Toyota FJ Cruiser (GSJ 10, 15 series). Instruction — part 438

SEAT BELT – SEAT BELT WARNING SYSTEM

SB–19

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(b) Measure the voltage and resistance of the wire

harness side connectors.

Standard:

If the result is not as specified, there may be a
malfunction in the wire harness.

(c) Reconnect the main body ECU (driver side J/B)

connectors.

(d) Measure the voltage of the wire harness side

connectors.

Standard voltage:

If the result is not as specified, there may be a
malfunction in the wire harness.

DIAGNOSIS SYSTEM

1.

CHECK DLC3
(a) The ECU uses ISO 15765-4 for communication.

The terminal arrangement of the DLC3 complies
with ISO SAE J1962 and matches the ISO 15765-4
format.

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 doors.

Symbols (Terminals No.)

Wiring Color

Terminal Description

Condition

Specified Condition

1B-4 (BECU) Body ground

W-R - Body ground

Power source circuit

(From battery)

Always

11 to 14 V

1H-2 (GND1) - Body

Ground

W-B - Body ground

Ground

Always

Below 1V

1A-7 (GND2) - Body

ground

W - Body ground

Ground

Always

Below 1

Ω

Symbols (Terminals No.)

Wiring Color

Terminal Description

Condition

Specified Condition

1F-8 (SIG) - Body ground

B-R - Body ground

Ignition switch signal

Ignition switch OFF

→ ON

Below 1V

→ 11 to 14V

E6-13 (DBKL) - Body

ground

G-Y - Body ground

Front seat inner belt signal

(Front driver side)

Ignition switch ON

Front seat belt is

unfastened (Front driver

side)

Below 1 V

E6-13 (DBKL) - Body

ground

G-Y - Body ground

Front seat inner belt signal

(Front driver side)

Ignition switch ON

Front seat belt is fastened

(Front driver side)

11 to 14 V

CG SG

BAT

SIL

CANH

CANL

H100769E16

Symbols (Terminal 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

11 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 higher

CANL (14) - CG (4)

LOW-level CAN bus line

Ignition switch OFF*

200

Ω or higher

CANH (6) - BAT (16)

HIGH-level CAN bus line

Ignition switch OFF*

6 k

Ω or higher

CANL (14) - BAT (16)

LOW-level CAN bus line

Ignition switch OFF*

6 k

Ω or higher

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SEAT BELT – SEAT BELT WARNING SYSTEM

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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 CAN VIM,
connect the CAN VIM to the DLC3, turn the ignition switch
ON 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 is probably in
the tester itself. Consult the Service Department listed in
the tester's instruction manual.

2.

INSPECT BATTERY VOLTAGE
Standard voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the
battery before proceeding.

3.

INSPECT FRONT DRIVER SEAT BELT WARNING
LIGHT
(a) Turn the ignition switch ON.
(b) When the driver seat belt is not fastened, check that

the combination meter assembly driver seat belt
warning light blinks.

(c) When the seat belt is fastened, check that the

combination meter assembly driver seat belt
warning light turns off.

4.

INSPECT FRONT PASSENGER SEAT BELT
WARNING LIGHT
(a) Turn the ignition switch ON.
(b) When the front passenger seat is occupied, but the

seat belt is not fastened, check that the front
passenger seat belt warning light on the integration
control and panel assembly blinks.

(c) When the front passenger seat belt is fastened,

check that the front passenger seat belt warning
light turns off.

5.

INSPECT SEAT BELT WARNING BUZZER USING
DRIVER SEAT BELT
(a) Turn the ignition switch ON.
(b) When the driver seat belt is not fastened within 1.8

seconds of the ignition switch being turned ON,
check that the seat belt warning buzzer sounds at
1.2 second intervals for 6 seconds.

(c) When the driver seat belt is not fastened within 13.8

seconds of the ignition switch being turned ON and
the vehicle speed reaches 12.4 mph (20 km/h) or
more, check that the buzzer sounds at 1.2 second
intervals for 9.6 seconds.

(d) After the buzzer has sounded for 9.6 seconds,

check that the buzzer sounds at 0.4 second
intervals for a further 20 seconds.

Intelligent Tester

DLC3

CAN VIM

H102157E03

SEAT BELT – SEAT BELT WARNING SYSTEM

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(e) When 29.6 seconds have elapsed since the buzzer

started sounding in step (c) above, check that the
buzzer stops sounding.

(f)

After the buzzer has stopped sounding, turn the
ignition switch OFF and then start the engine again.
With the driver seat belt unfastened, drive the
vehicle at 12.4 mph (20 km/h) or more. Check that
the buzzer sounds.

(g) After the buzzer has stopped sounding, fasten the

driver seat belt, drive the vehicle at 12.4 mph (20
km/h) or more, and then unfasten the seat belt.
Check that the buzzer sounds.

(h) After the buzzer has stopped sounding, move the

shift lever to R. Then move the shift lever to D (for A/
T only). With the driver seat belt unfastened, drive
the vehicle at 12.4 mph (20km/h) or more. Check
that the buzzer sounds.

6.

INSPECT SEAT BELT WARNING BUZZER USING
FRONT PASSENGER SEAT BELT
HINT:
If the following inspection is conducted by one person,
since the front passenger seat belt warning buzzer
function uses signals from the occupant classification
sensors, place an object with a weight of 36 kg (79.37 lb)
or more on the front passenger seat.
(a) Turn the ignition switch ON.
(b) When the front passenger seat belt is not fastened

within 1.8 seconds of the ignition switch being
turned ON, check that the seat belt warning buzzer
sounds at 1.2 second intervals for 6 seconds.

(c) When the front passenger seat belt is not fastened

within 13.8 seconds of the ignition switch being
turned ON and the vehicle speed reaches 12.4 mph
(20 km/h) or more, check that the buzzer sounds at
1.2 second intervals for 9.6 seconds.

(d) After the buzzer has sounded for 9.6 seconds,

check that the buzzer sounds at 0.4 second
intervals for a further 20 seconds.

(e) When 29.6 seconds have elapsed since the buzzer

started sounding in step (c) above, check that the
buzzer stops sounding.

(f)

After the buzzer has stopped sounding, turn the
ignition switch OFF and then start the engine again.
With the front passenger seat belt unfastened, drive
the vehicle at 12.4 mph (20 km/h) or more. Check
that the buzzer sounds.

(g) After the buzzer has stopped sounding, fasten the

front passenger seat belt, drive the vehicle at 12.4
mph (20 km/h) or more, and then unfasten the front
passenger seat belt. Check that the buzzer sounds.

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SEAT BELT – SEAT BELT WARNING SYSTEM

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(h) After the buzzer has stopped sounding, move the

shift lever to R. Then move the shift lever to D. With
the front passenger seat belt unfastened, drive the
vehicle at 12.4 mph (20km/h) or more. Check that
the buzzer sounds.