2001 TOYOTA SEQUOIA relay

TOYOTA
Hand±held
Tester
D05981DLC3
BR1NG±05
BR±48
± BRAKEABS & VSC ACTUATOR
3215 Author: Date:
2005 SEQUOIA (RM1146U)
ABS & VSC ACTUATOR
ON±VEHICLE INSPECTION
1. CONNECT TOYOTA HAND±HELD TESTER:
(a) Connect the TOYOTA hand±held tester to the DLC3.
(b) Start the engine and run it at idle.
(c) Select the ACTIVE TEST mode on the TOYOTA hand±
held tester.
HINT:
Please refer to the TOYOTA hand±held tester operator's manu-
al for further details.
2. INSPECT ACTUATOR MOTOR OPERATION
(a) With the motor relay ON, check the actuator motor opera-
tion noise.
(b) Turn the motor relay OFF.
(c) Depress the brake pedal and hold it for about 15 seconds.
Check that the pedal does not go down any further while
holding.
(d) With the motor relay ON, check that the pedal does not
pulsate.
NOTICE:
Do not keep motor relay ON for more than 5 seconds con-
tinuously. When operating it continuously, set the interval
of more than 20 seconds.
(e) Turn the motor relay OFF and release the brake pedal.
3. INSPECT RIGHT FRONT WHEEL OPERATION
NOTICE:
Never turn ON the solenoid which is not described below.
(a) With the brake pedal depressed, perform the following
operations.
(b) Turn the SFRH and SFRR solenoid ON simultaneously,
and check that the pedal cannot be depressed.
NOTICE:
Do not keep solenoid ON for more than 10 seconds contin-
uously. When operating it continuously, set the interval of
more than 20 seconds.
(c) Turn the SFRH and SFRR solenoid OFF simultaneously,
and check that the pedal can be depressed.
(d) Turn the motor relay ON and check that the pedal returns.
NOTICE:
Do not keep motor relay ON for more than 5 seconds con-
tinuously. When operating it continuously, set the interval
of more than 20 seconds.
(e) Turn the motor relay OFF and release the brake pedal.
4. INSPECT OTHER WHEEL OPERATION
As in the same procedure, check the solenoids of other wheels.
HINT:
Left front wheel: SFLH, SFLR
Right rear wheel: SRRH, SRRR
Left rear wheel: SRLH, SRLR

BE19B±08
BE±2
± BODY ELECTRICALTROUBLESHOOTING
3406 Author: Date:
2005 SEQUOIA (RM1146U)
TROUBLESHOOTING
PROBLEM SYMPTOMS TABLE
POWER OUTLET
SymptomSuspect AreaSee page
Electric power source cannot be out of the power outlet.
1. PWR OUTLET Fuse
2. INVERTER Relay
3. Main Switch
4. Voltage Inverter
5. Wire HarnessBE±14
BE±20
BE±20
BE±20
±
IPO system does not operate.
Power source cannot be supplied from the power outlet socket
when the ignition switch is off.1. PWR OUTLET Fuse
2. INVERTER Relay
3. Instrument panel J/B (IPO) circuit
4. Wire HarnessBE±14
BE±20
BE±20
±
IGNITION SWITCH
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
SymptomSuspect AreaSee page
Ignition switch is not set to each position.
1. Ignition Switch
2. Power Source Circuit (Body ECU)
3. Power Source Circuit (Driver door ECU)
4. Power Source Circuit (Passenger door ECU)BE±24
DI±1700
BE±34
DI±1849
KEY UNLOCK WARNING SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
SymptomSuspect AreaSee page
Key unlock warning system does not operate.
(The buzzer does not sound when the driver's door is opened with
the ignition OFF and key inserted)1. Key Unlock Warning Switch
2. Driver Door Courtesy Light Switch
3. Wire Harness
4. Combination MeterBE±24
BE±40
±
±
Key unlock warning system does not operate.
(The buzzer sounds when the ignition key is ACC or ON)1. Ignition Switch
2. Wire Harness
3. Combination MeterBE±24
±
±
w/o Daytime Running Light:
HEADLIGHT AND TAILLIGHT SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
SymptomSuspect AreaSee page
Only one headlight comes on.1. Bulb
2. Wire Harness±
±
ºLO±Beamº does not light (All).
1. HEAD Relay
2. Headlight Dimmer Switch
3. Wire Harness
4. Body ECUBE±27
BE±27
±
±
ºLO±Beamº does not light (One side).
1. Bulb
2. H±LP LH Fuse
3. H±LP RH Fuse
4. Wire Harness±
BE±14
BE±14
±

± BODY ELECTRICALTROUBLESHOOTING
BE±3
3407 Author: Date:
2005 SEQUOIA (RM1146U) ºHI±Beamº does not light (All).
1. HEAD Relay
2. Headlight Dimmer Switch
3. Wire Harness
4. Body ECUBE±27
BE±27
±
±
ºHI±Beamº does not light (One side).
1. Bulb
2. H±LP LH Fuse
3. H±LP RH Fuse
4. Wire Harness±
BE±14
BE±14
±
ºFlashº does not light.
1. H±LP LH Fuse
2. H±LP RH Fuse
3. Bulb
4. Headlight Dimmer Switch
5. Wire Harness
6. Body ECUBE±14
BE±14
±
BE±27
±
±
Headlight does not come on.
1. Bulb
2. HEAD Relay
3. Light Control Switch
4. Wire Harness
5. Body ECU±
BE±27
DI±1750
±
±
Headlight flickers.
1. Bulb
2. Wire Harness
3. Body ECU±
±
±
Headlight is dark.
1. Bulb
2. Body ECU
3. Wire Harness±
±
±
Only one taillight comes on.1. Bulb
2. Wire Harness±
±
Taillight does not come on.
(Headlight is normal)
1. TAIL Fuse
2. TAILLIGHT Relay
3. Light Control Switch
4. Wire Harness
5. Body ECUBE±14
BE±27
BE±27
±
±
Taillight does not come on.
(Headlight does not come on)
1. TAIL Fuse
2. TAILLIGHT Relay
3. Light Control Switch
4. Wire Harness
5. Body ECUBE±14
BE±27
BE±27
±
±
Rear combination light does not come on.
1. Bulb
2. TAIL Fuse
3. TAILLIGHT Relay
4. Wire Harness
5. Body ECU±
BE±14
BE±27
±
±
w/ Daytime Running Light:
HEADLIGHT AND TAILLIGHT SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
SymptomSuspect AreaSee page
Only one headlight comes on.1. Bulb
2. Wire Harness±
±

BE±4
± BODY ELECTRICALTROUBLESHOOTING
3408 Author: Date:
2005 SEQUOIA (RM1146U) ºLO±Beamº does not light (All).
1. HEAD Relay
2. DRL Fuse
3. DIMMER Relay
4. DRL No. 4 Relay
5. Wire Harness
6. Body ECUBE±27
BE±14
BE±27
BE±27
±
±
ºLO±Beamº does not light (One side).
1. Bulb
2. H±LP LL Fuse
3. H±LP LP Fuse
4. Wire Harness±
BE±14
BE±14
±
ºHI±Beamº does not light (All).
1. HEAD Relay
2. Headlight Dimmer Switch
3. DRL Fuse
4. DIMMER Relay
5. DRL No. 4 Relay
6. Wire Harness
7. Body ECUBE±27
BE±27
BE±14
BE±27
BE±27
±
±
ºHI±Beamº does not light (One side).
1. Bulb
2. H±LP LL Fuse
3. H±LP LP Fuse
4. Wire Harness±
BE±14
BE±14
±
ºFlashº does not light.
1. Headlight Dimmer Switch
2. Wire Harness
3. Body ECUBE±27
±
±
Headlight does not come on.
1. Bulb
2. HEAD Relay
3. DIMMER Relay
4. DRL No. 4 Relay
5. Headlight Dimmer Switch
6. Light Control Switch
7. Wire Harness
8. Body ECU±
BE±27
BE±27
BE±27
BE±27
BE±27
±
±
Headlight does not go off when light control switch is in OFF posi-
tion.
1. Power Source Circuit (Body ECU)
2. HEAD Relay
3. DIMMER Relay
4. Light Control Switch
5. Wire Harness
6. Body ECUDI±1700
BE±27
BE±27
BE±27
±
±
Headlight flickers.
1. Bulb
2. Wire Harness
3. Body ECU±
±
±
Headlight is dark.
1. Bulb
2. Wire Harness
3. Body ECU±
±
±
Taillight does not come on when light control switch is in TAIL
position.
1. TAIL Fuse
2. TAILLIGHT Relay
3. Light Control Switch
4. Wire Harness
5. Body ECUBE±14
BE±27
BE±27
±
±

± BODY ELECTRICALTROUBLESHOOTING
BE±5
3409 Author: Date:
2005 SEQUOIA (RM1146U) Taillight does not go off when light control switch is in OFF posi-
tion.
1. TAILLIGHT Relay
2. Light Control Switch
3. Wire Harness
4. Body ECUBE±27
BE±27
±
±
Headlight does not come on when engine is running and light
control switch is in OFF position .
1. ECU±B Fuse
2. MAIN Fuse
3. HEAD Relay
4. DRL Fuse
5. DRL No. 4 Relay
6. DIMMER Relay
7. Parking Brake Switch
8. Wire Harness
9. Body ECUBE±14
BE±14
BE±27
BE±14
BE±27
BE±55
BE±55
±
±
FOG LIGHT SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
SymptomSuspect AreaSee page
Fog light does not come on with light control switch is in HEAD
position.
(Headlight is normal.)
1. FOG Fuse
2. FOG LIGHT Relay
3. Fog Light Switch
4. Wire Harness
5. Body ECUBE±14
BE±27
BE±34
±
±
Fog light does not come on with light control switch is in HEAD
position.
(Headlight does not light).1.*1 Other Parts
2. Wire Harness±
±
Only one light does not come on.1. Bulb
2. Wire Harness±
±
*1: Inspect Headlight System
TURN SIGNAL AND HAZARD WARNING SYSTEM
SymptomSuspect AreaSee page
ºHazardº and ºTurnº do not light up.
1. GAUGE Fuse
2. TURN±HAZ Fuse
3. Ignition Switch
4. Turn Signal Flasher Relay
5. Wire HarnessBE±14
BE±14
BE±24
BE±24
±
Hazard warning light does not light up.
(Turn is normal)1. Hazard Warning Switch
2. Wire Harness
3. Turn Signal Flasher RelayBE±36
±
BE±36
Turn signal does not light up.
(Hazard is normal)1. Turn Signal Switch
2. Wire Harness
3. Turn Signal Flasher RelayBE±36
±
BE±36
Turn signal does not light up in one direction.1. Bulb
2. Wire Harness±
±
Only one bulb does not light up.1. Bulb
2. Wire Harness±
±
INTERIOR LIGHT SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
SymptomSuspect AreaSee page
All the interior lights do not come on.
1. DOME Fuse
2. Illumination Circuit
3. Body ECUBE±14
DI±1759
±

BE±6
± BODY ELECTRICALTROUBLESHOOTING
3410 Author: Date:
2005 SEQUOIA (RM1146U) The interior light does not come on when the driver's door is
opened.
1. Driver's Door Courtesy Light Switch
2. Wire Harness
3. Body ECUBE±40
±
±
The light does not come on when the passenger's door is opened.
1. Passenger's Door Courtesy Light Switch
2. Wire Harness
3. Body ECUBE±40
±
±
The light does not come on when the rear±right door is opened.
1. Rear±Right Door Courtesy Light Switch
2. Wire Harness
3. Body ECUBE±40
±
±
The light does not come on when the rear±left door is opened.
1. Rear±Left Door Courtesy Light Switch
2. Wire Harness
3. Body ECUBE±40
±
±
Only one of the bulbs comes on.Bulb±
The illumination does not fade out when all the doors are closed.1. Courtesy Light Switch
2. Body ECUBE±40
±
The illumination does not fade out immediately when all the doors
are locked within 15 seconds after they are closed.1. Door Unlock Detection Switch
2. Body ECUBE±79
±
Front personal light does not come on.
1. Bulb
2. Front Personal Light
3. Wire Harness±
BE±40
±
Room light does not come on.
1. Bulb
2. Room Light
3. Wire Harness±
BE±40
±
Vanity light does not come on.
1. Bulb
2. Vanity Light
3. Wire Harness±
BE±40
±
Luggage Room light does not come on.
1. Bulb
2. Back Door Courtesy Light Switch
3. Body ECU±
BE±40
±
Courtesy light does not come on.
1. Bulb
2. Door Courtesy Light Switch
3. Body ECU±
BE±40
±
Does not operate the illuminated entry1. Illumination Circuit
2. Body ECUDI±1759
±
All functions of the body control system do not operate.1. Power Source Circuit
2. Body ECUDI±1700
±
BACK±UP LIGHT SYSTEM
SymptomSuspect AreaSee page
Back±Up Light does not come on.
1. Bulb
2. GAUGE Fuse
3. BACK±UP LIGHT Relay
4. Instrument Panel J/B (IPO) Circuit
5. Ignition Switch
6. Wire Harness±
BE±14
BE±45
BE±20
BE±24
±
Back±Up Light always remains on.
1. Park/Neutral Position Switch
2. BACK±UP LIGHT Relay
3. Wire HarnessDI±576
BE±45
±
Only one light does not come on.1. Bulb
2. Wire Harness±
±

BE±8
± BODY ELECTRICALTROUBLESHOOTING
3412 Author: Date:
2005 SEQUOIA (RM1146U)
DEFOGGER SYSTEM
SymptomSuspect AreaSee page
Rear window defogger does not operate.
1. HTR Fuse
2. DEFOG Fuse
3. DEFOG Relay
4. Defogger Switch (in A/C Panel Switch)
5. Defogger Wire
6. Wire HarnessBE±14
BE±14
BE±14
BE±65
BE±65
±
Mirror defogger does not operate.
1. MIR±HTR Fuse
2. HTR Fuse
3. Mirror Heater Relay
4. Mirror Heater
5. Wire HarnessBE±14
BE±14
BE±65
BE±65
±
POWER WINDOW CONTROL SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
SymptomSuspect AreaSee page
All the power windows do not operate.
(Power door lock system is normal.)
1. POWER MAIN Relay
2. Driver Door ECU (Power Window Master Switch)
3. Body ECU
4. Wire HarnessBE±69
DI±1788
±
±
Only the driver's window does not operate.
1. Power Window Motor
2. Power Window Pulse Sensor Circuit
3. Power Window Limit Switch Circuit
4. Driver Door ECU (Power Window Master Switch)BE±69
DI±1803
DI±1800
±
ºWindow lock functionº does not operate.Driver Door ECU (Power Window Master Switch)BE±69
Only the rear LH window does not operate.
1. Power Window Motor
2. Power Window Switch
3. Body ECUBE±69
BE±69
±
Only the rear RH window does not operate.
1. Power Window Motor
2. Power Window Switch
3. Body ECUBE±69
BE±69
±
Only the front passenger's window does not operate.
1. Power Window Motor
2. Power Window Pulse Sensor Circuit
3. Power Window Limit Switch Circuit
4. Passenger Door ECUBE±69
DI±1841
DI±1838
±
The Key related power window operations do not operate with
driver side door key cylinder.
(Master switch operation is normal.)1. Door Key Lock and Unlock Switch Circuit
2. Driver Door ECU (Power Window Master Switch)DI±1791
±
º Auto up º or º Auto down º does not operate. *1
1. Power Window Pulse Sensor Circuit
2. Power Window Limit Switch Circuit
3. Driver Door ECU (Power Window Master Switch)DI±1803
DI±1800
±
*1: º Auto up º or º Auto down º may not function when the manual switch is pressed and held for 2 sec. or
more with the window glass fully open or closed. In this case, by performing a sequence of the window glass
operations (full open, fully close and then half open), the function can be restored. If not, replace the driver
door ECU or passenger door ECU.

± BODY ELECTRICALTROUBLESHOOTING
BE±9
3413 Author: Date:
2005 SEQUOIA (RM1146U)
POWER DOOR LOCK CONTROL SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
SymptomSuspect AreaSee page
All the doors cannot be locked or unlocked.
(Power window control system is normal.)1. Door Unlock Detection Switch
2. Door Key Lock and Unlock Switch
3. Driver Door ECUBE±79
BE±79
±
Only one back lock control does not operate.
1. Back Door Lock Motor
2. Back Door Unlock Detection Switch
3. Back Door Key Lock and Unlock Switch
4. Back Door ECUBE±79
BE±79
BE±79
±
Driver door key related function does not operate.1. Door Key Lock and Unlock Switch
2. Driver Door ECUBE±79
±
Front passenger door key related function does not operate.1. Door Key Lock and Unlock Switch
2. Passenger Door ECUBE±79
±
Back door key related function does not operate.1. Door Key Lock and Unlock Switch
2. Back Door ECUBE±79
±
THEFT DETERRENT SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
SymptomSuspect AreaSee page
The theft deterrent system cannot be set.
1. Key Unlock Warning Switch Circuit
2. Door Unlock Detection Switch Circuit (Driver Door ECU)
Door Unlock Detection Switch Circuit (Passenger Door
ECU)
Door Unlock Detection Switch Circuit (Back Door ECU)
Door Unlock Detection Switch Circuit (Body ECU)
3. Engine Hood Courtesy Switch Circuit
4. Back Door Courtesy Light Switch
5. Courtesy Light Switch Circuit
6. Glass Breakage Sensor Circuit (*1)
7. Body ECUDI±1715
DI±1791
DI±1829
DI±1869
DI±1723
DI±1725
DI±1864
DI±1728
DI±1774
±
The system cannot be canceled when the ignition switch is turned
ON with a key.
1. AM1 Fuse
2. AM2 Fuse
3. Key Unlock Warning Switch Circuit
4. Ignition Switch
5. Body ECUBE±14
BE±14
DI±1715
BE±24
±
The system cannot be canceled when the back door is unlocked
with a key.
1. Back Door Unlock Detection Switch Circuit
2. Back Door Key Lock and Unlock Switch Circuit
3. Back door ECU
4. Body ECUDI±1869
DI±1882
±
±
The system does not operate when the engine hood is opened.1. Engine Hood Courtesy Switch Circuit
2. Body ECUDI±1725
±
Some of the system does not operate.
(Headlight does not come on.)
1. Bulb
2. HEAD Relay
3. DIMMER Relay
4. DRL No. 4 Relay
5. Headlight Dimmer Switch
6. Light Control Switch
7. Wire Harness
8. Body ECU±
BE±27
BE±27
BE±27
BE±27
BE±27
±
±