Toyota Sequoia (2005). Manual — part 463
I28577
Wire Harness Connector
Front View:
R6
IG
T
E
–
DIAGNOSTICS
COMBINATION METER SYSTEM
DI–1647
1841
INSPECTION PROCEDURE
1
Read value of hand–held tester.
PREPARATION:
(a)
Connect the hand–held tester to the DLC3.
(b)
Turn the ignition switch ON, and push the hand–held tester main switch ON.
CHECK:
Operate the hand–held tester according to the steps on the display and select ”DATA LIST”.
METER:
Item
Measurement Item /
Range (Display)
Normal Condition
Diagnostic Note
LIGHT RHEOSTAT
Light Control Rheostat /
Min.: 0 Max.: 255
Light control rheostat switch is
Dark (0)
→
Bright (255)
OK:
Light brightness can be changed within the specified range by manual operation.
OK
Replace combination meter.
(See page
)
NG
2
Check harness and connector (Power source circuit).
PREPARATION:
Disconnect the R6 light control rheostat switch connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Terminal No. (Symbol)
Condition
Specified condition
R6–5 (E) – Body ground
Always
Below 1
Ω
CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:
Terminal No. (Symbol)
Condition
Specified condition
R6–4 (T) – Body ground
Light control switch
TAIL or HEAD
10 to 14 V
R6–1 (IG) – Body ground
Ignition switch ON
10 to 14 V
NG
Repair or replace harness or connector.
OK
I28569
Combination Meter:
C5–22
I28577
Light Control Rheostat Switch
Wire Harness Front View:
R6
TR
I28571
Combination Meter :
C5–22
DI–1648
–
DIAGNOSTICS
COMBINATION METER SYSTEM
1842
3
Check harness and connector (Light control rheostat switch – combination me-
ter).
PREPARATION:
Disconnect the C5 and E4 connectors of the combination me-
ter.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester Connection (Symbol)
Specified Condition
C5–22 – R6–3 (TR)
Below 1
Ω
C5–22 – Body ground
10 k
Ω
or higher
NG
Repair or replace harness or connector.
OK
4
Inspect combination meter.
PREPARATION:
Reconnect the combination meter connector.
CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:
Tester connection
Condition
Specified condition
C5–22 – Body ground
Ignition switch ON, light
control switch OFF
→
ON
Below 1 V
→
10 to 14 V
NG
Replace combination meter
(See page
).
OK
I28576
270
°
Bright
0
°
Dark
R6
TR
ILL–
–
DIAGNOSTICS
COMBINATION METER SYSTEM
DI–1649
1843
5
Inspect light control rheostat switch.
PREPARATION:
(a)
Reconnect the light control rheostat switch connector.
(b)
Turn the ignition switch ON.
(c)
Turn the light control switch to the TAIL or HEAD position.
CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:
Tester connection
(Symbol)
Condition
Specified condition
R6–3 (TR) – Body ground
Rheostat knob turned fully
counterclockwise
→
fully clockwise
Below 1 V
→
10 to 14 V
R6–6 (ILL–) – Body
ground
Rheostat knob turned fully
counterclockwise
→
fully clockwise
Below 1 V
→
10 to 14 V
NG
Replace light control rheostat switch.
OK
Replace combination meter
(See page
).
I28562
Combination Meter
Instrument Panel J/B
Engine Room J/B
I18
Ignition SW
Front Seat
Inner Belt
(Buckle
SW LH)
*1: w/ Power Seat
*2: w/o Power Seat
Battery
BH
IE
J8
J/C
F10
FLB
BI2
J24
J/C
4
5
B
B
B
B
A
C5
C6
12
24
C6
4
Seat
Belt
Buzzer
2D
2C
1
1
AM2
1F
1C
1D
1H
1C
1J
2
11
9
3
7
6
IGN1
5
6
AM2
IG2
W–B
B–O
BR
W–R
W–B
(*1)
(*2)
W–B
(*1)
W–B
(*1)
(*1)
(*2) (*1)
(*1)
(*1)
G–Y
G–Y
G–Y
(*2)
1
3
3
2
13
B16 B16
B16 B16
W–R
G–Y
B–R
W–R
BI2
IN1
3
13
W–B
(*2)
DI–1650
–
DIAGNOSTICS
COMBINATION METER SYSTEM
1844
Seat belt warning for driver’s seat does not operate
CIRCUIT DESCRIPTION
A buzzer and indicator are included in the seat belt warning system. When the ignition switch is ON and the
seat belt on the driver side is not fastened, both the buzzer and indicator operate.
The buzzer and indicator are built into the combination meter.
WIRING DIAGRAM
DID94–01
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