Toyota Sequoia (2005). Manual - part 190

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–555

749

Chapter 2: On–Vehicle Repair
(

: A750E, A750F AUTOMATIC TRANSMISSION Repair Manual Pub. No. RM999U)

Symptom

Suspect Area

See page

Vehicle does not move with shift lever in any forward position and

reverse position

1. Transmission control cable
2. Manual valve

3. Parking lock pawl

4. Off–vehicle repair matrix chart

DI–524

–

Vehicle does not move with shift lever in R position

1. Valve body assy
2. Off–vehicle repair matrix chart

AT–10

–

No up–shift (1st 

→

 2nd)

1. Valve body assy
2. Off–vehicle repair matrix chart

AT–10

–

No up–shift (2nd 

→

 3rd)

1. Valve body assy
2. Off–vehicle repair matrix chart

AT–10

–

No up–shift (3rd 

→

 4th)

1. Valve body assy
2. Off–vehicle repair matrix chart

AT–10

–

No up–shift (4th 

→

 5th)

1. Valve body assy
2. Off–vehicle repair matrix chart

AT–10

–

No down–shift (5th 

→

 4th)

1. Valve body assy
2. Off–vehicle repair matrix chart

AT–10

–

No down–shift (4th 

→

 3rd)

1. Valve body assy
2. Off–vehicle repair matrix chart

AT–10

–

No down–shift (3rd 

→

 2nd)

1. Valve body assy
2. Off–vehicle repair matrix chart

AT–10

–

No down–shift (2nd 

→

 1st)

1. Valve body assy
2. Off–vehicle repair matrix chart

AT–10

–

No lock–up or No lock–up off

1. Shift solenoid valve (SLU)
2. Valve body assy
3. Off–vehicle repair matrix chart

DI–672

AT–10

–

Harsh engagement (N 

→

 D)

1. Shift solenoid valve (SL1)
2. Valve body assy
3. C

1 

accumulator

4. Off–vehicle repair matrix chart

DI–620

AT–10

–

Harsh engagement (Lock–up)

1. Shift solenoid valve (SLU)
2. Valve body assy
3. Off–vehicle repair matrix chart

DI–672

AT–10

–

Harsh engagement (N 

→

 R)

1. Shift solenoid valve (SLT)
2. Shift solenoid valve (SLU)
3. Valve body assy
4. C

3 

accumulator

5. Off–vehicle repair matrix chart

DI–656

DI–672

AT–10

–

Harsh engagement (1st 

→

2nd 

→

 3rd 

→

 4th 

→

5th)

1. Shift solenoid valve (SLT)
2. Shift solenoid valve (SL1)
3. Valve body assy

DI–656

DI–620

AT–10

Harsh engagement (1st 

→

 2nd)

1. Valve body assy
2. B

3 

accumulator

3. Off–vehicle repair matrix chart

AT–10

–

Harsh engagement (2nd 

→

 3rd)

1. Valve body assy
2. C

3 

accumulator

3. Off–vehicle repair matrix chart

AT–10

–

Harsh engagement (3rd 

→

 4th)

1. Valve body assy
2. C

2 

accumulator

3. Off–vehicle repair matrix chart

AT–10

–

DI–556

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

750

Harsh engagement (4th 

→

 5th)

1. Shift solenoid valve (SL1)
2. Shift solenoid valve (SL2)
3. Valve body assy
4. Off–vehicle repair matrix chart

DI–620

DI–625

AT–10

–

Harsh engagement (5th 

→

 4th)

1. Shift solenoid valve (SL1)
2. Shift solenoid valve (SL2)
3. Valve body assy
4. Off–vehicle repair matrix chart

DI–620

DI–625

AT–10

–

Slip or shudder (Forward and reverse)

1. Transmission control cable
2. Valve body assy
3. Oil strainer
4. Off–vehicle repair matrix chart

DI–524

AT–10

AT–10

–

No engine braking (1st: L position)

1. Valve body assy
2. Off–vehicle repair matrix chart

AT–10

–

No engine braking (2nd: 2 position)

1. Valve body assy
2. Off–vehicle repair matrix chart

AT–10

–

No kick–down

Valve body assy

AT–10

Shift point too high or too low

1. Shift solenoid valve (SLT)
2. Shift solenoid valve (SL1)
3. Valve body assy

DI–656

DI–620

AT–10

Poor acceleration

1. Shift solenoid valve (SLT)
2. Valve body assy

DI–656

AT–10

Engine stalls when starting off or stopping

1. Shift solenoid valve (SLU)
2. Valve body assy

DI–672

AT–10

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–557

751

Chapter 3: Off–Vehicle Repair
(

: A750E, A750F AUTOMATIC TRANSMISSION Repair Manual Pub. No. RM999U)

Symptom

Suspect Area

See page

Vehicle does not move with shift lever in any forward position and
reverse position

1. Rear planetary gear unit
2. Torque converter clutch

AT–30

Vehicle does not move with shift lever in R position

1. Brake No. 4 (B

4

)

2. Clutch No. 3 (C

3

)

3. One–way clutch No.4 (F

1

)

No up–shift (1st 

→

 2nd)

1. Brake No. 3 (B

3

)

2. One–way clutch No.1 (F

1

)

3. One–way clutch No. 2 (F

2

)

No up–shift (2nd 

→

 3rd)

Clutch No. 3 (C

3

)

No up–shift (3rd 

→

 4th)

Clutch No. 2 (C

2

)

No up–shift (4th 

→

 5th)

1. Brake No. 1 (B

1

)

2. Clutch No. 1 (C

1

)

No lock–up or No lock–up off

Torque converter clutch

AT–30

Harsh engagement (N 

→

 D)

1. Clutch No. 1 (C

1

)

2. One–way clutch No.3 (F

3

)

Harsh engagement (N 

→

 R)

1. Clutch No. 3 (C

3

)

2. Brake No. 4 (B

4

)

3. One–way clutch No.1 (F

1

)

Harsh engagement (1 

→

 2)

1. Brake No. 3 (B

3

)

2. One–way clutch No.1 (F

1

)

3. One–way clutch No. 2 (F

2

)

Harsh engagement (2 

→

 3)

Clutch No. 3 (C

3

)

Harsh engagement (3 

→

 4)

Clutch No. 2 (C

2

)

Harsh engagement (4 

→

 5th)

1. Brake No. 1 (B

1

)

2. Clutch No. 1 (C

1

)

Harsh engagement (Lock–up)

Torque converter clutch

AT–30

Slip or shudder (Forward and reverse: After warm–up)

1. One–way clutch No.1 (F

1

)

2. Clutch No. 3 (C

3

)

3. Torque converter clutch clutch

Slip or shudder (Particular position: Just after engine starts)

Torque converter clutch

AT–30

Slip or shudder (R position)

1. Brake No. 4 (B

4

)

2. One–way clutch No.1 (F

1

)

3. Clutch No. 3 (C

3

)

Slip or shudder (1st)

1. Clutch No. 1 (C

1

)

2. One–way clutch No.3 (F

3

)

Slip or shudder (2nd)

1. Clutch No. 1 (C

1

)

2. Brake No. 3 (B

3

)

3. One–way clutch No.1 (F

1

)

4. One–way clutch No.2 (F

2

)

Slip or shudder (3rd)

1. Clutch No. 1 (C

1

)

2. Clutch No. 3 (C

3

)

3. One–way clutch No.1 (F

1

)

Slip or shudder (4th)

1. Clutch No. 1 (C

1

)

2. Clutch No. 2 (C

2

)

Slip or shudder (5th)

1. Clutch No. 2 (C

2

)

2. Clutch No. 3 (C

3

)

3. Brake No. 1 (B

1

)

No engine braking (1st 

−

 4th: D position)

Clutch No. 1 (C

1

)

DI–558

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

752

No engine braking (1st: L position)

Brake No. 4 (B

4

)

No engine braking (2nd: 2 position)

Brake No. 2 (B

2

)

No engine braking (3rd: 3 position)

Brake No. 1 (B

1

)

Poor acceleration (All positions)

Torque converter clutch

AT–30

Poor acceleration (5th)

1. Clutch No. 1 (C

1

)

2. Clutch No. 3 (C

3

)

3. Brake No. 1 (B

1

)

4. Front planetary gear unit

Engine stalls when starting off or stopping

Torque converter clutch

AT–30