TOYOTA RAV4 2006 Service Repair Manual

U151E AUTOMATIC TRANSAXLE – FORWARD CLUTCHAX–255
AX
(d) Remove the forward clutch return spring from the
input shaft.
4. REMOVE FORWARD CLUTCH RETURN SPRING
SUB-ASSEMBLY
(a) Place the forward clutch drum onto the oil pump.
(b) Holding the forward clutch piston by hand, apply
compressed air (392 kPa, 4.0 kgf/cm
2, 57 psi) to the
oil pump to remove the forward clutch piston.
HINT:
When the piston cannot be removed because it is
slanted, blow air again with the protruding side
pushed, or remove the piston using needle nose
pliers with vinyl tape on the tip.
5. REMOVE INPUT SHAFT OIL SEAL RING
(a) Remove the input shaft oil seal ring from the input
shaft.
INSPECTION
1. INSPECT PACK CLEARANCE OF FORWARD
CLUTCH
(a) Install the forward clutch on the oil pump.
NOTICE:
Be careful not to damage the oil seal ring of the
oil pump.
(b) Using a dial indicator, measure the forward clutch
pack clearance while applying and releasing
compressed air (392 kPa, 4.0 kgf/cm
2, 57 psi).
Standard pack clearance:
1.00 to 1.25 mm (0.0394 to 0.4921 in.)
If the clearance is not as specified, inspect the
discs, plates and flange.
HINT:
If the opening is large, cover it with a piece of cloth
to prevent the compressed air from being released.
D026708E03
D003664E01
C056374E01
D026715E01

AX–256U151E AUTOMATIC TRANSAXLE – FORWARD CLUTCH
AX
2. INSPECT FORWARD MULTIPLE DISC CLUTCH DISC
(a) Check if the sliding surface of the disc, plate and
flange are worn or burnt.
If necessary, replace them.
NOTICE:
• If the lining of the disc comes off or is
discolored, or if a part of the groove is worn,
replace all the discs.
• Before installing new discs, immerse them in
ATF for at least 15 minutes.
3. INSPECT FORWARD CLUTCH RETURN SPRING
SUB-ASSEMBLY
(a) Using a vernier caliper, measure the free length of
the spring together with the spring seat.
Standard free length:
26.74 mm (1.0528 in.)
4. INSPECT FORWARD MULTIPLE DISC CLUTCH DISC
(a) Check if the disc lightly rotates when rotating the
forward clutch after inserting the multiple disc clutch
into it.
NOTICE:
Do not place the forward clutch in a vise.
REASSEMBLY
1. INSTALL INPUT SHAFT OIL SEAL RING
(a) Compress a new input shaft oil seal ring from both
sides to reduce dimension A.
Dimension A:
5.0 mm (0.197 in.)
(b) Coat the oil seal ring with ATF and install it to the
forward clutch drum.
NOTICE:
Do not expand the end gap of the oil seal ring
too much. Fix the hooks firmly.
2. INSTALL FORWARD CLUTCH PISTON SUB-
ASSEMBLY
(a) Coat the forward clutch piston with ATF, and install it
to the forward clutch drum.
NOTICE:
Be careful not to damage the lip of the forward
clutch piston.
D009189E01
D009211E03
D003672E01
D025587E01
D026707E02

U151E AUTOMATIC TRANSAXLE – FORWARD CLUTCHAX–257
AX
3. INSTALL FORWARD CLUTCH RETURN SPRING
SUB-ASSEMBLY
(a) Install the return spring to the forward clutch drum.
NOTICE:
After installing the spring, check that all of the
springs fit in the piston correctly.
(b) Coat the clutch balancer with ATF.
(c) Install the clutch balancer to the forward clutch
drum.
NOTICE:
• Be careful not to damage the lip of the
forward clutch balancer.
• Make sure that the clutch balancer is not
pinched and that there are no other defects
on the lip.
• Apply sufficient ATF to the sealing lip before
installation.
(d) Place SST on the clutch balancer, and compress
the clutch balancer with a press.
SST 09387-00020
(e) Install the snap ring with a snap ring expander.
(f) Be sure that the end gap of the snap ring is not
aligned with the spring retainer claw.
NOTICE:
• Stop the press when the spring seat is
lowered to a position 1 to 2 mm (0.039 to
0.078 in.) from the snap ring groove. This
prevents the spring seat from being
deformed.
• Do not expand the snap ring excessively.
(g) Set the end gap of the snap ring in the piston as
shown in the illustration.
NOTICE:
The end gap of the snap ring should not align
with any of the stoppers.
4. INSTALL FORWARD MULTIPLE DISC CLUTCH DISC
(a) Coat the 5 discs with ATF.
D026708E03
D026709E04
D026418E02
D026788E02

AX–258U151E AUTOMATIC TRANSAXLE – FORWARD CLUTCH
AX
(b) Install the 5 plates, 5 discs and flange to the forward
clutch drum.
NOTICE:
Make sure that the plates, discs, and flange are
installed as shown in the illustration.
(c) Using a screwdriver, install the snap ring.
(d) Check that the end gap of the snap ring is not
aligned with one of the cutouts.
NOTICE:
The snap ring should be fully engaged in the
groove of the drum.
5. INSPECT PACK CLEARANCE OF FORWARD
CLUTCH
(a) Using a dial indicator, measure the forward clutch
pack clearance while applying and releasing
compressed air (392 kgf/cm
2, 4.0 kPa, 57 psi).
Pack clearance:
1.00 to 1.25 mm (0.0394 to 0.4921 in.)
If the piston stroke is less than the minimum, parts
may be assembled incorrectly. Check and
reassemble the parts again.
If the clearance is not as specified, select another
flange.
HINT:
There are 5 different thicknesses of flanges
available.
Standard flange thickness
6. INSPECT FORWARD MULTIPLE DISC CLUTCH DISC
(See page AX-256)
D026415E01
D026753E01
D026715E01
No. Thickness No. Thickness
1 3.00 mm (0.1181
in.)4 3.45 mm (0.1358
in.)
2 3.15 mm (0.1240
in.)5 3.60 mm (0.1417
in.)
3 3.30 mm (0.1299
in.)--

AX–6U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
SYSTEM DIAGRAM
The configuration of the electronic control system in the
U151F automatic transaxle is as shown in the following chart.
C136233E01

U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–7
AX
C116585E02

AX–8U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
C136234E01

U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–9
AX
C136235E01

AX–10U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
SYSTEM DESCRIPTION
1. SYSTEM DESCRIPTION
(a) The Electronic Controlled Automatic Transaxle
(ECT) is an automatic transaxle that electronically
controls shift timing using the Engine Control
Module (ECM). The ECM detects electrical signals
that indicate engine and driving conditions, and
controls the shift point based on driver habits and
road conditions. As a result, fuel efficiency and
power transaxle performance are improved.
Shift shock is reduced by controlling the engine and
transaxle simultaneously.
In addition, the ECT has the following features:
• Diagnostic function.
• Fail-safe function when a malfunction occurs.

U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–11
AX
HOW TO PROCEED WITH
TROUBLESHOOTING
HINT:
• The ECM of this system is connected to the CAN and
multiplex communication system. Therefore, before
starting troubleshooting, make sure to check that there is
no trouble in the CAN and multiplex communication
systems.
• *: Use the intelligent tester.
NEXT
NEXT
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery
before proceeding.
NEXT
NEXT
(a) Refer to the DTC CHECK / CLEAR (see page AX-33).
NEXT
NEXT
(a) Refer to the CHECK MODE PROCEDURE (see page
AX-34).
1VEHICLE BROUGHT TO WORKSHOP
2CUSTOMER PROBLEM ANALYSIS
3INSPECT BATTERY VOLTAGE
4CONNECT INTELLIGENT TESTER TO DLC3*
5CHECK AND CLEAR DTCS AND FREEZE FRAME DATA*
6VISUAL INSPECTION
7SETTING CHECK MODE DIAGNOSIS*