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ON-VEHICLE SERVICE (AW30 –40LE) 7A3-5
Speed Change and Lock-Up Pattern
If you select a speed as shown below by specifying
respective positions of transmission shift lever, transfe
r
switch and pattern select switch, the transmission
control computer controls speed change and lock-up
operations based on the specified pattern in accordance
with the degree of throttle opening and vehicle speed.
Pattern select sw. position Transmission shift position
D 3 2 L
NORMAL, POWER 1st
[2nd]
[3rd]
[O/D] 1st
[2nd]
[3rd] 1st
2nd(3rd) 1st(2nd)
3rd START 3rd fixing — —
[ ]: The lock-up operation is available.
( ): Transmission is shifted at high speed to prevent overrun.
Overdrive and Lock-Up Operating Conditions
The overdrive and lock-up clutch operate if the following
conditions are satisfied.
Overdrive Lock-up clutch
Shift pattern position
NORMAL NORMAL
Transmission shift position
D range
Brake lamp switch
— OFF
Throttle opening
Fully closed Except fully closed
Accelerator About 52 km/h (32 mph) or more 2nd: About 76 km/h (47 mph) or
more
Vehicle speed Deceleration About 42 km/h (26 mph) or more 3rd: About 56 km/h (35 mph) or more
O/D: About 67 km/h (42 mph) or
more
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7A3-6 ON-VEHICLE SERVICE (AW30 –40LE)
Diagnosis
Basic Troubleshooting
AW30
–40LE transmission, with Transmission Control
Module (TCM), differs from the Mechanical – Hydraulic
control type transmissions. Accordingly, its
troubleshooting procedure differs also.
Before troubleshooting an TCM, first determine whethe
r
the problem is electrical or mechanical. To do this, just
refer to the basic troubleshooting flowchart provided
below.
If the cause is already known, using the basic
troubleshooting chart below along with the
troubleshooting chart should speed the procedure.
F07R200005-X
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ON-VEHICLE SERVICE (AW30 –40LE) 7A3-7
Troubleshooting Chart
Numbers are arranged in order of probability.
Perform inspections starting with number one and
working up.
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7A3-8 ON-VEHICLE SERVICE (AW30 –40LE)
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ON-VEHICLE SERVICE (AW30 –40LE) 7A3-9
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7A3-10 ON-VEHICLE SERVICE (AW30 –40LE)
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ON-VEHICLE SERVICE (AW30 –40LE) 7A3-11
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7A3-12 ON-VEHICLE SERVICE (AW30 –40LE)
Manual Shifting Test
NOTE: With this test, it can be determined whether the
trouble lies within the electrical circuit or is a mechanical
problem in the transmission.
1. Disconnect TCM connector
Inspect manual driving operation
2. Inspect manual driving operation
Check that the shift and gear positions correspond
with the table.
If the “L", “2", “3" and “D" range gear positions are
difficult to distinguish, do perform the following road
test.
While driving, shift through the “L", “2", “3" and “D"
ranges. Check that the gear change corresponds to
the gear position.
If any abnormality is found in the above test, do
perform the stall, time lag or gear change tests.
RUW37ASH004101
3. Connect TCM connector
With the engine off, connect the TCM connector.
Stall Test
RUW37ALH000101
The object of this test is to check the overall
performance of the transmission and engine b
y
measuring the maximum engine speeds at the “D" and
“ R" ranges.
NOTE:
1. Perform the test at normal operation fluid
temperature (50 – 80
C or 122 – 176
F).
2. Do not continuously run this test longer than 5 seconds.