NOTICE:
The seat belt warning system uses CAN. Before troubleshooting the seat belt warning system,
perform "COMMUNICATION FUNCTION CHECK" by following "HOW TO PROCEED WITH
TROUBLESHOOTING" to confirm that the communication systems are normal.
WIRING DIAGRAM
F1 N3
Combination Meter
Assembly
Center Airbag
Sensor Assembly
Front Seat Inner
Belt Assembly LH
SB
IG+
: CAN
17
18
13
from GAUGE No. 2 fuse
12
CANH
CANL
E2
INSPECTION PROCEDURE
CHECK FOR DTCs
1
Result
Result Proceed to
Output DTC (CAN communication) A
Output DTC (Airbag system) B
No output DTC C
13
22
CANH
CANL
DBE+
DBE-
(a) Check for DTCs.
11
12
1
3
B137085E01
A
B
GO TO CAN COMMUNICATION SYSTEM
GO TO AIRBAG SYSTEM
C
2
METER
SEAT BELT – SEAT BELT WARNING SYSTEM
PERFORM ACTIVE TEST BY INTELLIGENT TESTER
(a) Operate the intelligent tester according to the steps on
the display and select "ACTIVE TEST".
Item Test Details Diagnostic Note
D-BELT REMIND D-SEAT BELT indicator light (OFF/ON)
OK:
Switch condition (ON/OFF) can be switched by
"ACTIVE TEST".
SB–13
Confirm that the vehicle is stopped with
the engine idling
OK
END
NG
REPLACE COMBINATION METER
ASSEMBLY
SB
SB–14
SEAT BELT – SEAT BELT WARNING SYSTEM
Front Passenger Side Seat Belt Warning Light Malfunction
DESCRIPTION
The occupant detection ECU detects the state of the front seat inner belt assembly RH and road sensor
when the front passenger seat is occupied with the ignition switch on (IG). If the front passenger seat belt
is not fastened, the front seat belt warning light on the clock display blinks. If th e seat be lt is fasten ed, the
warning light goes off.
WIRING DIAGRAM
SB
F1
Combination
Meter Assembly
CANH
9
P/SB
CANL
F3
Clock Assembly
10
PBEW
IG
19
GND1
Center Airbag
Sensor Assembly
CANH
FSP+
CANL
FSP-
Road Sensor RL
3
from GAUGE
No. 2 fuse
Occupant
Detection ECU
BSW
FSR+
BGN
FSR-
SV1
SIG1
SGD1
SV3
SIG3
SV2
SGD3
Front Seat Inner
Belt RH
Road Sensor FL
Road Sensor FR
: CAN
Road Sensor RR
SIG2
SGD2
SV4
SIG4
SGD4
B140735E01
SEAT BELT – SEAT BELT WARNING SYSTEM
INSPECTION PROCEDURE
CHECK FOR DTCs
1
Result
Result Proceed to
No output DTC A
Output DTC (CAN communication) B
Output DTC (Occupant detection) C
SB–15
(a) Check for DTCs.
B
C
GO TO CAN COMMUNICATION SYSTEM
GO TO OCCUPANT CLASSIFICATION
SYSTEM
A
CHECK WIRE HARNESS (BATTERY POSITIVE AND BODY GROUND)
2
(a) Disconnect the clock assembly connector.
F3
(b) Measure the voltage and resistance according to the
value(s) in the table below.
Standard voltage
Tester Connection Condition Specified Condition
F3-3 (IG) - Body ground Ignition switch on (IG) 10 to 14 V
Standard resistance
B137073E01
Tester Connection Condition Specified Condition
F3-19 (GND1) - Body
ground
NG
REPAIR OR REPLACE GAUGE NO. 2 FUSE,
HARNESS OR CONNECTOR
SB
Always Below 1 Ω
OK
CHECK CLOCK ASSEMBLY
3
F3
B137074E01
(a) Disconnect the clock assembly connector.
(b) Apply battery voltage to the connector according to the
table below.
Standard
Condition Specified Condition
Battery positive (+) → Terminal 3 (IG)
Battery negative (-) → Terminal 10
(PBEW), 19 (GND1)
NG
REPLACE CLOCK ASSEMBLY
Lights up (Seat belt warning light)
SB–16
OK
CHECK WIRE HARNESS (CLOCK ASSEMBLY - COMBINATION METER ASSEMBLY)
4
Clock Assembly:
F3
SEAT BELT – SEAT BELT WARNING SYSTEM
(a) Disconnect the combination meter assembly and clock
assembly connectors.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
Tester Connection Condition Specified Condition
PBEW
F1-9 (P/SB) - F3-10
(PBEW)
F1-9 (P/SB) - Body
ground
Always Below 1 Ω
Always 10 kΩ or higher
SB
Combination Meter Assembly:
P/SB
F1
B137077E01
NG
OK
REPLACE COMBINATION METER ASSEMBLY
REPAIR OR REPLACE HARNESS OR
CONNECTOR
SB–14
RESTRAINTSSEAT BELT
SEAT BELT – FRONT SEAT INNER BELT ASSEMBLY
FRONT SEAT INNER BELT ASSEMBLY
COMPONENTS
for Manual Seat:
FRONT SEAT HEADREST ASSEMBLY
42 (428, 31)
FRONT SEAT INNER
BELT ASSEMBLY
37 (377, 27)
INNER SEAT TRACK
BRACKET COVER
SB
SEAT TRACK COVER
37 (377, 27)
FRONT SEAT ASSEMBLY
for Power Seat:
FRONT SEAT HEADREST ASSEMBLY
42 (428, 31)
INNER SEAT TRACK
BRACKET COVER
FRONT SEAT INNER
BELT ASSEMBLY
37 (377, 27)
N*m (kgf*cm, ft.*lbf)
SEAT TRACK COVER
37 (377, 27)
FRONT SEAT ASSEMBLY
: Specified torque
B132031E01
SEAT BELT – FRONT SEAT INNER BELT ASSEMBLY
REMOVAL
1. DISCONNECT CABLE FROM NEGATIVE BATTERY
TERMINAL (for Manual Seat)
CAUTION:
Wait for 90 seconds after disconnecting the cable to
prevent airbag deployment (See page RS-1).
2. REMOVE FRONT SEAT HEADREST ASSEMBLY
3. REMOVE SEAT TRACK COVER (for Manual Seat)
(See page SE-16)
4. REMOVE INNER SEAT TRACK BRACKET COVER
(for Manual Seat) (See page SE-16)
5. REMOVE FRONT SEA T ASSEMBLY (for Manual Seat)
(See page SE-16)
6. REMOVE SEA T TRACK COVER (for Power Seat) (See
page SE-30)
7. REMOVE INNER SEAT TRACK BRACKET COVER
(for Power Seat) (See page SE-30)
SB–15
for Driver seat:
for Passenger seat:
Clamp
B132032E02
8. REMOVE FRONT SEAT ASSEMBLY (for Power Seat)
(See page SE-30)
9. REMOVE FRONT SEAT INNER BELT ASSEMBLY (for
Manual Seat)
(a) for Driver seat:
(1) Disconnect the connectors and disengage the
4 clamps.
(b) for Passenger seat:
(1) Disconnect the connector and disengage the 3
clamps.
SB
SB–16
SEAT BELT – FRONT SEAT INNER BELT ASSEMBLY
(c) Remove the nut and front seat inner belt assembly.
B132034
SB
for Driver seat:
for Passenger seat:
Clamp
10. REMOVE FRONT SEAT INNER BELT ASSEMBLY (for
Power Seat)
(a) for Driver seat:
(1) Disconnect the connectors and disengage the
4 clamps.
(b) for Passenger seat:
(1) Disconnect the connector and disengage the 3
clamps.
B132033E01
(c) Remove the nut and front seat inner belt assembly.
Protruding Parts
B132034
B132035E01
INSTALLATION
1. INSTALL FRONT SEAT INNER BELT ASSEMBLY (for
Manual Seat)
(a) Install the front seat inner belt assembly with the
nut.
Torque: 42 N*m (428 kgf*cm, 31 ft.*lbf)
NOTICE:
Do not allow the anchor part of the front seat
inner belt assembly to overlap the protruding
parts of the front seat adjuster.
SEAT BELT – FRONT SEAT INNER BELT ASSEMBLY
SB–17
for Driver seat:
for Passenger seat:
Clamp
Protruding Parts
B132032E02
B132035E01
(b) for Driver seat:
(1) Connect the connectors and engage the 4
clamps.
(c) for Passenger seat:
(1) Connect the connector and engage the 3
clamps.
2. INSTALL FRONT SEAT INNER BELT ASSEMBLY (for
Power Seat)
(a) Install the front seat inner belt assembly with the
nut.
Torque: 42 N*m (428 kgf*cm, 31 ft.*lbf)
NOTICE:
Do not allow the anchor part of the front seat
inner belt assembly to overlap the protruding
parts of the front seat adjuster.
SB
for Driver seat:
for Passenger seat:
Clamp
B132033E01
(b) for Driver seat:
(1) Connect the connectors and engage the 4
clamps.
(c) for Passenger seat:
(1) Connect the connector and engage the 3
clamps.
3. INST ALL FRONT SEAT ASSEMBLY (for Manual Seat)
(See page SE-24)
4. INST ALL INNER SEA T TRACK BRACKET COVER (for
Manual Seat) (See page SE-25)
5. INSTALL SEAT TRACK COVER (for Manual Seat)
(See page SE-25)
6. INSTALL FRONT SEAT ASSEMBLY (for Power Seat)
(See page SE-41)
7. INST ALL INNER SEA T TRACK BRACKET COVER (for
Power Seat) (See page SE-42)
8. INST ALL SEAT TRACK COVER (for Power Seat) (See
page SE-42)
SB–18
SEAT BELT – FRONT SEAT INNER BELT ASSEMBLY
9. INSTALL FRONT SEAT HEADREST ASSEMBLY
10. CONNECT CABLE TO NEGATIVE BATTERY
TERMINAL (for Manual Seat)
11. PERFORM ZERO POINT CALIBRATION AND
SENSITIVITY CHECK (for Front Passenger Seat)
(See page RS-242)
12. INSPECT SLIDE ADJUSTER LOCK (for Manual Seat)
13. INSPECT FRONT SEAT ASSEMBLY (for Power Seat)
(See page SE-42)
14. INSPECT SRS WARNING LIGHT
(See page RS-32)
SB
SEAT BELT – FRONT SEAT OUTER BELT ASSEMBLY
RESTRAINTSSEAT BELT
FRONT SEAT OUTER BELT ASSEMBLY
COMPONENTS
UPPER CENTER PILLAR GARNISH
FRONT DOOR OPENING
TRIM WEATHERSTRIP
SB–19
REAR DOOR OPENING
TRIM WEATHERSTRIP
42 (428, 31)
FRONT DOOR SCUFF PLATE
FRONT SEAT OUTER BELT ASSEMBLY
7.5 (77, 66 in.*lbf)
42 (428, 31)
LAP BELT OUTER ANCHOR COVER
N*m (kgf*cm, ft.*lbf)
: Specified torque
42 (428, 31)
42 (428, 31)
42 (428, 31)
REAR DOOR SCUFF PLATE
LOWER CENTER PILLAR GARNISH
FRONT SHOULDER BELT ANCHOR
ADJUSTER ASSEMBLY
SB
B132005E01
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