Toyota Tundra Service Manual: System Description

SYSTEM DESCRIPTION

1. METER GAUGE AND WARNING INDICATOR

Meter/Gauge

Item

Details

Speedometer

Based on signal received from wheel speed sensor, skid control ECU calculates vehicle speed and transmits data to combination meter (CAN).

ODO/TRIP meter

  • Combination meter receives vehicle speed pulse integration signal from skid control ECU, and ODO/TRIP meter display operates (CAN).
  • Using ODO/TRIP switch, ODO/TRIP meter display changes.

Tachometer

Combination meter receives engine rpm signal from ECM, and gauge needle operates (CAN).

Engine coolant temperature gauge

Combination meter receives water temperature signal from ECM, and gauge needle operates (CAN).

Fuel receiver gauge

Combination meter receives fuel amount information measured by fuel sender gauge, and gauge needle operates (Direct line).

Voltage meter

Monitors IG voltage and gauge needle operates (Direct line).

Oil pressure receiver gauge

Combination meter receives engine rpm signal from ECM (CAN), and receives oil pressure sender signal from oil pressure sender (Direct line). Then meter measures signals and gauge needle operates.

Warning/Indicator

Item

Details

BEAM indicator light

Receives signal from main body ECU (CAN).

Front fog light indicator light

Receives signal from main body ECU (CAN).

SRS warning light

Receives malfunction signal from center airbag sensor (CAN).

Automatic high beam indicator light

Receives signal from main body ECU (CAN).

Driver side seat belt warning light

Receives driver seat belt signal (Unfastened) from main body ECU (CAN).

Brake warning light*1

  • Comes on when parking brake switch is ON (CAN).
  • Brake fluid level warning switch is ON (Direct line).
  • Vehicle stability control system is malfunctioning.

Brake warning light*2

Brake warning light*1

Receives signal from main body ECU (CAN).

Brake warning light*2

CHARGE warning light

Receives malfunction signal from generator (Direct line).

4LO indicator light*3

Receives 4LO signal from 4WD control ECU (CAN).

ABS warning light*1

Receives malfunction signal from skid control ECU (CAN).

ABS warning light*2

MIL*1

Receives malfunction signal from ECM (Direct line).

MIL*2

FUEL warning light

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

PCS OFF indicator light*6

Receives PCS OFF signal from steering pad switch (CAN).

SLIP indicator light

Receives malfunction signal from skid control ECU (CAN).

4HI indicator light*3

Receives 4HI signal from 4WD control ECU (CAN).

HEAD indicator light*1

Receives taillight or headlight signal from main body ECU (CAN).

TAIL indicator light*2

Receives taillight or headlight signal from main body ECU (CAN).

Turn signal indicator light (LH/RH)

Receives turn signal from FLASHER relay (Direct line).

AUTO LSD indicator light

Receives VSC OFF switch ON signal from skid control ECU (CAN).

VSC OFF indicator light

Receives VSC control off signal or VSC system fail-safe control signal from skid control ECU (CAN).

TRAC OFF indicator light

Receives VSC OFF switch ON signal from skid control ECU (CAN).

TOW HAUL indicator light*5

Receives towing indicator signal from ECM (CAN).

Tire pressure warning light

Receives low tire pressure signal from tire pressure warning ECU (Direct line).

CENTER DIFF. indicator light*3

Receives a DIFF. LOCK signal from 4WD control ECU (CAN).

EPS warning light

Receives malfunction signal from power steering ECU (CAN).

Master warning light

Receives warning signal from each ECU (CAN).

BSM indicator light*7

Receives BSM on signal from steering pad switch (CAN).

RCTA indicator light*7

Receives RCTA on signal from steering pad switch (CAN).

Security indicator light*4

Receives security warning light signal from transponder key ECU (Direct line)

Trailer connection indicator light*8

Receives trailer connection indicator signal from brake control with bracket relay (CAN)

A/T P shift position indicator

Receives P signal from ECM (Direct line).

A/T R shift position indicator

Receives R signal from ECM (Direct line).

A/T N shift position indicator

Receives N signal from ECM (Direct line).

A/T D shift position indicator

Receives D signal from ECM (Direct line).

A/T S shift position indicator

Receives S signal from ECM (Direct line).

  • *1: for U.S.A.
  • *2: except U.S.A.
  • *3: for 4WD
  • *4: for U.S.A. without Multi-information Display
  • *5: w/ Towing Package
  • *6: w/ Pre-collision System
  • *7: w/ Blind Spot Monitor System
  • *8: w/ Trailer Brake Control System

2. MULTI-INFORMATION DISPLAY

When the INFO switch is pressed, the multi-information display is changed between the following: cruise information display, warning display.

(a) Cruise information display:

The cruise information is displayed in the following order each time the INFO switch is pressed.

Display

Outline

Average Fuel Economy

  • Value that has been calculated by combination meter, which is based on distance driven and fuel consumption volume (fuel injection signal from No. 1 cylinder).
  • This display is updated every 10 seconds.

Current Fuel Economy

  • Value that has been calculated by combination meter. When ignition switch is turned ON, combination meter calculates this value based on distance driven and fuel consumption volume (fuel injection signal from No. 1 injector).
  • This display is updated every 0.5 seconds.

Distance To Empty

  • Value that has been calculated by combination meter. When ignition switch is turned ON, combination meter calculates this value based on fuel consumption data that combination meter continuously monitors and stores in its memory, and residual fuel volume data.
  • This display is updated every km (mile).

Trip Timer

  • Calculates and displays elapsed time since engine start signal was input into combination meter.
  • This display is updated every second.

Average Speed

  • Value that has been calculated by combination meter. This calculation is based on elapsed time since engine start signal was received by combination meter and vehicle speed signal received by combination meter.
  • This display is updated every 10 seconds.

(b) Warning display:

When a warning is necessary, the warning display interrupts the multi-information display.

The master warning light may illuminate or blink and buzzer may sound depending on the item in the multi-information display.

Display

Details

No Message

-

ADJUSTING FORWARD CAMERA

When front camera adjustment mode request signal is input by tool

ADJUSTING FRONT RADAR BEAM

When milli-wave radar axis adjustment mode request signal is input by tool

ERROR ADJUSTING FRONT RADAR BEAM

When milli-wave radar axis adjustment mode request signal is input by tool

ADJUSTING FRONT RADAR BEAM VERTICAL

When milli-wave radar axis adjustment mode request signal is input by tool

ADJUSTING FRONT RADAR BEAM HORIZONTAL

When milli-wave radar axis adjustment mode request signal is input by tool

CHECKING PCS BRAKE

Displayed according to pre-collision system

CHECKING CRUISE CONTROL BRAKE

Displayed according to cruise control system

BRAKE!

When pre-collision system operated

Engine Stopped Shift into P

When an engine stopped abnormally

Engine Stopped Stop in a Safe Place

When an engine stopped abnormally

Shift to N and Turn Engine Switch to Restart

When an engine stopped abnormally

Not Ready to Drive

When an engine stops other than P range a shift position

ACC/LDA graphics

Displayed according to cruise control system

Door Ajar graphics

Any door is open

Parking Assist Malfunction

When the ECU judges that the sensor needs to be repaired

Clean Parking Assist Sensor

When the ECU judges that the sensor needs to be cleaned

Clearance Sonar graphics

When the No. 1 ultrasonic sensors have detected an obstacle

Release Parking Brake

When the parking brake is still engaged and the vehwcle reaches a speed of 3mph (5km/h)

Release Accelerator

When the shift position was changed and Drive Start Control was operated while depressing the accelerator pedal

SRS Airbag System Malfunction Visit Your Dealer

When the system is unavailable due to a malfunction

Engine Coolant Temp High Stop in a Safe Place See Owner's Manual

Engine coolant temperature is more than 120°C (248°F)

Check Brake System

Check brake system

Radar Cruise Control Unavailable Clean Sensor

Clean sensor indication

Radar Cruise Control Unavailable

When the system is unavailable temporarily

Blind Spot Monitor Unavailable

When the system is unavailable temporarily

Cruise Control Malfunction Visit Your Dealer

When the system is unavailable due to a malfunction

LDA Malfunction Visit Your Dealer

When the system is unavailable due to a malfunction

Front Camera Unavailable

Forward recognition camera temporarily malfunctioning

LDA Unavailable

Sensor other than forward recognition camera sensor is temporarily disabled

Front Camera Unavailable Remove Debris On Windshield

Forward recognition camera view is unclear

Pre-Collision System Malfunction Visit Your Dealer

When the system is unavailable due to a malfunction

Blind Spot Monitor Malfunction Visit Your Dealer

When the system is unavailable due to a malfunction

High Transmission Fluid Temp See Owner's Manual

ATF temperature is high

CHECK TRANSMISSION SYSTEM

ATF temperature sensor in abnormal condition

LDA Unavailable Below Approx. 32MPH

When the system cannot be used as the vehicle speed is lower than approximately 32mph (50km/h)

LDA Unavailable at Current Speed

When the system cannot be used due to the vehicle speed being too high

RADAR READY

When the cruise control main switch is turned on

Would You Like toTake a Break?

Break notice 1

Please Take a Break

Break notice 2

Turn Lights Off

When I turned off IG in except headlight dimmer switch to the auto or off position

Moon Roof Open

When a moon roof becomes vacant at the time of IG off

Drive-Start Control Malfunction Visit Your Dealer

When the system is unavailable due to a malfunction

Brake Override Malfunction Visit Your Dealer

When the system is unavailable due to a malfunction

Headlight System Malfunction Visit Your Dealer

When the system is unavailable due to a malfunction

Accelerator and Brake Pedals Pressed Simultaneously

When Accelerator and Brake Pedals was stepped on at the same time

Setting Tire Pressure Warning System

Displayed according to tire pressure warning system

Tire Pressure Recalibrating Please Wait until Complete

Displayed according to tire pressure warning system

Not available

-

Tire Pressure Warning System Malfunction, Visit Your Dealer

When the system is unavailable due to a malfunction

Tire Pressure Low Check Tire

When the tire inflation pressure is low

Tire Pressure Recalibrating Please Wait until Complete

Displayed according to tire pressure warning system

Tire Pressure (psi)

Tire pressure psi notation

Tire Pressure (kPa)

Tire pressure kPa notation

Tire Pressure (bar)

Tire pressure bar notation

Windshield Washer Fluid Low

Washer fluid level is low

Maintenance Required Soon

Comes on approximately 7242 km (4500 miles) after engine oil is changed

Maintenance Required Visit Your Dealer

Comes on approximately 8047 km (5000 miles) after engine oil is changed

Auto High Beam Ready Turn ON High Beam to Activate

When I turned on Auto High Beam switch in except headlight dimmer switch to the high position

VSC Turned Off Pre-Collision Brake System Unavailable

When the system is unavailable temporarily

Pre-Collision System Unavailable

When the system is unavailable temporarily

Pre-Collision System Unavailable Clean Sensor

Foreign matter attached to millimeter wave radar sensor assembly

Pre-Collision System Off

When I turned off pre-collision system

Fuel Low

Fuel level is low

Trailer Disconnected

When trailer gets disconnected or manual brake slider is operated after that

Trailer Brake Error.

If Towing, Come to a Safe Stop with Manual Controls.

Contact dealer.

When the VSC ECU or G sensor is not communicating with trailer brake control system

Trailer Brake Error.

If Towing, Come to a Safe Stop.

Contact dealer.

When the system is unavailable due to a malfunction

Trailer Wiring, Type, or Connection fault.

See Owner's manual.

When the system is unavailable due to a failure related to the trailer or the wire harness

Please Adjust Gain for Electric Trailer Brake

When the trailer brake is gets reset to 0 when the user selected the electric trailer brake

Trailer Brake Control OFF

When I turned off Trailer Brake Control

Please Adjust Gainfor Electric over Hydraulic Trailer Brake

When the trailer brake is gets reset to 0 when the user selected the electric over hydraulic trailer brake

Trailer Brake status indication as message

When the trailer gain is changed or when the manual brake slider gets operated

Rear Cross Traffic Alert Malfunction Visit Your Dealer

When the function is unavailable due to a malfunction

Rear Cross Traffic AlertUnavailable

When the function is unavailable temporarily

(a) This system has the following functions.

(1) Clock:

When the ignition switch is turned ON or ACC, the clock display is ON.

(2) Cruise Information:

For cruise information, four type of information (Outside temperature, average fuel economy, instant fuel economy, and distance to empty) can be displayed.

  • The cruise information units can be changed by using the SETUP switch.
  • Outside temperature → Average fuel economy → Instant fuel economy → Distance to empty.

    Information

    Outline

    Outside Temperature:

    Displays outside temperature in accordance with the outside temperature sensor signal from the A/C amplifier.

    Average Fuel Economy:

    • Displays a value that has been calculated by the combination meter, which is based on the distance driven and the fuel consumption volume (fuel injection signal from the No. 1 cylinder).
    • This display is updated every 0.5 seconds.

    Instant Fuel Economy:

    • Displays a value that has been calculated by the combination meter. When the ignition switch is turned ON, the combination meter calculates this value based on the distance driven and the fuel consumption volume (fuel injection signal from the No. 1 injector).
    • This display is updated every 0.5 seconds.

    Distance to Empty:

    • When the ignition switch is ON, displays a value that has been calculated by the combination meter (meter ECU), which is based on the following: 1) fuel consumption data that the combination meter (meter ECU) continuously monitors and stores in its memory; and 2) residual fuel volume data.
    • This display is updated every 1.6 km (1 mile).

(3) Security Indicator Light:

  • Informs the driver of the theft deterrent system status.
  • Depending on operation of the transponder key ECU, the interior security indicator light comes on or starts blinking.

(4) Clearance Warning Indicator:

  • Displays the location of the obstacle and the approximate distance between the vehicle and the obstacle.
  • Turns on and off according to the intuitive parking assist system status.
  • Emits an intermittent sound to inform the driver that the ECU has detected an obstacle within the prescribed ranges.
    Speedometer Malfunction

    System Diagram

    See More:

    Toyota Tundra Service Manual > Rear View Monitor System(for Navigation Receiver Type): Image from Camera for Rear View Monitor is Abnormal
    DESCRIPTION This is the display signal circuit between the navigation receiver assembly and the television camera assembly. WIRING DIAGRAM PROCEDURE 1. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - TELEVISION CAMERA ASSEMBLY) NG REPAIR OR REPLACE HARNESS OR CONNECTOR OK 2. CHECK NAVIGA ...

    Toyota Tundra Owners Manual

    Toyota Tundra Service Manual

    © 2024 Copyright www.ttundra.com
    0.0357