-
DIAGNOSTICS
AUTOMATIC TRANSAXLE
DI-173
327
Author:
Date:
2001 SIENNA (RM787U)
Chapter 3: Off-vehicle repair
(
: A541E automatic transaxle repair manual Pub. No. RM326U)
Symptom
Suspect Area
See page
Vehicle does not move in any forward position and reverse posi-
tion
1. Front and rear planetary gear
2. O/D planetary gear
3. O/D one-way clutch (F
0
)
4. O/D direct clutch (C
0
)
5. Forward clutch (C
1
)
6. O/D brake (B
0
)
Vehicle does not move in R position
1. Front and rear planetary gear unit
2. Direct clutch (C
2
)
3. O/D direct clutch (C
0
)
4. 1st & reverse brake (B
3
)
No up-shift (1st
→
2nd)
1. No. 1 one-way clutch (F
1
)
2. 2nd brake (B
2
)
No up-shift (2nd
→
3rd)
Direct clutch (C
2
)
No up-shift (3rd
→
O/D)
O/D brake (B
0
)
No lock-up or No lock-up off
Torque converter clutch
Harsh engagement (N
→
D)
1. Forward clutch (C
1
)
2. O/D one-way clutch (F
0
)
3. No. 2 one-way clutch (F
2
)
Harsh engagement (N
→
R)
1. Direct clutch (C
2
)
2. 1st & reverse brake (B
3
)
Harsh engagement (Lock-up)
Torque converter clutch
Slip or shudder (Forward position: After warm-up)
1. Torque converter clutch
2. O/D direct clutch (C
0
)
3. Forward clutch (C
1
)
4. O/D one-way clutch (F
0
)
Slip or shudder (R position)
1. Direct clutch (C
2
)
2. 1st & reverse brake (B
3
)
3. O/D direct clutch (C
0
)
Slip or shudder (1st)
No. 2 one-way clutch (F
2
)
Slip or shudder (2nd)
1. No. 1 one-way clutch (F
1
)
2. 2nd brake (B
2
)
Slip or shudder (3rd)
Direct clutch (C
2
)
Slip or shudder (O/D)
O/D brake (B
0
)
No engine braking (1st
∼
3rd: D position)
2nd brake (B
2
)
No engine braking (1st: L position)
1st & reverse brake (B
3
)
No engine braking (2nd: 2 position)
2nd coast brake (B
1
)
Poor acceleration (All position)
1. Torque converter clutch
2. O/D planetary gear
Poor acceleration (O/D)
1. O/D direct clutch (C
0
)
2. O/D planetary gear
Large shift shock or engine stalls when starting off or stopping
Torque converter clutch
