Toyota ZZT230 series, Repair Manual

Page: 376 / 821

)
)
DIAGNOSTICS
AUTOMATIC TRANSAXLE
(3) Hold in position and tighten the bolt.
Torque:
5.4
N·m
(55
kgf.cm,
48
ln·lbf)
Of-165
For continuity inspection of the park/neutral position
switch, see page
01-202.
(g)
Check the idle speed.
Idle speed:
650 :t 50
rpm
(In N position and air conditioner OFF)
7.
MECHANICAL SYSTEM TESTS
(a) Measure the stall speed.
The
object of this test is to check the overall performance of the transaxle and engine by measuring
the
stall speeds in the D and
A
positions.
NOTICE:
•
Do
the test at normal operating fluid temperature
50 - 80
·c
(122 - 176 "F).
•
Do
not continuously run this test longer than
1 o
seconds.
•
To ensure safety, conduct this test In a wide, clear level area which provides good traction.
•
The stall test should always be carried out In pairs. One technician should observe
the condi­
tions of wheels or wheel stoppers outside the vehicle while the other Is doing the t
e
st.
(1) Chock the 4
wheels.
(2) Connect an OBD II scan tool or
TOYOTA
hand-held tester to DLC3.
(3)
Fully apply the parking brake.
(4)
Keep your left foot pressed firmly on the brake pedal.
(5)
Start
the engine.
(6}
Shift
into the D position. Press all the way down on the accelerator pedal with your right foot.
Quickly read the stall speed at this time.
Stall speed:
2,370
:t
150
rpm
Evaluation:
Problem
{a) Stall speed
low
in D and
A
positions
(b)
Stall speed
h".gh
i
n
D position
(e)
Stall speed high in R position
(d) Stall speed high
in 0
and A
posilions
{b) Measure the ttme lag.
Possible cause
• Engine output may be Insufficient
•Stator one-way
cl
u
tch Is
operating properly
HINT: If more than
600
rpm below the speci!ied value. the lorque
converter clutch
oould
be faulty.
•Une pressure too low
•Forward clutch slfppirl(l
•No.2 one-way
clutch
not operating properly
•OlD clutch slipping
•Une pressure too row
• Direct dutch slipping
•lsi
&
reverse brake slipping
•OlD clutch slipping
•
Une
pressure too
low
•Improper fluid level
•DID one-way clutch not operaling properly
When the shift lever is shifted while the engine is idling, there will be a certain time lapse or lag before
the shock can be felt. This is used for checking the condition of the 0/D direct clutch, forward clutch,
and 1 st
& reverse brake.
NOTICE:
•
•
•
Do the test at normal operating fluid temperature
50-80
oC
(122 - 176
°F)
.
Be
sure to allow
1
minute Interval between tests .
Take
3
measurements and take the average value .
(1) Connect an OBD II scan tool or
TOYOTA
hand-held tester to DLC3.