2001 TOYOTA SEQUOIA engine

± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1617
1811 Author: Date:
2005 SEQUOIA (RM1146U)
(c) Reconnect the C5 and C6 connectors.
(d) Measure the voltage of each terminal of the wire harness side connector.
Standard:
Terminals No.Wiring ColorTerminal DescriptionConditionSpecified Condition
C5±1 ± Body groundR±B ± Body
groundParking brake signalParking brake warning light ON6.7 to 12 V
C5±1 ± Body groundR±B ± Body
groundParking brake signalParking brake warning light OFFBelow 1 V
C5±2 ± Body groundLG±R ± Body
groundCRUISE signalCRUISE indicator light ONBelow 1 V
C5±2 ± Body groundLG±R ± Body
groundCRUISE signalCRUISE indicator light OFF10 to 14 V
C5±3 ± Body groundB ± Body groundIgnition switch signal
(Start)Ignition switch OFFBelow 1 V
C5±3 ± Body groundB ± Body groundIgnition switch signal
(Start)Ignition switch START10 to 14 V
C5±4 ± Body groundG±Y ± Body
groundSeat belt condition signal
(Driver side)D±BELT indicator light ONBelow 1 V
C5±4 ± Body groundG±Y ± Body
groundSeat belt condition signal
(Driver side)D±BELT indicator light OFF10 to 14 V
C5±13 ± Body groundLG±R ± Body
groundWasher level signalWASH LVL indicator light ONBelow 1 V
C5±13 ± Body groundLG±R ± Body
groundWasher level signalWASH LVL indicator light OFF10 to 14 V
C5±14 ± Body groundL±O ± Body
groundO/D OFF indicator signalO/D OFF indicator light ONBelow 1 V
C5±14 ± Body groundL±O ± Body
groundO/D OFF indicator signalO/D OFF indicator light OFF10 to 14 V
C5±15 (*1) ± Body groundY±R ± Body
groundA/T oil temperature signalA/T OIL TEMP. warning light ONBelow 1 V
C5±15 (*1) ± Body groundY±R ± Body
groundA/T oil temperature signalA/T OIL TEMP. warning light OFF10 to 14 V
C5±16 ± Body groundLG±B ± Body
groundSecurity indicator light
signal (Engine immobilizer
system)
Security indicator light ON10 to 14 V
C5±16 ± Body groundLG±B ± Body
groundSecurity indicator light
signal (Engine immobilizer
system)
Security indicator light OFFBelow 1 V
C5±17 ± Body groundGR ± Body
groundSecurity indicator light
signal (Theft deterrent
system)
Security indicator light ON10 to 14 V
C5±17 ± Body groundGR ± Body
groundSecurity indicator light
signal (Theft deterrent
system)
Security indicator light OFFBelow 1 V
C5±18 ± Body groundV±W ± Body
groundCHECK ENGINE signalCHECK ENGINE warning light ONBelow 1 V
C5±18 ± Body groundV±W ± Body
groundCHECK ENGINE signalCHECK ENGINE warning light OFF10 to 14 V
C5±19 ± Body groundG±B ± Body
groundA/T shift position signal
(L)A/T L indicator OFFBelow 1 V

DI±1618
± DIAGNOSTICSCOMBINATION METER SYSTEM
1812 Author: Date:
2005 SEQUOIA (RM1146U) C5±19 ± Body ground
G±B ± Body
groundA/T shift position signal
(L)A/T L indicator ON10 to 14 V
C5±20 ± Body groundGR±L ± Body
groundTire pressure signalTire pressure warning light ON6.7 to 12 V
C5±20 ± Body groundGR±L ± Body
groundTire pressure signalTire pressure warning light OFFBelow 1 V
C5±21 ± Body groundR ± Body groundInjector signalIgnition switch ONPulse generation
C5±22 ± Body groundW±G ± Body
groundIllumination signalLight control switch OFFBelow 1 V
C5±22 ± Body groundW±G ± Body
groundIllumination signalLight control switch ON10 to 14 V
C5±23 ± Body groundY±G ± Body
groundTachometer signalEngine runningPulse generation
(see waveform 1)
C5±24 ± Body groundY ± Body groundSpeed signal (Input)Ignition switch ON and turn the
wheel slowly10 to 14 V e
Below 1 V
C5±25 ± Body groundG±O ± Body
groundSpeed signal (Output)Ignition switch ON and turn the
wheel slowlyPulse generation
(see waveform 2)
C5±26 ± Body groundV ± Body groundPower source for fuel
sender gaugeIgnition switch ON, fuel level is
FULLBelow 1 V
C5±26 ± Body groundV ± Body groundPower source for fuel
sender gaugeIgnition switch ON, fuel level is
EMPTY4 to 7 V
C5±27 ± Body groundL±B ± Body
groundOil pressure signalOil pressure warning light ONBelow 1 V
C5±27 ± Body groundL±B ± Body
groundOil pressure signalOil pressure warning light OFF10 to 14 V
C5±28 ± Body groundB±R ± Body
groundInjector power signalIgnition switch ON10 to 14 V
C5±29 ± Body groundB±Y ± Body
groundSRS warning light signalSRS warning light ONBelow 1 V
C5±29 ± Body groundB±Y ± Body
groundSRS warning light signalSRS warning light OFF8 to 14 V
C5±33 ± Body groundG±Y ± Body
groundTurn signal (R)Ignition switch ON, turn signal RH
indicator OFFBelow 1 V
C5±33 ± Body groundG±Y ± Body
groundTurn signal (R)Ignition switch ON, turn signal RH
indicator ON10 to 14 V
C5±34 ± Body groundL±Y ± Body
groundA/T shift position signal
(P)A/T P indicator OFFBelow 1 V
C5±34 ± Body groundL±Y ± Body
groundA/T shift position signal
(P)A/T P indicator ON10 to 14 V
C5±35 ± Body groundB±Y ± Body
groundA/T shift position signal
(R)A/T R indicator OFFBelow 1 V
C5±35 ± Body groundB±Y ± Body
groundA/T shift position signal
(R)A/T R indicator ON10 to 14 V
C5±36 ± Body groundG±R ± Body
groundA/T shift position signal
(N)A/T N indicator OFFBelow 1 V
C5±36 ± Body groundG±R ± Body
groundA/T shift position signal
(N)A/T N indicator ON10 to 14 V
C5±37 ± Body groundW±R ± Body
groundA/T shift position signal
(D)A/T D indicator OFFBelow 1 V

± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1619
1813 Author: Date:
2005 SEQUOIA (RM1146U) C5±37 ± Body ground
W±R ± Body
groundA/T shift position signal
(D)A/T D indicator ON10 to 14 V
C5±38 ± Body groundL ± Body groundA/T shift position signal
(3)A/T 3 indicator OFFBelow 1 V
C5±38 ± Body groundL ± Body groundA/T shift position signal
(3)A/T 3 indicator ON10 to 14 V
C5±39 ± Body groundLG ± Body
groundA/T shift position signal
(2)A/T 2 indicator OFFBelow 1 V
C5±39 ± Body groundLG ± Body
groundA/T shift position signal
(2)A/T 2 indicator ON10 to 14 V
C5±40 ± Body groundB±R ± Body
groundRSCA OFF signalRSCA OFF indicator light OFFBelow 1 V
C5±40 ± Body groundB±R ± Body
groundRSCA OFF signalRSCA OFF indicator light ON8 to 14 V
C6±1 ± Body groundW±R ± Body
groundSLIP signalSLIP indicator light ONBelow 1 V
C6±1 ± Body groundW±R ± Body
groundSLIP signalSLIP indicator light OFF10 to 14 V
C6±2 ± Body groundR±G ± Body
groundVSC OFF signal (*1)
TRAC OFF signal (*5)VSC OFF indicator light ON (*1)
TRAC OFF indicator light ON (*5)Below 1 V
C6±2 ± Body groundR±G ± Body
groundVSC OFF signal (*1)
TRAC OFF signal (*5)VSC OFF indicator light OFF (*1)
TRAC OFF indicator light OFF (*5)10 to 14 V
C6±3 ± Body groundP±L ± Body
groundTRAC signalVSC/TRAC indicator light ONBelow 1 V
C6±3 ± Body groundP±L ± Body
groundTRAC signalVSC/TRAC indicator light OFF10 to 14 V
C6±4 ± Body groundBR±Y ± Body
groundCTR DIFF LOCK signalCTR DIFF LOCK indicator light ONBelow 1 V
C6±4 ± Body groundBR±Y ± Body
groundCTR DIFF LOCK signalCTR DIFF LOCK indicator light OFF10 to 14 V
C6±5 ± Body groundY±B ± Body
ground4HI signal4HI indicator ONBelow 1 V
C6±5 ± Body groundY±B ± Body
ground4HI signal4HI indicator OFF10 to 14 V
C6±6 ± Body groundG±W ± Body
ground4LO signal4LO indicator ONBelow 1 V
C6±6 ± Body groundG±W ± Body
ground4LO signal4LO indicator OFF10 to 14 V
C6±8 ± Body groundY ± Body groundCharge signalEngine runningBelow 1 V
C6±8 ± Body groundY ± Body groundCharge signalEngine stopped10 to 14 V
C6±10 ± Body groundY±R ± Body
groundGround (Speed)AlwaysBelow 1 V
C6±11 ± Body groundY±B ± Body
groundGround (Fuel sender
gauge)AlwaysBelow 1 V
C6±12 ± Body groundBR ± Body
groundGroundAlwaysBelow 1 V
C6±13 ± Body groundLG ± Body
groundHeight control indicator
lamp signal (MAN.)Height control indicator lamp MAN.
Indicator light ONBelow 1 V
C6±13 ± Body groundLG ± Body
groundHeight control indicator
lamp signal (MAN.)Height control indicator lamp MAN.
Indicator light OFF10 to 14 V

I28567
GND DI±1620
± DIAGNOSTICSCOMBINATION METER SYSTEM
1814 Author: Date:
2005 SEQUOIA (RM1146U) C6±14 ± Body ground
P ± Body groundHeight control indicator
lamp signal (LO)Height control indicator lamp LO,
Indicator light ONBelow 1 V
C6±14 ± Body groundP ± Body groundHeight control indicator
lamp signal (LO)Height control indicator lamp LO,
Indicator light OFF10 to 14 V
C6±15 ± Body groundB±L ± Body
groundHeight control indicator
lamp signal (N)Height control indicator lamp N, In-
dicator light ONBelow 1 V
C6±15 ± Body groundB±L ± Body
groundHeight control indicator
lamp signal (N)Height control indicator lamp N, In-
dicator light OFF10 to 14 V
C6±16 ± Body groundGR±R ± Body
groundHeight control indicator
lamp signal (HI)Height control indicator lamp HI, In-
dicator light ONBelow 1 V
C6±16 ± Body groundGR±R ± Body
groundHeight control indicator
lamp signal (HI)Height control indicator lamp HI, In-
dicator light OFF10 to 14 V
C6±17 (*3) ± Body groundR±G ± Body
groundHi±Beam signalHi±Beam OFFBelow 1 V
C6±17 (*3) ± Body groundR±G ± Body
groundHi±Beam signalHi±Beam ON10 to 14 V
C6±18 (*4) ± Body groundGR±L ± Body
groundHi±Beam signalHi±Beam OFFBelow 1 V
C6±18 (*4) ± Body groundGR±L ± Body
groundHi±Beam signalHi±Beam ON10 to 14 V
C6±19 ± Body groundG±B ± Body
groundTurn signal (L)Ignition switch ON, turn signal LH
indicator OFFBelow 1 V
C6±19 ± Body groundG±B ± Body
groundTurn signal (L)Ignition switch ON, turn signal LH
indicator ON10 to 14 V
C6±21 ± Body groundR±W ± Body
groundABS signalABS warning light ON6.7 to 12 V
C6±21 ± Body groundR±W ± Body
groundABS signalABS warning light OFFBelow 1 V
C6±23 ± Body groundW±R ± Body
groundBatteryAlways10 to 14 V
C6±24 ± Body groundB±O ± Body
groundIgnition switch signal (ON)Ignition switch OFFBelow 1 V
C6±24 ± Body groundB±O ± Body
groundIgnition switch signal (ON)Ignition switch ON10 to 14 V
*1: 4WD
*2: w/ Driving position memory
*3: w/o Daytime running light
*4: w/ Daytime running light
*5: 2WD
Waveform 1 (Reference):
ConditionGauge set
Engine idle speed5 V/DIV, 10 ms/DIV

I27708
C5±31
C5±32
(*1) C5±30
C5±25
C5±24
C6±10
C5±23
C5±28
C5±21
C5±4
C5±29
C5±26
C6±11
C6±12
C5±22 C5±27
CPU
Supply CircuitC5±6
C5±5
C6±23
HEAD (*2)
OIL MAINT
DOOR
ILL
AIRBAG
D±BELT
FUEL WARNIG
C5±3
HI
N
LO
MAN.
BRAKE C6±16
C6±15
C6±14
C6±13
C5±1
*1: w/ Driving Position Memory *2: USA *3: Canada
TAIL (*3)
ONE STEP
DIMMER Buzzer
LCD
Speedometer
Tachometer
Fuel Gauge
Engine Coolant Temperature
Receiver Gauge
Oil Pressure Gauge
Volt Gauge DI±1622
± DIAGNOSTICSCOMBINATION METER SYSTEM
1816 Author: Date:
2005 SEQUOIA (RM1146U)
COMBINATION METER INNER CIRCUIT

DID8X±01
DI±1626
± DIAGNOSTICSCOMBINATION METER SYSTEM
1820 Author: Date:
2005 SEQUOIA (RM1146U)
DATA LIST / ACTIVE TEST
DATA LIST
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 part removal. Reading the DATA LIST as the first step of troubleshoot-
ing is one method to shorten labor time.
(a) Warm up the engine.
(b) Turn the ignition switch off.
(c) Connect the hand±held tester to the DLC3.
(d) Turn the ignition switch to the ON position.
(e) Operate the hand±held tester according to the steps on the display and select ºDATA LISTº.
METER:
ItemMeasurement Item /
Range (Display)Normal ConditionDiagnostic Note
SPEED METER
Vehicle Speed Meter /
Min.: 0 km/h (0 mph)
Max.: 255 km/h (158 mph)Almost the same as actual vehicle
speed (When driving)
TACHO METEREngine RPM /
Min.: 0 rpm Max.: 12,750 rpmAlmost the same as actual engine
speed (When engine is running)
FUEL GAUGEFuel Input /
Min.: 0 Max.: 255Tester indication changes accord-
ing to the fuel receiver gauge
angle.

LIGHT RHEOSTATLight Control Rheostat /
Min.: 0 Max.: 255Light control rheostat switch is
Dark (0) " Bright (255)
OIL GAUGEOil Gauge /
Min.: 0 Max.: 255Tester indication changes accord-
ing to the oil pressure receiver
gauge angle.

ODO/TRIP SWODO / TRIP
ODO/TRIP switch / ON/OFFON: Switch is pushed
OFF: Switch is released

± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1627
1821 Author: Date:
2005 SEQUOIA (RM1146U)
ACTIVE TEST
Performing the ACTIVE TEST using the hand±held tester allows the meters, indicators and so on to operate
without part removal. Performing the ACTIVE TEST as the first step of troubleshooting is one way to shorten
labor time.
It is possible to display the DATA LIST on the hand±held tester during the ACTIVE TEST.
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) From the display on the tester, perform the ºACTIVE TESTº.
METER:
ItemTest DetailsDiagnostic Note
SPEED METER
Operate speedometer: 0 / 40 (24) / 80 (48) / 120
(72) / 160 (96) /
200 (120) km/h (mph)The needle position should be within the accept-
able tolerance
TACHOMETER
Operate tachometer:
0 rpm / 1,000 rpm / 2,000 rpm / 3,000 rpm /
4,000 rpm / 5,000 rpm / 6,000 rpm / 7,000 rpmConfirm that the vehicle is stopped and engine is
idling.
FUEL GAUGEOperate fuel gauge: EMPTY, 1/2, FULLConfirm that the vehicle is stopped and engine is
idling.
COOLANT TEMPOperate engine coolant temperature receiver
gauge: HIGH / NORMAL / LOW (OFF)Confirm that the vehicle is stopped and engine is
idling.
D BELT REMINDOperate driver's seat belt warning light:
OFF / ONConfirm that the vehicle is stopped and engine is
idling.
OPEN DOOR WARNOperate open door warning light:
OFF / ONConfirm that the vehicle is stopped and engine is
idling.
LOW FUEL WARNOperate fuel level warning light:
OFF / ONConfirm that the vehicle is stopped and engine is
idling.
TAILLIGHT INDICOperate taillight indicator light:
OFF / ONConfirm that the vehicle is stopped and engine is
idling.
HEADLIGHT INDICOperate Hi±beam indicator light:
OFF / ONConfirm that the vehicle is stopped and engine is
idling.
SRS WARNOperate SRS warning light:
OFF / ONConfirm that the vehicle is stopped and engine is
idling.
ODO/TRIP DISPOperate ODO/TRIP display: OFF / ONConfirm that the vehicle is stopped and engine is
idling.
KEY REMND BUZZROperate key reminder buzzer: OFF / ONConfirm that the vehicle is stopped and engine is
idling.
SEAT BELT BUZZROperate driver's seat belt warning buzzer:
OFF / ONConfirm that the vehicle is stopped and engine is
idling.
MAINT REQDOperate oil maintenance indicator light:
OFF / ONConfirm that the vehicle is stopped and engine is
idling.
VOLT METEROperate volt meter: 9 V / 12 V / 15 V / 18VConfirm that the vehicle is stopped and engine is
idling.
OIL PRESS METEROperate oil pressure meter: HIGH, 3/4, 1/2, 1/4,
LOW (OFF)Confirm that the vehicle is stopped and engine is
idling.

DID8Y±01
DI±1628
± DIAGNOSTICSCOMBINATION METER SYSTEM
1822 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT INSPECTION
Entire combination meter does not operate
CIRCUIT DESCRIPTION
This is the power source circuit of the combination meter.
The combination meter uses BEAN to determine that the ignition switch is in the ACC position or not.
The ST terminal (C5±3) is used as an auxiliary power source to prevent voltage drop when the ignition switch
is ON. When the ST terminal circuit is open or shorted, the combination meter illumination may flicker when
cranking the engine.