TOYOTA SEQUOIA 2001 Service Repair Manual

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).

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

± 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

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

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).

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

± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1655
1849 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 when using the hand±held tester and start from step 3 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
OIL PRESS METERHIGH, 3/4, 1/2, 1/4, LOW (OFF)Confirm that the vehicle is stopped and engine is
idling.
OK:
Oil pressure receiver gauge readings change according to hand±held tester operation.
NG Replace combination meter
(See page IN±35).
OK

I01278
DI±1656
± DIAGNOSTICSCOMBINATION METER SYSTEM
1850 Author: Date:
2005 SEQUOIA (RM1146U)
2 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
OIL GAUGEOil Gauge /
Min.: 0 Max.: 255Tester indication changes accord-
ing to the oil pressure receiver
gauge angle.

OK:
Oil pressure displayed on the tester is almost the same as the actual oil pressure.
OK Replace combination meter.
(See page IN±35)
NG
3 Inspect oil pressure sender gauge.
PREPARATION:
Disconnect the connector from the oil pressure sender.
CHECK:
(a) Check that no continuity exists between the terminal and
ground with the engine stopped.
(b) Check that continuity exists between the terminal and
ground with the engine running.
HINT:
Oil pressure should be over 24.5 kPa (0.25 kgf/cm
2, 3.55 psi).
OK:
When engine is stopped:
No continuity
When engine is running:
Continuity
NG Replace oil pressure sender gauge.
OK

I28569
Combination Meter:
C5±27
I28581
Oil Pressure Sender Gauge
Wire Harness:
O2
± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1657
1851 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check harness and connector (Oil pressure sender gauge ± combination meter).
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±27 ± O2±1Below 1 W
C5±27 ± Body ground10 kW or higher
NG Repair or replace harness or connector.
OK
Replace combination meter
(See page IN±35).

I28564
I18
Ignition SWInstrument Panel J/BCombination Meter
Engine Room J/B F10
Fusible LB
BatteryIGN1
AM2
AM2 IG2
2D 2C11 1C 1H
1C1J 2
11
37 56B±R B±O
W±R
BB
4 5C624
W±R DI±1658
± DIAGNOSTICSCOMBINATION METER SYSTEM
1852 Author: Date:
2005 SEQUOIA (RM1146U)
Malfunction in volt meter
CIRCUIT DESCRIPTION
The voltmeter indicates the voltage applied to the IG terminal of the combination meter.
WIRING DIAGRAM
DID96±01