Page 1849 of 4323

I28577
Wire Harness Connector
Front View:
R6
IG
T
E
± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1647
1841 Author: Date:
2005 SEQUOIA (RM1146U)
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 ºDATA LISTº.
METER:
ItemMeasurement Item /
Range (Display)Normal ConditionDiagnostic Note
LIGHT RHEOSTATLight Control Rheostat /
Min.: 0 Max.: 255Light 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 IN±35)
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)ConditionSpecified condition
R6±5 (E) ± Body groundAlwaysBelow 1 W
CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:
Terminal No. (Symbol)ConditionSpecified condition
R6±4 (T) ± Body groundLight control switch
TAIL or HEAD10 to 14 V
R6±1 (IG) ± Body groundIgnition switch ON10 to 14 V
NG Repair or replace harness or connector.
OK
Page 1850 of 4323
I28569
Combination Meter:
C5±22
I28577
Light Control Rheostat Switch
Wire Harness Front View:
R6
TR
I28571
Combination Meter :
C5±22
DI±1648
± DIAGNOSTICSCOMBINATION METER SYSTEM
1842 Author: Date:
2005 SEQUOIA (RM1146U)
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 W
C5±22 ± Body ground10 kW 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 connectionConditionSpecified condition
C5±22 ± Body groundIgnition switch ON, light
control switch OFF " ONBelow 1 V " 10 to 14 V
NG Replace combination meter
(See page IN±35).
OK
Page 1851 of 4323
I28576
270°
Bright
0°
DarkR6
TR ILL±
± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1649
1843 Author: Date:
2005 SEQUOIA (RM1146U)
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)ConditionSpecified condition
R6±3 (TR) ± Body ground
Rheostat knob turned fully
counterclockwise "
fully clockwise
Below 1 V " 10 to 14 V
R6±6 (ILL±) ± Body
groundRheostat 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 IN±35).
Page 1852 of 4323
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 IEJ8
J/C
F10
FLB BI2J24
J/C
4
5
BB B
B
AC5
C6
12 24
C64
Seat
BeltBuzzer
2D2C 11
AM2 1F 1C
1D1H
1C
1J 211
9 3
7
6 IGN1
56
AM2 IG2
W±BB±O
BR
W±R W±B
(*1)(*2)
W±B
(*1) W±B
(*1)(*1) (*2) (*1)(*1) (*1) G±Y G±YG±Y
(*2)
1 33 213
B16 B16 B16 B16
W±RG±Y
B±R W±RBI2 IN1
313
W±B
(*2)
DI±1650
± DIAGNOSTICSCOMBINATION METER SYSTEM
1844 Author: Date:
2005 SEQUOIA (RM1146U)
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
Page 1853 of 4323
± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1651
1845 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 when using the hand±held tester and start from step 2 when not using the
hand±held tester.
1 Perform active test by 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:
From the display on the tester, perform the ºACTIVE TESTº.
METER:
ItemTest DetailsDiagnostic Note
SEAT BELT BUZZROFF / ONConfirm that the vehicle is stopped and engine is
idling.
D BELT REMINDOFF / ONConfirm that the vehicle is stopped and engine is
idling.
OK:
Switch condition (ON/OFF) can be switched by ACTIVE TEST.
NG Replace combination meter
(See page IN±35).
OK
Page 1854 of 4323
I28578
w/o Power Seat:
B16
ON
OFF
I28579
w/ Power Seat:
B16
ON
OFF
DI±1652
± DIAGNOSTICSCOMBINATION METER SYSTEM
1846 Author: Date:
2005 SEQUOIA (RM1146U)
2 Inspect front seat inner belt (Driver side).
PREPARATION:
Disconnect the connector from the front seat inner belt assy
(Driver Side).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Terminal No.ConditionSpecified condition
(*1) B16±3 ± B16±13Seat belt is fastened10 kW or higher
(*1) B16±3 ± B16±13Seat belt is unfastenedBelow 1 W
(*2) B16±2 ± B16±3Seat belt is fastened10 kW or higher
(*2) B16±2 ± B16±3Seat belt is unfastenedBelow 1 W
*1: w/o Power Seat
*2: w/ Power Seat
NG Replace front seat inner belt (Driver side).
OK
Page 1855 of 4323
I28580
Front Seat Inner Belt:
(w/ Power Seat)
(w/o Power Seat)B16
B16
I28569
Combination Meter:
C5±4
± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1653
1847 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check harness and connector (Front seat inner belt ± combination meter and
front seat inner belt ± body ground).
PREPARATION:
Disconnect the C5 connector of the combination meter.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
C5±4 ± B16±2 (*1)Below 1 W
C5±4 ± B16±13 (*2)Below 1 W
B16±3 ± Body groundBelow 1 W
C5±4 ± Body ground10 kW or higher
*1: w/ Power Seat
*2: w/o Power Seat
NG Repair or replace harness or connector.
OK
Replace combination meter
(See page IN±35).
Page 1856 of 4323
I28563
O2
Oil Pressure SenderCombination Meter
Heat Wire
IG4C5
1L±B1627
L±B DI±1654
± DIAGNOSTICSCOMBINATION METER SYSTEM
1848 Author: Date:
2005 SEQUOIA (RM1146U)
Malfunction in oil pressure receiver gauge
CIRCUIT DESCRIPTION
The oil pressure sender detects the oil pressure generated by engine start.
The combination meter determines that the engine is on when the engine revolution is 400 rpm or more, and
determines that the engine is off when the engine revolution is 200 rpm or less.
The oil pressure receiver gauge detects and indicates the oil pressure applied to the oil pressure sender.
WIRING DIAGRAM
DID95±01