Toyota 4Runner: Fail-safe Chart

Engine-related Indicators

(The system estimates the oil deterioration level and the indicators indicate on the meter that an oil change is necessary, etc.)

The engine-related indicator lights do not turn on.

-

Electrical Load Control

(Performs idle up according to the electrical load.)

Idle up according to the electrical load is not performed.

The idle speed changes.

-

Air Conditioning-linked Control

(Performs idle up according to the compressor load.)

Air conditioning-linked control does not operate.

The air conditioning does not operate.

-

PTC Heater

(Performs idle up according to requests from the PTC heater or heater system.)

The PTC heater does not operate.

The idle speed changes and heater performance deteriorates.

-

Eco Driving Indicator

(Displays information to the driver to encourage "ecodriving".)

The eco driving indicator light does not turn on.

-

Integrated Control (VSC)

(Estimates the driver requested torque based on accelerator pedal operation and performs torque characteristic control according to driving conditions so that drivability, acceleration performance and acceleration feeling are improved.)

Integrated control is not performed.

Nothing

-

ECT System Indicators

(Indicate shift position, states of switches, system modes, etc.)

-

ECT system indicator lights do not turn on.

-

AI-SHIFT Control

(Controls the A/T in order to improve engine braking power and acceleration feel.)

AI-SHIFT control does not operate.

Nothing

-

Coast Downshift

(Changes the coast downshift point based on the air conditioning load and performs upshift delay according to air conditioning or heater requests.)

Coast downshift does not operate.

Coast downshift shock becomes stronger.

-

Cruise Control

(Adjusts the engine throttle valve opening amount automatically to maintain the vehicle speed.)

Cruise control does not operate.

The CRUISE main indicator light and CRUISE SET indicator light blink.

-

ABS Control

(Controls the ABS according to the yaw rate sensor signal.)

The ABS does not operate.

The ABS indicator light turns on.

U0073

U0114

U0123

U0124

TRC Control

(Controls the brakes and engine torque during acceleration slip.)

TRC does not operate.

The SLIP indicator light turns on.

U0073

U0100

U0114

U0123

U0124

U0126

VSC Control

(Controls VSC according to yaw rate sensor and steering angle sensor signals.)

VSC does not operate.

The SLIP indicator light turns on.

U0073

U0100

U0114

U0123

U0124

U0126

Steering Sensor

(Detects the steering wheel angle.)

-

The SLIP indicator light turns on.

-

Vehicle Speed Information Input

(Controls solenoid current [PPS solenoid] according to the vehicle speed, steering angle, steering speed and engine speed.)

Changes to the 40 km/h (25 mph) assist map to perform control.

The PPS indicator light turns on.

U0129

Steering Wheel Angle Information Input

(Controls solenoid current [PPS solenoid] according to the vehicle speed, steering angle, steering speed and engine speed.)

Steering angle is fixed at 0 degrees and the steering angle speed is fixed at 360 degrees per second.

Nothing

U0126

Engine Speed Information Input

(Controls solenoid current [PPS solenoid] according to the vehicle speed, steering angle, steering speed and engine speed.)

Control is performed using a fixed value of 0 rpm.

Nothing

U0100

TC DTC Output Service

(Outputs a DTC in response to a DTC output request from the combination meter assembly.)

The TC service function stops.

Nothing

-

Event Data Recorder (EDR)

(Records conditions such as the vehicle speed, the amount the accelerator pedal is depressed and the shift lever position when the event data recorder recording conditions are met.)

Data is not recorded.

Nothing

-

SRS Warning Light Control

(Turns the warning light on/off.)

-

The SRS warning light turns on.

-

Collision Detection Signal (for Fuel-cut)

(Notifies the system of a collision in order to perform fuel-cut when a vehicle collision occurs.)

-

Nothing

-

Seat Belt Warning Light Control

(Turns the seat belt warning light on/off.)

-

Nothing

-

Air Conditioning System Control

(Controls the air conditioning according to the engine coolant temperature information, controls the PTC heater operation according to the PTC heater operation permission information.)

Nothing

U0100

U0142

U0155

Speedometer

(Controls the speedometer according to the vehicle speed signals.)

0 km/h (0 mph) is indicated.

Behavior during a communication failure alerts the user.

U0129

Tachometer

(Controls the tachometer according to the engine speed signals.)

0 rpm is indicated.

Behavior during a communication failure alerts the user.

U0100

Engine Coolant Temperature Gauge

(Controls the temperature gauge according to the temperature signals.)

The temperature gauge needle is at the middle of the "C" mark or below.

Nothing

U0100

Fuel Receiver Gauge

(Controls the fuel gauge according to the vehicle condition determined by the ST signal, vehicle speed signal and fuel amount.)

Nothing

U0100

U0129

ODO/TRIP Meter

(Calculates and indicates the driven distance according to the pulse count of the vehicle speed pulse signal.)

The calculation stops and the last displayed value remains.

Nothing

U0129

Shift Display

(Displays the shift information according to the shift position signal.)

The shift display turns off.

Nothing

U0100

Telltale

(Controls indicator illumination and blinking according to the CAN signals and direct line input signals.)

-

The indicator or warning lights turn on.

U0100

U0129

U0131

U0142

U0151

Buzzer

(Controls the sounding of buzzers according to the CAN signals and direct line input signals.)

-

Buzzer sounds.

U0100

U0129

U0142

U0151

Drive Monitor

(Performs calculations and displays drive monitor information according to the fuel injection volume and pulse count of the vehicle pulse signal.)

The drive monitor calculations stop and the display is blank.

Nothing

U0100

U0129

U0142

Multi-information Display

(Displays the outside temperature and road surface freezing information.)

The multi-information display is blank.

Nothing

-

Dimming Control

(Dims the lighting level of the display or escutcheon key by turning ON and OFF the Dimmer switch.)

Control continues.

Nothing

U0140

Destination Auto-detect Function

(Detects the destination of the vehicle based on the package information and switches between those with and without the Entune and HD radio functions.)

Control continues.

Nothing

U0140

Steering Wheel Position Detection Function

(Judges the sequence of speaker check in the diagnosis based on information on the steering wheel position.)

Control continues.

Nothing

U0140

Trip Counter

(Maintains trip counter information according to the number of times the ignition switch was set to ACC.)

Control continues.

Nothing

U0140

Time Counter

(Maintains time count information according to the time elapsed since the ignition switch was set to ACC.)

Control continues.

Nothing

U0140

Entry Functions

(Operates the entry lock/unlock, entry trunk open/entry back door unlatch and entry warning/illumination functions.)

The entry functions do not operate.

Nothing

U0142

Wireless Functions

(Operates the wireless lock/unlock, trunk and panic functions.)

The wireless functions do not operate.

Nothing

U0142

Engine Switch Illumination Control

(Turns the engine switch illumination on/off.)

The engine switch illumination does not operate.

Nothing

U0142

Door Lock (Key-linked Function, Key Lock-in Prevention Function, etc.)

(Performs lock/unlock control.)

Shift lever-linked auto lock or unlock operation is prohibited.

Nothing

U0100

U0101

-

Nothing

U0151

Vehicle speed-linked auto unlock is prohibited.

Nothing

U0155

Wireless/Entry and Start

(Performs wireless/entry and start control.)

Nothing

U0327

Alarm

(Sounds warnings.)

-

Nothing

U0100

U0101

U1133

Lighting Control

(Performs DRL control.)

DRL control does not operate.

Nothing

U0100

U0101

Display Automatic Dimming

(Controls display dimming control.)

Dims the interior display/indicators when not in the tail cancel state.

Nothing

U0155

Illumination

(Performs illumination control.)

Turns off the map light.

Nothing

U0327

Seat Control (Performs memory control [seat position adjustment].)

-

Nothing

U0208

ADD Switching Limitation

(Prohibits the ADD actuator switching from free to lock when the difference between the vehicle wheel speeds is outside the acceptable range.)

ADD switching is prohibited.

The 4WD indicator light blinks and the buzzer sounds.

-

Rear Differential Lock Switching Limitation

(Prohibits rear differential lock switching when the vehicle speed is outside the acceptable range.)

Rear differential lock switching is prohibited.

The 4WD indicator light blinks.

-

Specialized Control during Wheel Speed Failure

(When there is abnormal wheel speed, this control permits switching only when specified conditions are met [not all wheel speeds are abnormal, the brakes are applied, the engine speed is low and all normal wheels speeds are low].)

When all 4 wheels are malfunctioning, switching is prohibited.

The 4WD indicator light blinks.

-

4WD Indicator Light and Buzzer Signal Output

(Outputs a signal indicating the indicator and buzzer state, which are used to determine the actuator position and switching status.)

State signal update is not possible.

Nothing

-

4WD State Signal Output

(Outputs a signal when switching to the H4 position is finished.)

State signal update is not possible.

The 4WD indicator light status changes in accordance with changes in the 4WD state signal.

-

L4 State Signal Output

(Outputs a signal when switching to the L4 position is finished.)

State signal update is not possible.

The 4LO indicator light status changes in accordance with changes in the L4 state signal.

-

Rear Differential Lock State Signal Output

(Outputs the rear differential P/S state.)

State signal update is not possible.

The rear differential lock indicator light status changes in accordance with changes in the rear differential lock state signal.

-

Signal Output during Switching

(Outputs the actuator switching state.)

State signal update is not possible.

The indicator lights blink during signal output during switching.

-

Multi-terrain Select Output

(Outputs an multi-terrain select service cancel command signal.)

State signal update is not possible.

Nothing

-

High-Low Switching Limitation

(Prohibits High-Low switching when the vehicle speed or engine speed is outside the acceptable range or the A/T is not in N during the A/T status check.)

High-Low switching is prohibited.

The 4WD indicator light blinks and the buzzer sounds.

-

Center Differential Lock Switching Limitation

(Prohibits center differential lock switching when the difference in wheel speeds is large.)

Prohibits center differential lock switching.

The 4WD indicator light blinks and the buzzer sounds.

-

L4F Switching Limitation

(Prohibits switching to L4F when VSC is malfunctioning.)

L4F switching is prohibited.

Nothing

-

H-L Actuator Failure Signal Output

(Outputs a signal when the H-L actuator switch is malfunctioning.)

State signal update is not possible.

The indicator lights blink quickly.

-

Cruise Control Cancel Signal Output

(Outputs a cruise control cancel signal when center differential switching is not completed even though 5 seconds or more have elapsed from the start of switching.)

State signal update is not possible.

Nothing

-

Center Differential Lock State Signal Output

(Outputs the center differential lock P/S state.)

State signal update is not possible.

The status of the indicator lights changes in accordance with changes in the center differential lock state signal.

-

Push Start (Power Source Switching)

(Changes the power source mode automatically based on the push start switch signal and commands the starter to operate when certain conditions are met.)

Does not display the necessary starting operation commands.

Nothing

U0100

U0129

KDSS System

(Opens and closes the accumulator valve to suppress roll.)

Nothing

U0100

U0122

U0124

U0126

Multi-function Switch

(Operates the clearance sonar and 2nd start switch using the steering switch.)

-

Nothing

-

Multi-terrain Select

(Informs the user of the recommended vehicle state according to driving conditions.)

Nothing

-

Crawl Control Switch

(Sends the crawl control switch information.)

-

Nothing

-

Seat Memory System (Controls the seat position according to the operating conditions.)

The seat memory system does not operate.

Nothing

-