engine TOYOTA SEQUOIA 2001 Service Repair Manual

± 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

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

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

± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1659
1853 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
VOLT METER9 V / 12 V / 15 V / 18VConfirm that the vehicle is stopped and engine is
idling.
OK:
Volt meter readings change according to hand±held tester operation.
NG Replace combination meter
(See page IN±35).
OK
2 Check fuse.
CHECK:
Measure the resistance of the IGN1 fuse in the instrument panel J/B.
OK:
Below 1 W
CHECK:
Measure the resistance of the AM2 fuse in the engine room J/B.
OK:
Below 1 W
NG Inspect for short circuit in harness and all com-
ponents connected to fuse.
OK

DI1OH±18
DI±1686
± DIAGNOSTICSBODY CONTROL SYSTEM
1880 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
DOOR LOCK CONTROL
SymptomSuspected AreaSee page
Lock or unlock cannot be operated with door lock control switch.
1. Door lock control switch (Power source circuit)
(Driver's)
(Passenger's)
2. Body ECU
DI±1788
DI±1826
IN±35
Door key linked function does not operate.
1. Door key lock and unlock switch circuit (Driver's)
(Passenger's)
2. Body ECUDI±1794
DI±1832
IN±35
Key confinement prevention function does not operate.1. Key unlock warning switch circuit
2. Body ECUDI±1715
IN±35
Door lock function does not operate.1. Door lock motor circuit
2. Body ECUDI±1720
IN±35
THEFT DETERRENT SYSTEM
SymptomSuspected AreaSee page
No alerting condition is operated. (The system cannot be set.)
1. Security indicator circuit
2. Key unlock warning switch circuit
3. Courtesy light switch circuit
4. Door unlock detection switch circuit (Driver's)
(Passenger's)
5. Engine hood courtesy light switch circuit
6. Back door courtesy light switch circuit
7. Back door ECU
8. Body ECUDI±1731
DI±1715
DI±1728
DI±1791
DI±1829
DI±1725
DI±1864
IN±35
IN±35
Cannot be canceled when IG is turned ON with a key.
1. Key unlock warning switch circuit
2. Ignition switch
3. Body ECUDI±1715
BE±24
IN±35
Cannot be canceled when unlocking the back door with a key.1. Back door ECU
2. Body ECUIN±35
IN±35
Headlights do not light up as an alert function.1. Headlight relay circuit
2. Body ECUDI±1708
IN±35
Taillights do not light up as an alert function.1. Taillight relay circuit
2. Body ECUDI±1706
IN±35
Theft deterrent horn or vehicle horn does not sound.
1. Security horn circuit
2. Horn circuit
3. Body ECUDI±1734
DI±1764
IN±35
During warning condition, cannot be canceled by unlocking the
door with a key.1. Door key lock and unlock switch circuit (Driver's)
(Passenger's)
2. Body ECUDI±1794
DI±1832
IN±35
During warning condition, cannot be canceled by unlocking the
door with a key. (transmitter)1. Transmitter
2. Body ECUBE±99
IN±35
During warning condition, cannot be canceled by turning the igni-
tion ON with a key.1. Ignition switch
2. Key unlock warning switch circuit
3. Body ECUBE±24
DI±1715
IN±35
The system operated for more than 60 seconds.Body ECUIN±35
Glass breakage sensor does not operate.1. Glass breakage sensor circuit
2. Body ECUDI±1774
IN±35

DI±1690
± DIAGNOSTICSBODY CONTROL SYSTEM
1884 Author: Date:
2005 SEQUOIA (RM1146U) HCTY ± GND1
(B7±14 ± B6±6)
L±W ± W±BEngine hood courtesy
switch signalHood courtesy light switch ON
(Open)Below 1 V
HCTY ± GND1
(B7±14 ± B6±6)L±W ± W±BEngine hood courtesy
switch signalHood courtesy light switch OFF
(Close)10 to 14 V
WIG ± GND1
(B7±5 ± B6±6)L±Y ± W±BIgnition Switch (IG)Ignition switch LOCKBelow 1 V
WIG ± GND1
(B7±5 ± B6±6)L±Y ± W±BIgnition Switch (IG)Ignition switch ON10 to 14 V
IG ± GND1
(B7±6 ± B6±6)B±R ± W±BIgnition Switch (IG)Ignition switch LOCKBelow 1 V
IG ± GND1
(B7±6 ± B6±6)B±R ± W±BIgnition Switch (IG)Ignition switch ON10 to 14 V
RWW ± GND1
(B7±4 ± B6±6)G±B ± W±BRear washer switch
(ON)Rear washer switch ONBelow 1 V
RWW ± GND1
(B7±4 ± B6±6)G±B ± W±BRear washer switch
(ON)Rear washer switch OFF10 to 14 V
ACT+ ± GND1
(B5±1 ± B6±6)L±R ± W±BDoor lock motor (UN-
LOCK)Power door lock not operating or
operating to UNLOCKBelow 1 V
ACT+ ± GND1
(B5±1 ± B6±6)L±R ± W±BDoor lock motor (UN-
LOCK)Power door lock operating to
LOCK10 to 14 V
ACT± ± GND1
(B5±10 ± B6±6)L±B ± W±BDoor lock motor
(LOCK)Power door lock not operating or
operating to LOCKBelow 1 V
ACT± ± GND1
(B5±10 ± B6±6)L±B ± W±BDoor lock motor
(LOCK)Power door lock operating to UN-
LOCK twice10 to 14 V
MPX1
(B7±22)W±LMultiplex communica-
tion signalMultiplex communication circuit±
MPX2 (*2)
(B5±24)L±YMultiplex communica-
tion signalMultiplex communication circuit±
MPX3
(B7±20)G±OMultiplex communica-
tion signalMultiplex communication circuit±
ILE ± GND1
(B7±3 ± B6±6)W ± W±BIlluminationMap Light is offBelow 1 V
ILE ± GND1
(B7±3 ± B6±6)W ± W±BIlluminationMap Light is on10 to 14 V
PRG ± GND1
(B5±5 ± B6±6)V ± W±BWireless transmitter
signal groundWireless door look receiver com-
munication circuit±
RDA ± GND1
(B5±4 ± B6±6)R±G ± W±BWireless transmitter
signal inputWireless door lock control sys-
tem is operatedBelow 1 V
RDA ± GND1
(B5±4 ± B6±6)R±G ± W±BWireless transmitter
signal inputWireless door lock control sys-
tem is not operated10 to 14 V
HU ± GND1
(B6±11 ± B6±6)Y±R ± W±BHeadlight dimmer
switch (HI)Headlight dimmer switch position
is Hi beam or FLASHBelow 1 V
HU ± GND1
(B6±11 ± B6±6)Y±R ± W±BHeadlight dimmer
switch (HI)Headlight dimmer switch position
is not Hi beam or FLASH10 to 14 V
HF ± GND1
(B6±8 ± B6±6)R±L ± W±BHeadlight dimmer
switch (FLASH)Headlight dimmer switch position
is FLASHBelow 1 V
HF ± GND1
(B6±8 ± B6±6)R±L ± W±BHeadlight dimmer
switch (FLASH)Headlight dimmer switch position
is not FLASH10 to 14 V
TAIL ± GND1
(B6±7 ± B6±6)G ± W±BLight control switch
(TAIL)Light control switch TAIL or
HEADBelow 1 V

DID99±01
DI±1694
± DIAGNOSTICSBODY CONTROL SYSTEM
1888 Author: Date:
2005 SEQUOIA (RM1146U)
DATA LIST / ACTIVE TEST
1. DATA LIST
HINT:
According to the DATA LIST displayed by the hand±held tester, you can read the values of the switches,
sensors, actuators and so on without parts removal. Reading the DATA LIST as a first step of troubleshooting
is one of the methods to shorten labor time.
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON.
(c) According to the display on the tester, read the ºDATA LISTº.
BODY ECU:
ItemMeasurement Item/Display
(Range)Normal ConditionDiagnostic Note
KEY UNLK WRN SWKey unlock warning switch/ON or
OFFON: Key is in ignition key cylinder
OFF: No key is in ignition key cyl-
inder
±
ACC SWACC switch/ON or OFFON: Ignition switch ACC
OFF: Ignition switch OFF±
IG SWIG switch/ON or OFFON: Ignition switch ON
OFF: Ignition switch OFF±
PARKING BRAKE SWParking brake switch/ON or OFF
ON:
Parking brake pedal depressed
(ON)
OFF:
Parking brake released (OFF)
±
HOOD COURTSY SWHood courtesy switch/ON or OFF
ON: Engine hood OPEN
(Hood courtesy switch ON)
OFF: Engine hood CLOSED
(Hood courtesy switch OFF)
±
D DOR CTY SWDriver door courtesy light switch/
ON or OFFON: Driver door is opened
OFF: Driver door is closed±
P DOR CTY SWFront passenger door courtesy
light switch/ON or OFF
ON: Front passenger door is
opened
OFF: Front passenger door is
closed
±
Rr DOR CTY SWRear passenger door courtesy
light switch/ON or OFF
ON: Rear passenger door is
opened
OFF: Rear passenger door is
closed
±
MIRR SEL SW RRemote control mirror switch pas-
senger side/ON or OFF
ON: Remote control mirror switch
passenger side is selected
OFF: Remote control mirror switch
passenger side is not selected
±
MIRR SEL SW LRemote control mirror switch driv-
er side/ON or OFF
ON: Remote control mirror switch
driver side is selected
OFF: Remote control mirror switch
driver side is not selected
±
MIRR POS SW RRemote control mirror switch R
position/ON or OFF
ON: Remote control mirror switch
R position is selected
OFF: Remote control mirror switch
R position is not selected
±

DI94R±07
I28393
Hood Courtesy Switch Engine Room J/B
 ECU±B Fuse
 Door No. 2 Fuse
 H±LP RH Fuse (*2)
 H±LP LH Fuse (*2)
 DRL Fuse (*1)
Rear Washer Motor
Horn
Headlight
Rear washer switch
Ignition Switch
 Key Unlock Switch
DLC3 Body ECU
Instrument Panel J/B
 ECU±IG Fuse
 RAD No. 2 Fuse
 FOG Fuse
 FOG LIGHT Relay
 POWER MAIN Relay
 WSH Fuse
 STOP Fuse
 TAILLIGHT Relay Back Door Power
Window SwitchTheft Horn
Engine Room R/B
No.2
 DIMMER Relay
 DRL No. 4 Relay
 H±LP RH Fuse (*1)
 H±LP LH Fuse (*1)
 H±LP RL Fuse (*1)
 H±LP LL Fuse (*1)
Fog Light
Wireless Door
Control Receiver Wireless Door Lock Buzzer
Combination Meter Memory Seat Switch
(*1): w/ Daytime Running Light
(*2): w/o Daytime Running Light (Located behind
the instrument panel)
(Located behind
the heater control panel)
 DOME Fuse
 HEAD Relay
 HORN Relay
 DOME Fuse
Automatic Light Control Sensor
Stop Light Switch
Remote Control Mirror SwitchGlass Breakage
Sensor Microphone Glass Breakage
Sensor ECU
Combination Switch
 Light Control Switch
 Headlight Dimmer Switch
 Fog Light Switch DI±1698
± DIAGNOSTICSBODY CONTROL SYSTEM
1892 Author: Date:
2005 SEQUOIA (RM1146U)
PARTS LOCATION