Toyota Sequoia (2005). Manual - part 453

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DIAGNOSTICS

COMBINATION METER SYSTEM

DI–1607

1801

Driver door control ECU

Combination meter

Body control ECU

Passenger door control ECU

Seat control ECU

Sliding roof control ECU

Back door ECU

Driver door control ECU activation

signal

BEAN

Passenger door control ECU

Combination meter

Body control ECU

Driver door control ECU

Seat control ECU

Sliding roof control ECU

Back door ECU

Passenger door control ECU ac-

tivation signal

BEAN

Sliding roof control ECU

Combination meter

Body control ECU

Driver door control ECU

Passenger door control ECU

Back door ECU

Sliding roof control ECU

 

activation

signal

BEAN

Seat control ECU

Combination meter

Body control ECU

Driver door control ECU

Passenger door control ECU

Seat control ECU

 

activation signal

BEAN

Back door ECU

Combination meter

Body control ECU

Driver door control ECU

Passenger door control ECU

Seat control ECU

Back door control ECU

 

activation

signal

BEAN

A/C ECU

Combination meter

Driver door control ECU

Passenger door control ECU

Seat control ECU

Sliding roof control ECU

Back door ECU

Back door ECU

Diagnosis tool answer signal

BEAN

DID8Q–01

DI–1608

–

DIAGNOSTICS

COMBINATION METER SYSTEM

1802

SYSTEM DESCRIPTION

1.

METER GAUGE AND WARNING/INDICATOR

GAUGE:

Item

Detail

Speedometer

Vehicle speed sensor (Direct line).

Tachometer

ECM transmits engine speed to the meter to display.

ODO/TRIP Meter

Combination meter assy.

Fuel

Displays a fuel level according to a signal from the fuel sender gauge (Direct line).

Water Temperature

Displays engine coolant temperature according to a signal from the ECM (BEAN).

Oil Pressure

Receives a signal from the oil pressure sender (Direct line).

Volt Meter

Displays 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.

Item

Detail

List of indicators available for

bulb check

O/D OFF

Receives a signal from the ECM (Direct line)

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TURN

Turns signal switch ON (Direct line)

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BEAM

Receives a signal from the body ECU (*1), Displays a signal received from the

dimmer switch (*2) (Direct line)

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SECURITY

Receives a set signal from the transponder key ECU and body ECU (Direct line)

–

CHARGE

Receives a malfunction signal from the alternator (Direct line)



AIR BAG

Receives a malfunction signal from the airbag sensor center (Direct line)



D SEAT BELT

Receives the driver seat belt signal (Unfastened) from the seat belt inner front LH

(Direct line)

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DOOR

Open door indicator comes on when a signal is received from the ECU (BEAN)

from each door

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A/T OIL TEMP.

Warning is displayed when the oil temperature is high (Direct line)



BRAKE

Comes 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 WARNING

Receives the fuel empty signal from the fuel sender gauge (Direct line)

–

ABS

Receives a malfunction signal from the skid control ECU (Direct line)



WASHER

Warning is displayed when the washer level is low (Direct line)

–

CRUISE

Receives a CRUISE on signal or malfunction signal from the ECM (Direct line)

–

VSC TRAC

Receives a malfunction signal from the skid control ECU (Direct line)



VSC (TRAC) OFF

Receives a malfunction signal from the translate ECU (Direct line)



SLIP

Receives a malfunction signal from the translate ECU (Direct line)



4HI

Receives a 4HI signal from the 4WD control ECU (Direct line)

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CTR DIF LOCK

Receives a DIF LOCK signal from the 4WD control ECU (Direct line)

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A/T P

Receives a P signal from the park/neutral position switch (Direct line)

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A/T N

Receives an N signal from the park/neutral position switch (Direct line)

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A/T D

Receives a D signal from the park/neutral position switch (Direct line)

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A/T 3

Receives a 3 signal from the park/neutral position switch (Direct line)

–

A/T 2

Receives a 2 signal from the park/neutral position switch (Direct line)

–

A/T L

Receives an L signal from the park/neutral position switch (Direct line)

–

–

DIAGNOSTICS

COMBINATION METER SYSTEM

DI–1609

1803

A/T R

Receives an R signal from the park/neutral position switch (Direct line)

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TAIL/HEAD

Receives a dimmer signal from the body ECU (BEAN)

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TIRE PRESSURE

Receives a low tire pressure signal from the tire pressure monitor ECU (Direct line)



4LO

Receives a 4LO signal from the 4WD control ECU (Direct line)

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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 OFF

Receives an RSCA OFF signal from the airbag sensor center (Direct line)



HI

Receives a suspension position HI signal from the suspension control ECU (Direct

line)



N

Receives a suspension position N signal from the suspension control ECU (Direct

line)



LO

Receives 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:

Item

Detail

Key Reminder

Buzzer is ON: Ignition switch is OFF, key is inserted, and door is open.

Fasten Belt

Buzzer 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 ”A”, trip ”B”, 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

DID8R–01

DI–1610

–

DIAGNOSTICS

COMBINATION METER SYSTEM

1804

HOW TO PROCEED WITH TROUBLESHOOTING

1

Vehicle Brought To Workshop

NEXT

2

Customer Problem Analysis (See page 

DI–1612

)

NEXT

3

Check Multiplex Communication System (See page 

DI–1904

)

Check if any DTCs are output.
HINT:
The combination meter of this system is connected to the multiplex communication system. Therefore, be-
fore starting troubleshooting, make sure to check that there is no trouble in the multiplex communication sys-
tem.

Multiplex Communication System DTC Is Out-
put (Proceed To ”MULTIPLEX COMMUNICA-
TION SYSTEM” (See page 

DI–1892

))

No Multiplex Communication System DTC (Go
to step 4)

4

Problem Symptom Confirmation

Symptom Does Not Occur (Go to step 5)

Symptom Occurs (Go to step 6)

5

Symptom Simulation (See page 

DI–1892

)

NEXT