key TOYOTA SEQUOIA 2001 Service Service Manual

DI±1594
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
1788 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check whether the engine can be started with a spare key of the same vehicle.
YES Replace key.
NO
2 Check harness and connector between transponder key ECU and ECM (See
page IN±35).
NG Repair or replace harness or connector.
OK
3 Does the system operate normally after replacement of transponder key ECU?
YES Replace transponder key ECU.
NO
Replace ECM (See page IN±35).

I24831
Transponder Key ECU
Sub J/B No. 3
+B
J43
J/C
51
O
BatteryF10
FL BlockW±R
B
4
IG BEngine Room J/B W±R32
1J
1E Instrument Panel J/B
A
AGND O14
T16 T16 1
2
W±R
3A 3B
81
2C
2D ECU±B
SHORT PIN
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI±1595
1789 Author: Date:
2005 SEQUOIA (RM1146U)
Power source circuit
CIRCUIT DESCRIPTION
This circuit provides power to operate the transponder key ECU.
WIRING DIAGRAM
DI7TO±07

DI±1596
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
1790 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check ECU±B fuse.
CHECK:
Check for continuity of the ECU±B fuse.
OK:
Continuity
NG Replace fuse.
OK
2 Check voltage between terminals +B and GND of transponder key ECU connec-
tor.
PREPARATION:
(a) Turn the ignition switch OFF.
(b) Disconnect the transponder key ECU connector.
CHECK:
Measure the voltage between terminals +B and GND.
OK:
Voltage: 10 to 14 V
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±1573).
NG
3 Check wire harness and connector between terminal GND of transponder key
ECU and body ground (See page IN±35).
NG Repair or replace wire harness or connector.
OK
Check and repair wire harness and connec-
tor between transponder key ECU and bat-
tery.

I24835
Instrument Panel J/B
6 9
BR
1F 1D W±B
A
IEJ8
J/C12
C6C516
LG±B7
T16IND Combination MeterTransponder Key ECU
Security
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI±1597
1791 Author: Date:
2005 SEQUOIA (RM1146U)
Security Indicator Light Circuit
CIRCUIT DESCRIPTION
When the transponder key is registered, the transponder key ECU outputs the key registration condition by
illuminating, blinking or turning off the security indicator.
WIRING DIAGRAM
DIABJ±03

I24836
ON
IND
(±) (+)
DI±1598
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
1792 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check voltage between terminal IND of transponder key ECU connector and
body ground.
PREPARATION:
Turn the ignition switch to the ON position and enter diagnosis
mode.
CHECK:
Measure the voltage between terminal IND of the transponder
key ECU connector and body ground when the security indica-
tor light is on and when it is off.
OK:
Indicator lightVoltage
ON3 to 6 V
OFFBelow 1 V
NG Proceed to next circuit inspection shown in
problem symptoms table (See page DI±1573).
OK
2 Check combination meter (See page DI±1610).
NG Replace combination meter.
OK
Check and replace wire harness and connec-
tor (See page IN±35).

I24837
IGTransponder Key ECU
D 3
T16
OJ43
J/C W±L
8 OP3 D6
DLC3
CG
4A
AO
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI±1599
1793 Author: Date:
2005 SEQUOIA (RM1146U)
Diagnosis Circuit
CIRCUIT DESCRIPTION
This circuit sends a signal to the ECU that outputs DTCs.
WIRING DIAGRAM
DIABK±03

A04550
CGOP3
1 234 5 678
91011 13 151612 14
DI±1600
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
1794 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check voltage between terminals OP3 and CG of DLC3.
PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals OP3 and CG of the
DLC3.
OK:
Voltage: 10 to 14 V
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±1573).
NG
2 Check harness and connector between transponder key ECU and DLC3, DLC3
and body ground (See page IN±35).
NG Repair or replace harness or connector.
OK
Replace transponder key ECU
(See page IN±35).

DID8P±01
I28566
Seat Position
Control ECU
A/C ECU (Integration
Control Panel) BEANBody ECU
Back Door ECU
ECM
Light Control
Rheostat
Vehicle Speed
Sensor
Oil Pressure
Sender Gauge
Fuel Sender Gauge
Seat Inner
Belt Switch
Park/neutral
Position Switch
Turn Signal
Flasher Relay
Washer Level SensorKey Unlock
Warning Switch
Door Courtesy
Lamp Switch
Parking Brake Switch
Transponder
Key ECU
4WD Control ECU
Airbag Sensor
Center ECU Combination
Meter
Skid Control ECU
Suspension
Control ECU
Translate ECU
Overhead Module
(Garage Door
Opener)BEAN
BEAN
BEAN
BEAN
BEAN BEAN
± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1605
1799 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DIAGRAM

DID8Q±01
DI±1608
± DIAGNOSTICSCOMBINATION METER SYSTEM
1802 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DESCRIPTION
1. METER GAUGE AND WARNING/INDICATOR
GAUGE:
ItemDetail
SpeedometerVehicle speed sensor (Direct line).
TachometerECM transmits engine speed to the meter to display.
ODO/TRIP MeterCombination meter assy.
FuelDisplays a fuel level according to a signal from the fuel sender gauge (Direct line).
Water TemperatureDisplays engine coolant temperature according to a signal from the ECM (BEAN).
Oil PressureReceives a signal from the oil pressure sender (Direct line).
Volt MeterDisplays vehicle voltage according to a voltage from the IG terminal (Direct line).
WARNING/INDICATOR:
HINT:
Combination meter bulb check is performed for 3 seconds after the ignition switch is turned ON.
ItemDetailList of indicators available for
bulb check
O/D OFFReceives a signal from the ECM (Direct line)±
TURNTurns signal switch ON (Direct line)±
BEAMReceives a signal from the body ECU (*1), Displays a signal received from the
dimmer switch (*2) (Direct line)±
SECURITYReceives a set signal from the transponder key ECU and body ECU (Direct line)±
CHARGEReceives a malfunction signal from the alternator (Direct line)
AIR BAGReceives a malfunction signal from the airbag sensor center (Direct line)
D SEAT BELTReceives the driver seat belt signal (Unfastened) from the seat belt inner front LH
(Direct line)±
DOOROpen door indicator comes on when a signal is received from the ECU (BEAN)
from each door±
A/T OIL TEMP.Warning is displayed when the oil temperature is high (Direct line)
BRAKEComes on when the parking brake switch is on or the brake fluid level warning
switch is on (Direct line)
MIL (CHECK ENGINE)Receives a malfunction signal from the ECM (Direct line)
FUEL WARNINGReceives the fuel empty signal from the fuel sender gauge (Direct line)±
ABSReceives a malfunction signal from the skid control ECU (Direct line)
WASHERWarning is displayed when the washer level is low (Direct line)±
CRUISEReceives a CRUISE on signal or malfunction signal from the ECM (Direct line)±
VSC TRACReceives a malfunction signal from the skid control ECU (Direct line)
VSC (TRAC) OFFReceives a malfunction signal from the translate ECU (Direct line)
SLIPReceives a malfunction signal from the translate ECU (Direct line)
4HIReceives a 4HI signal from the 4WD control ECU (Direct line)±
CTR DIF LOCKReceives a DIF LOCK signal from the 4WD control ECU (Direct line)±
A/T PReceives a P signal from the park/neutral position switch (Direct line)±
A/T NReceives an N signal from the park/neutral position switch (Direct line)±
A/T DReceives a D signal from the park/neutral position switch (Direct line)±
A/T 3Receives a 3 signal from the park/neutral position switch (Direct line)±
A/T 2Receives a 2 signal from the park/neutral position switch (Direct line)±
A/T LReceives an L signal from the park/neutral position switch (Direct line)±

± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1609
1803 Author: Date:
2005 SEQUOIA (RM1146U)A/T R
Receives an R signal from the park/neutral position switch (Direct line)±
TAIL/HEADReceives a dimmer signal from the body ECU (BEAN)±
TIRE PRESSUREReceives a low tire pressure signal from the tire pressure monitor ECU (Direct line)
4LOReceives a 4LO signal from the 4WD control ECU (Direct line)±
MAIN REQD (Blinks)Blinks when 4,500 miles have been traveled, after ODO/TRIP switch is set (Direct
line)
MAIN REQD (Comes on)Blinks when 5,000 miles have been traveled, after ODO/TRIP switch is set (Direct
line)
RSCA OFFReceives an RSCA OFF signal from the airbag sensor center (Direct line)
HIReceives a suspension position HI signal from the suspension control ECU (Direct
line)
NReceives a suspension position N signal from the suspension control ECU (Direct
line)
LOReceives a suspension position LO signal from the suspension control ECU (Direct
line)
AHC MAN.Receives a suspension control manual signal from the suspension control ECU
(Direct line)
*1: w/ Day time running light
*2: w/o Day time running light
BUZZER:
ItemDetail
Key ReminderBuzzer is ON: Ignition switch is OFF, key is inserted, and door is open.
Fasten BeltBuzzer is ON: Ignition switch is ON and seat belt is unfastened.
2. COMBINATION METER IN SEQUOIA HAS THE FOLLOWING FEATURES:
(a) Built±in buzzer for the reminder system (key and seat belt)
(b) Integrated trip and odometer knobs

Press and release knob to scroll through trip ºAº, trip ºBº, and odometer features.

Press and hold the trip knob to reset trip meter functions.
(c) Oil maintenance indicator

When 4,500 miles have been traveled, after the ODO/TRIP switch is set, the maintenance indica-
tor begins to blink for 15 seconds after the ignition switch is turned to the ON position.

When 5,000 miles have been traveled, after the ODO/TRIP switch is set, the maintenance indica-
tor comes on.

Press and hold the trip knob to reset the oil maintenance indicator.
(d) Rotate knob to adjust interior illumination