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
–
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)
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ABS
Receives a malfunction signal from the skid control ECU (Direct line)
WASHER
Warning is displayed when the washer level is low (Direct line)
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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)
–
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)
–
A/T N
Receives an N signal from the park/neutral position switch (Direct line)
–
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)
–
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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
NEXT
3
Check Multiplex Communication System (See page
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
))
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
NEXT
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