Toyota Venza manuals

Toyota Venza: Fail-safe Chart

FAIL-SAFE CHART

1. Fail-safe

This function minimizes the loss of operation when any abnormality occurs in a sensor or solenoid.

Fail-safe Control List

Malfunction Part

Function

Input Turbine Speed Sensor

Shifting to only either 1st or 3rd gears is allowed.

Counter Gear Speed Sensor

  • The counter gear speed is determined based on the signals from the skid control ECU (speed sensor signals).
  • Shifting between 1st to 4th gears is allowed.

ATF Temp. Sensor

Shifting between 1st to 4th gears is allowed.

ECT ECU

Power Supply (Voltage is Low)

When the vehicle is being driven in 6th gear, the transaxle is fixed in 6th gear. When being driven in any of 1st to 5th gears, the transaxle is fixed in 5th gear.

CAN communication

Shifting to only either 1st or 3rd gears is allowed.

Knock Sensor

Shifting between 1st to 4th gears is allowed.

Solenoid Valve SL1, SL2, SL3 and SL4

The current to the failed solenoid valve is cut off and operating the other solenoid valves with normal operation performs shift control. (Shift controls in fail-safe mode are described in the table on the next page. For details, refer to Fail-Safe Control Chart)

Solenoid Valve Operation when Normal

Gear

1st

2nd

3rd

4th

5th

6th

Solenoid

SL1

ON

ON

ON

ON

OFF

OFF

SL2

OFF

OFF

OFF

ON

ON

ON

SL3

OFF

ON

OFF

OFF

OFF

ON

SL4

OFF

OFF

ON

OFF

ON

OFF

Fail-safe Control Chart
 

Gear in Normal Conditions

1st

2nd

3rd

4th

5th

6th

SL1

ON Malfunction (without Fail-safe Control)*1

1st

2nd

3rd

4th

4th

4th

OFF Malfunction (without Fail-safe Control)

1st to N

2nd to N

3rd to N

4th to N

5th

6th

Fail-safe Control during OFF Malfunction

Fixed in 3rd or 5th

SL2

ON Malfunction (without Fail-safe Control)*1

1st to 4th

2nd to 4th

3rd to 4th

4th

5th

6th

OFF Malfunction (without Fail-safe Control)

1st

2nd

3rd

4th to 1st

5th to N

6th to N

Fail-safe Control during OFF Malfunction

Fixed in 2nd or 3rd

SL3

ON Malfunction (without Fail-safe Control)*1

1st to 2nd

2nd

3rd

4th

5th

6th

OFF Malfunction (without Fail-safe Control)

1st

2nd to 1st

3rd

4th

5th

6th to N

Fail-safe Control during OFF Malfunction

Fixed in 3rd

SL4

ON Malfunction (without Fail-safe Control)*1

3rd

3rd

3rd

4th

5th

5th

OFF Malfunction (without Fail-safe Control)

1st

2nd

3rd to 1st

4th

5th to N

6th

Fail-safe Control during OFF Malfunction

Fixed in 2nd

*1: Fail-safe control is not actuated when an ON malfunction occurs.

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