Failsafe Chart

This function minimizes the loss of the ECT functions when a malfunction occurs in each sensor or solenoid.

FAIL-SAFE CHART

Malfunction Part

Function

DTC P0710, P0712 and P0713: No. 1 ATF Temperature Sensor

During a No. 1 ATF temperature sensor malfunction, up-shift to the 5th gear and flex lock-up clutch control are prohibited.

DTC P0722:

During an output speed sensor malfunction, shift control is effected

2006 TRANSMISSION A750E Automatic Transaxle - Sequoia

Output Speed Sensor (SP2)

through the input speed sensor signal (NT).

DTC P0751, P0756, P0771, P0973, P0974, P0976, P0977, P0985 and P0986: Shift Solenoid Valve S1, S2 and SR

The current to the failed solenoid valve is cut off and control is effected by operating the other solenoid valves with normal operation. Shift control is effected depending on the failed solenoid as described in the table below.

DTC P0748, P0776 and P0778: Shift Solenoid Valve SL1 and SL2

During a solenoid valve SL1 or SL2 malfunction, up-shift to the 5th gear is prohibited.

DTC P02714 and P2716: Shift Solenoid Valve SLT

During a solenoid valve SLT malfunction, the current to the solenoid valve is stopped. This stops line pressure optimal control, and shift shock increases. However, shifting is effected through normal clutch pressure control.

DTC P2757:

Shift Solenoid Valve SLU

During a solenoid valve SLU malfunction, the current to the solenoid valve is stopped. This stops lock-up control and flex lock-up control, and fuel economy decreases.

Fail-safe function:

If either of the shift solenoid valve circuits has an open or short failure, the ECM turns the other shift solenoid ON and OFF in order to shift into the gear positions shown in the table below.

In case of a short circuit, the ECM stops sending current to the short circuit solenoid.

Even if starting the engine again in the fail-safe mode, the gear position remains in the same position.

FAIL-SAFE FUNCTION

Position

NORMAL

S1 OFF

Gear

S1

S2

SR

SL1

SL2

Gear

S1

S2

SR

SL1

SL2

R

R

ON

OFF

OFF

OFF

ON

R

OFF

OFF

OFF

OFF

ON

D

1st

ON

OFF

OFF

OFF

ON

4th 3rd

OFF

OFF ON

OFF

OFF

ON

2nd

ON

ON

OFF

OFF

ON

3rd

OFF

ON

OFF

OFF

ON

3rd

OFF

ON

OFF

OFF

ON

3rd

OFF

ON

OFF

OFF

ON

4th

OFF

OFF

OFF

OFF

ON

4th

OFF

OFF

OFF

OFF

ON

5th

OFF

OFF

ON

ON

OFF

5th

OFF

OFF

ON

ON

OFF

3

1st

ON

OFF

OFF

OFF

ON

3rd 3rd E/B

OFF

OFF ON

OFF

OFF

ON OFF

2nd

ON

ON

OFF

OFF

ON

3rd 3rd E/B

OFF

ON

OFF

OFF

ON OFF

3rd E/B

OFF

ON

OFF

OFF

OFF

3rd E/B

OFF

ON

OFF

OFF

OFF

4th

OFF

OFF

ON

OFF

ON

4th

OFF

OFF

ON

OFF

ON

5th

OFF

OFF

ON

ON

OFF

5th

OFF

OFF

ON

ON

OFF

2

1st

ON

OFF

OFF

OFF

ON

1st

OFF

OFF

OFF

OFF

ON

2nd E/B

ON

ON

ON

OFF

OFF

3rd E/B

OFF

ON

ON

OFF

OFF

3rd E/B

OFF

ON

ON

OFF

OFF

3rd E/B

OFF

ON

ON

OFF

OFF

2006 TRANSMISSION A750E Automatic Transaxle - Sequoia

4th

OFF

OFF

ON

OFF

ON

4th

OFF

OFF

ON

OFF

ON

5th

OFF

OFF

ON

ON

OFF

5th

OFF

OFF

ON

ON

OFF

1st E/B

ON

OFF

OFF

OFF

OFF

1st E/B

OFF

OFF

OFF

OFF

OFF

2nd E/B

ON

ON

ON

OFF

OFF

3rd E/B

OFF

ON

ON

OFF

OFF

L

3rd E/B

OFF

ON

ON

OFF

OFF

3rd E/B

OFF

ON

ON

OFF

OFF

4th

OFF

OFF

ON

OFF

ON

4th

OFF

OFF

ON

OFF

ON

5th

OFF

OFF

ON

ON

OFF

5th

OFF

OFF

ON

ON

OFF

FAIL-SAFE FUNCTION

Position

S2 OFF

SR OF]

F

Gear

S1

S2

SR

SL1

SL2

Gear

S1

S2

SR

SL1

SL2

R

R

ON

OFF

OFF

OFF

ON

R

ON

OFF

OFF

OFF

ON

D

1st

ON

OFF

OFF

OFF

ON

1st

ON

OFF

OFF

OFF

ON

1st 4th

ON OFF

OFF

OFF

OFF

ON

2nd

ON

ON

OFF

OFF

ON

4th

OFF

OFF

OFF

OFF

ON

3rd

OFF

ON

OFF

OFF

ON

4th

OFF

OFF

OFF

OFF

ON

4th

OFF

OFF

OFF

OFF

ON

5th

OFF

OFF

ON

ON

OFF

4th

OFF

OFF

OFF

ON

OFF

3

1st

ON

OFF

OFF

OFF

ON

1st

ON

OFF

OFF

OFF

ON

1st 3rd E/B

ON OFF

OFF

OFF

OFF

ON OFF

2nd

ON

ON

OFF

OFF

ON

3rd E/B

OFF

OFF

OFF

OFF

OFF

3rd E/B 3rd

OFF

ON

OFF

OFF

OFF ON

4th

OFF

OFF

ON

OFF

ON

3rd

OFF

OFF ON

OFF

OFF

ON ON

5th

OFF

OFF

ON

ON

OFF

3rd E/B 3rd

OFF

OFF ON

OFF

ON OFF

OFF ON

2

1st

ON

OFF

OFF

OFF

ON

1st

ON

OFF

OFF

OFF

ON

2nd E/B 4th

ON OFF

OFF

ON

OFF

OFF ON

2nd

ON

ON

OFF

OFF

OFF

Fail 4th

OFF

OFF

ON

OFF

OFF ON

2nd

OFF ON

ON

OFF

OFF

OFF

4th

OFF

OFF

ON

OFF

ON

1st 2nd

OFF ON

OFF ON

OFF

OFF

ON OFF

5th

OFF

OFF

ON

ON

OFF

1st E/B 2nd

OFF ON

ON

OFF

ON OFF

OFF

L

1st E/B

ON

OFF

OFF

OFF

OFF

1st E/B

ON

OFF

OFF

OFF

OFF

2nd E/B 4th

ON OFF

OFF

ON

OFF

OFF ON

2nd

ON

ON

OFF

OFF

OFF

Fail 4th

OFF

OFF

ON

OFF

OFF ON

2nd

OFF ON

ON

OFF

OFF

OFF

4th

OFF

OFF

ON

OFF

ON

1st 2nd

OFF

OFF

OFF

OFF

ON

2006 TRANSMISSION A750E Automatic Transaxle - Sequoia

ON

ON

OFF

5th

OFF

OFF

ON

ON

OFF

1st E/B 2nd

OFF ON

OFF ON

OFF

ON OFF

OFF

FAIL-SAFE FUNCTION

Position

S1 S2 OFF

S2 SR OFF

Gear

S1

S2

SR

SL1

SL2

Gear

S1

S2

SR

SL1

SL2

R

R

OFF

OFF

OFF

OFF

ON

R

ON

OFF

OFF

OFF

ON

D

4th

OFF

OFF

OFF

OFF

ON

1st

ON

OFF

OFF

OFF

ON

4th

OFF

OFF

OFF

OFF

ON

1st 4th

ON OFF

OFF

OFF

OFF

ON

4th

OFF

OFF

OFF

OFF

ON

4th

OFF

OFF

OFF

OFF

ON

4th

OFF

OFF

OFF

OFF

ON

4th

OFF

OFF

OFF

OFF

ON

5th

OFF

OFF

ON

ON

OFF

4th

OFF

OFF

OFF

ON OFF

OFF ON

3

3rd 3rd E/B

OFF

OFF

OFF

OFF

ON OFF

1st

ON

OFF

OFF

OFF

ON

3rd 3rd E/B

OFF

OFF

OFF

OFF

ON OFF

1st E/B 3rd

ON OFF

OFF

OFF

OFF

ON ON

3rd E/B

OFF

OFF

OFF

OFF

OFF

3rd E/B 3rd

OFF

OFF

OFF

OFF

OFF ON

4th

OFF

OFF

ON

OFF

ON

3rd

OFF

OFF

OFF

OFF

ON ON

5th

OFF

OFF

ON

ON

OFF

1st E/B 3rd

OFF

OFF

OFF

ON OFF

OFF ON

2

1st

OFF

OFF

OFF

OFF

ON

1st

ON

OFF

OFF

OFF

ON

Fail 4th

OFF

OFF

ON

OFF

OFF ON

1st E/B 1st

ON

OFF

OFF

OFF

OFF ON

Fail 4th

OFF

OFF

ON

OFF

OFF ON

1st E/B 1st

OFF ON

OFF

OFF

OFF

OFF ON

4th

OFF

OFF

ON

OFF

ON

1st

OFF ON

OFF

OFF

OFF

ON

5th

OFF

OFF

ON

ON

OFF

1st E/B 1st

OFF ON

OFF

OFF

ON OFF

OFF ON

L

1st E/B

OFF

OFF

OFF

OFF

OFF

1st E/B

ON

OFF

OFF

OFF

OFF

Fail 4th

OFF

OFF

ON

OFF

OFF ON

1st E/B 1st

ON

OFF

OFF

OFF

OFF ON

Fail 4th

OFF

OFF

ON

OFF

OFF ON

1st E/B 1st

OFF ON

OFF

OFF

OFF

OFF ON

4th

OFF

OFF

ON

OFF

ON

1st

OFF ON

OFF

OFF

OFF

ON

5th

OFF

OFF

ON

ON

OFF

1st E/B 1st

OFF ON

OFF

OFF

ON OFF

OFF ON

FAIL-SAFE FUNCTION

Position

S1 SR OFF

S1 S2 SR OFF

Gear

S1

S2

SR

SL1

SL2

Gear

S1

S2

SR

SL1

SL2

R

R

OFF

OFF

OFF

OFF

ON

R

OFF

OFF

OFF

OFF

ON

D

4th 3rd

OFF

OFF ON

OFF

OFF

ON

4th

OFF

OFF

OFF

OFF

ON

3rd

OFF

ON

OFF

OFF

ON

4th

OFF

OFF

OFF

OFF

ON

3rd

OFF

ON

OFF

OFF

ON

4th

OFF

OFF

OFF

OFF

ON

4th

OFF

OFF

OFF

OFF

ON

4th

OFF

OFF

OFF

OFF

ON

4th

OFF

OFF

OFF

ON OFF

OFF ON

4th

OFF

OFF

OFF

ON OFF

OFF ON

3

3rd

OFF

OFF ON

OFF

OFF

ON ON

3rd

OFF

OFF

OFF

OFF

ON ON

3rd

OFF

ON

OFF

OFF

ON ON

3rd

OFF

OFF

OFF

OFF

ON ON

3rd E/B 3rd

OFF

ON

OFF

OFF

OFF ON

3rd E/B 3rd

OFF

OFF

OFF

OFF

OFF ON

2006 TRANSMISSION A750E Automatic Transaxle - Sequoia

3rd

OFF

OFF ON

OFF

OFF

ON ON

3rd

OFF

OFF

OFF

OFF

ON ON

3rd E/B 3rd

OFF

OFF ON

OFF

ON OFF

OFF ON

3rd E/B 3rd

OFF

OFF

OFF

ON OFF

OFF ON

2

1st

OFF

OFF

OFF

OFF

ON

1st

OFF

OFF

OFF

OFF

ON

2nd

OFF

ON

OFF

OFF

OFF

1st E/B 1st

OFF

OFF

OFF

OFF

OFF ON

2nd

OFF

ON

OFF

OFF

OFF

1st E/B 1st

OFF

OFF

OFF

OFF

OFF ON

1st 2nd

OFF

OFF ON

OFF

OFF

ON OFF

1st

OFF

OFF

OFF

OFF

ON

1st E/B 2nd

OFF

OFF ON

OFF

ON OFF

OFF

1st E/B 1st

OFF

OFF

OFF

ON OFF

OFF ON

L

1st E/B

OFF

OFF

OFF

OFF

OFF

1st E/B

OFF

OFF

OFF

OFF

OFF

2nd

OFF

ON

OFF

OFF

OFF

1st E/B 1st

OFF

OFF

OFF

OFF

OFF ON

2nd

OFF

ON

OFF

OFF

OFF

1st E/B 1st

OFF

OFF

OFF

OFF

OFF ON

1st 2nd

OFF

OFF ON

OFF

OFF

ON OFF

1st

OFF

OFF

OFF

OFF

ON

1st E/B 2nd

OFF

OFF ON

OFF

ON OFF

OFF

1st E/B 1st

OFF

OFF

OFF

ON OFF

HINT:

• : Condition in the electrical malfunction is shown above " ".

• : Condition in fail-safe mode is shown below " ".

DATA LIST / ACTIVE TEST 1. READ DATA LIST

HINT:

Using the intelligent tester's DATA LIST allows switch, sensor, actuator, and other item values to be read without removing any parts. Reading the DATA LIST early in troubleshooting is one way to save time.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.

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