Toyota Venza manuals

Toyota Venza: Fail-safe Chart

FAIL-SAFE CHART

1. FAIL-SAFE FUNCTION

(a) When communication fails in any of the CAN bus wires (communication wires), a fail-safe function(s) will operate. The fail-safe function that is specified for each system operates to prevent those systems from malfunctioning.

(b) Effects on each system when communication is impossible are shown in the table below. (For further details, see the pages for each system.)

Function

(Function Description)

Control Master

System Related

Fail-safe Operation

DTC

(Driver Detectable)

ABS control

(Controls driving force while ABS in operation)

Skid control ECU

  • ECM
  • Yaw rate sensor

ABS control is inoperative.

(ABS control gradually stops.)

U0073

U0100

U0124

(Warning and indicator lights come on)

TRC control

(Engine power control by VSC / TRC)

Skid control ECU

  • ECM
  • Yaw rate sensor
  • Steering angle sensor

ABS / VSC control is inoperative.

(ABS / VSC control gradually stops.)

U0073

U0100

U0123

U0124

U0126

(Warning and indicator lights come on)

VSC control

(Controls driving force while VSC in operation)

Skid control ECU

  • ECM
  • Yaw rate sensor
  • Steering angle sensor

ABS / VSC control is inoperative.

(ABS / VSC control gradually stops.)

U0073

U0100

U0123

U0124

U0126

(Warning and indicator lights come on)

Electric power steering control

(Speed of vehicle induction type torque control)

Power steering ECU

  • ECM
  • Skid control ECU

Depression of EPS assist

(Deterioration of steering assist)

U0100

U0129

(Warning light comes on)

Air conditioning control

(Air conditioning control in cabin)

Air conditioning amplifier

  • ECM
  • Combination meter
  • Main body ECU

Air conditioning function and PTC heater function stop.

U0100

U0131

U0142

U0155

(Air conditioning is inoperative)

Four wheel drive control

4WD control ECU

  • ECM
  • Skid control ECU
  • Yaw rate sensor
  • Steering angle sensor
  • Main body ECU
  • Air conditioning amplifier

Fixed torque distribution

U0073

U0100

U0123

U0124

U0126

U0129

(Warning and indicator lights come on)

Headlight swivel / Leveling control

(Headlight control)

AFS ECU

  • ECM
  • Skid control ECU
  • Steering angle sensor
  • Main body ECU

Swivel control stops.

(Leveling control remains on.)

-

(Indicator light blinks)

Entry function / Power door lock control

Certification ECU

Main Body ECU

Unlock permitted

U0327

U1002

(Wireless door lock cannot operate)

Air conditioning control (Controls air conditioning functions such as set temperature adjustment, air outlet selection, etc. using navigation receiver assembly.)

Navigation receiver assembly

Air conditioning amplifier

  • When set temperature is shown on multi-display, set temperature display turns off.
  • Air conditioning function(s) are prohibited.
  • A message indicating to check air conditioning amplifier connection appears on multi-display.

U0073

Fuel consumption display (Displays graph of fuel consumption per minute and history of total fuel consumption.)

  • Navigation receiver assembly
  • Radio and display receiver assembly
  • ECM
  • Combination meter
  • Skid control ECU

If a communication interruption occurs, values are not displayed.

U0100

U0129

U0155

Destination determination (Determines the destination based on the destination symbol and destination package information and selects the display language, time zone, etc.)

  • Navigation receiver assembly
  • Radio and display receiver assembly

Main Body ECU

Determines the destination according to the last received value and operates accordingly (if there is no last received value, the system operates using the default value).

U0140

Intuitive parking assist system setting / Notification (Controls settings for clearance sonar screen notifications which are set by operating the touch panel of the display, displays sonar status and plays voice warnings.)

  • Navigation receiver assembly
  • Radio and display receiver assembly
  • ECM
  • Clearance warning ECU assembly

Clearance sonar screen is turned off.

U0100

Time stamp function (Matches the relative time from the main body ECU with the absolute time acquired from the GPS.)

  • Navigation receiver assembly
  • Radio and display receiver assembly

Main Body ECU

None

U0073

U0140

Outer mirror control

Outer mirror control ECU assembly

Main Body ECU

Operation of outer mirrors is prohibited.

U0142

Seat position memory

Position control ECU and switch assembly

  • ECM
  • Combination meter
  • Main Body ECU
  • Auto memory recall is prohibited.
  • Memory is prohibited.

-

Parking assist system control

  • Judges shift lever position
  • Judges vehicle speed

Clearance warning ECU assembly

  • ECM
  • TCM
  • Combination meter
  • Main Body ECU

Obstacle detection is stopped.

U0100

U0101

U0142

U0155

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