oil pressure TOYOTA SEQUOIA 2001 Service Owner's Manual

I28825
Engine Coolant Temperature Sender Gauge
Oil Pressure Sender DI±1604
± DIAGNOSTICSCOMBINATION METER SYSTEM
1798 Author: Date:
2005 SEQUOIA (RM1146U)

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

DID8S±01
/ /
/ /
COMBINATION METER SYSTEM Check Sheet
Inspector 's name:
Customer 's NameVIN
Production Date
Licence Plate No.
Date Vehicle
Brought InOdometer Readingkm
miles
Weather Conditions
When Problem
OccurredFrequency Problem Occurs
Weather
Outside temperature Constantly  Sometimes ( times per day, month)
 Once only Date Problem First Occurred
 Fine  Cloudy  Rainy  Snowy
 Various/Others
 Hot  Warm  Cool
 Cold (Approx. 5F ( 5C))
Problem Symptom
Gauge

Malfunction in speedometer

Malfunction in tachometer

Malfunction in engine coolant temperature receiver gauge

Malfunction in fuel receiver gauge

Entire combination meter does not operate

Buzzer does not sound (Key reminder warning, Seat belt warning)

Seat belt warning for driver's seat does not operate
Others

Operating light control rheostat does not change light brightness

















Malfunction in oil pressure receiver gauge

Malfunction in volt meter DI±1612
± DIAGNOSTICSCOMBINATION METER SYSTEM
1806 Author: Date:
2005 SEQUOIA (RM1146U)
CUSTOMER PROBLEM ANALYSIS CHECK

DID8U±01
DI±1614
± DIAGNOSTICSCOMBINATION METER SYSTEM
1808 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
HINT:
Inspect the related ºFuseº and ºRelayº before confirming the suspected area as shown in the table below.
MALFUNCTION SYSTEM:
SymptomSuspected AreaSee page
Entire combination meter does not operate.Refer to troubleshooting proceduresDI±1628
Operating light control rheostat does not change light brightness.Refer to troubleshooting proceduresDI±1645
Seat belt warning does not operate.Refer to troubleshooting proceduresDI±1650
Key reminder warning buzzer does not sound.
1. Multiplex communication system
2. Key unlock warning switch circuit
3. Door courtesy lamp switch circuit
4. Combination meter assyDI±1892
DI±1715
DI±1728
IN±35
METER GAUGES:
SymptomSuspected AreaSee page
Malfunction in speedometerRefer to troubleshooting proceduresDI±1632
Malfunction in tachometerRefer to troubleshooting proceduresDI±1636
Malfunction in fuel receiver gaugeRefer to troubleshooting proceduresDI±1640
Malfunction in engine coolant temperature receiver gaugeRefer to troubleshooting proceduresDI±1644
Malfunction in oil pressure receiver gaugeRefer to troubleshooting proceduresDI±1654
Malfunction in volt meterRefer to troubleshooting proceduresDI±1658
WARNING LIGHTS:
SymptomSuspected AreaSee page
Check engine warning light (MIL) does not come on.
1. ECM
2. Wire harness or connector
3. Combination meter assyDI±9
±
IN±35
Discharge warning light does not come on.
1. ECM
2. Wire harness or connector
3. Combination meter assyDI±9
±
IN±35
Brake warning light does not come on.
1. Skid control ECU
2. Wire harness or connector
3. Combination meter assyDI±895
±
IN±35
ABS warning light does not come on.
1. Skid control ECU
2. Wire harness or connector
3. Combination meter assyDI±895
±
IN±35
SRS warning light does not come on.
1. Airbag sensor assy
2. Wire harness or connector
3. Combination meter assyDI±1126
±
IN±35
Open door warning light does not come on.
1. Door courtesy light switch circuit
2. Wire harness or connector
3. Combination meter assy
4. Body ECUDI±1728
±
IN±35
IN±35
Fuel level warning light does not come on.
1. Refer to troubleshooting
2. Wire harness or connector
3. Combination meter assyDI±1640
±
IN±35
Low oil pressure warning light does not come on.
1. Low oil pressure warning switch
2. Wire harness or connector
3. Combination meter assyBE±55
±
IN±35

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

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

Wire harness side
1
2
3
4
5
6
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
401
2
3
4
5
8 6
10
11
12
13
14
15
16
17
18
19
21
23
24
Terminal No.
Translate ECU
ECM
STA Fuse
Front Seat Inner Belt LH (Buckle Switch)
Overhead Module (Garage Door Opener)
Overhead Module (Garage Door Opener)
Washer Level Sensor
ECM
ECM (*1)
Transponder Key Computer
Body ECU
ECM
ECM
Tire Pressure Monitor ECU
Injector No. 1
Light Control Rheostat
ECM
Speed Sensor
4P OUT (Other Parts)
Fuel Sender Gauge
Oil Pressure Sender Gauge
IGN Fuse
Airbag Sensor Assembly
Memory Seat ECU and SW (*2)
Back Door ECU
Integration Control and Panel
Turn Signal Flasher Relay
Park/Neutral Position Switch
Airbag Sensor AssemblyTranslate ECU
Translate ECU
Skid Control ECU
4WD Control ECU
Alternator
Speed Sensor
Fuel Sender Gauge
Ground
Suspension Control ECU
Body ECU (*4)
Body ECU (*3)
Turn Signal Flasher Relay
Skid Control ECU
ECU±B Fuse
IGN1 Fuse Connectors:
Terminal No.
Wire harness side
C5
C64WD Control ECU
4WD Control ECU
Suspension Control ECU
Suspension Control ECU
Suspension Control ECU
*1: 4WD
*2: w/ Driving Position Memory
*3: w/ Daytime Running Light
*4: w/o Daytime Running LightPark/Neutral Position Switch
Park/Neutral Position Switch
Park/Neutral Position Switch
Park/Neutral Position Switch
Park/Neutral Position Switch DI±1624
± DIAGNOSTICSCOMBINATION METER SYSTEM
1818 Author: Date:
2005 SEQUOIA (RM1146U)

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