Toyota FJ Cruiser (GSJ 10, 15 series). Instruction — part 436
SEAT BELT – SEAT BELT WARNING SYSTEM
SB–11
SB
HOW TO PROCEED WITH
TROUBLESHOOTING
HINT:
•
Use these procedures to troubleshoot the seat belt
warning system.
NEXT
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery
before proceeding.
NEXT
Result:
B
A
(a) DATA LIST / ACTIVE TEST (see page
)
(b) Terminals of ECU (see page
NEXT
NEXT
1
VEHICLE BROUGHT TO WORKSHOP
2
INSPECT BATTERY VOLTAGE
3
PROBLEM SYMPTOMS TABLE
Result
Proceed to
Fault is not listed in problem symptoms
table
A
Fault is listed in problem symptoms
table
B
GO TO STEP 5
4
OVERALL ANALYSIS AND TROUBLESHOOTING
5
REPAIR OR REPLACE
SB–12
SEAT BELT – SEAT BELT WARNING SYSTEM
SB
NEXT
6
CONFIRMATION TEST
END
SEAT BELT – SEAT BELT WARNING SYSTEM
SB–13
SB
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the causes of the
problem symptom. The potential causes of the symptoms are
listed in order of probability in the "Suspected Area" column
of the table. Check each symptom by checking the suspected
areas in the order they are listed. Replace parts as
necessary.
Seat belt warning system
Symptom
Suspected area
See page
Front driver seat belt warning light does not operate
Front seat inner belt assembly (Driver side)
Wire harness
Combination meter assembly
Front passenger seat belt warning light does not
operate
Front seat inner belt assembly (Passenger side)
Wire harness
Occupant classification ECU
Center airbag sensor assembly
Combination meter assembly
Air conditioning amplifier
-
Integration control and panel assembly (Front passenger seat
belt warning light)
Seat belt warning buzzer does not sound (Front driver
and front passenger seat belt warning lights operate
normally)
Combination meter assembly
SB–14
SEAT BELT – SEAT BELT WARNING SYSTEM
SB
TERMINALS OF ECU
1.
COMBINATION METER ASSEMBLY
(a) Disconnect the E13 combination meter assembly
connector.
(b) Measure the voltage and resistance of the wire
harness side connector.
Standard:
If the result is not as specified, there may be a
malfunction in the wire harness.
(c) Reconnect the combination meter assembly
connector.
(d) Measure the voltage of the wire harness side
connector.
Standard:
If the result is not as specified, there may be a
malfunction in the wire harness.
E14
E13
E125398E02
Symbols (Terminals No.)
Wiring Color
Terminal Description
Condition
Specified Condition
E13-1 (B) - Body ground
R - Body ground
Battery
Always
11 to 14 V
E13-2 (IG+) - Body ground
R-L - Body ground
Ignition switch signal
Ignition switch OFF
→ ON
Below 1 V
→ 11 to 14 V
E13-21 (ES) - Body
ground
W-B - Body ground
Ground
Always
Below 1
Ω
Symbols (Terminal No.)
Wiring Color
Terminal Description
Condition
Specified Condition
E13-7 (WRNP) - Body
ground
LG - Body ground
Seat belt warning light
signal (Front passenger
side)
Ignition switch ON
Front passenger seat is
occupied and its seat belt
is unfastened
Alternating between 11 to
14 V and below 3 V
E13-7 (WRNP) - Body
ground
LG - Body ground
Seat belt warning light
signal (Front passenger
side)
Ignition switch ON
Front passenger seat is
occupied and its seat belt
is fastened
Below 1 V
E13-8 (L) - 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
E13-8 (L) - 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)
9 to 14 V
E13-10 (PBKL) - Body
ground
L-R - Body ground
Front seat inner belt signal
(Front passenger side)
Ignition switch ON
Front seat belt is
unfastened (Front
passenger side)
Below 1 V
E13-10 (PBKL) - Body
ground
L-R - Body ground
Front seat inner belt signal
(Front passenger side)
Ignition switch ON
Front seat belt is fastened
(Front passenger side)
8 to 14 V
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