−
DIAGNOSTICS
AUTOMATIC TRANSMISSION
DI
−
135
1996 LAND CRUISER (RM451U)
HINT:
If your display shows ”UNABLE TO CONNECT TO VEHICLE”
when you have connected the cable of the OBD II scan tool or
TOYOTA hand
−
held tester to the DLC3, turned the ignition
switch ON and operated the scan tool, there is a problem on the
vehicle side or tool side.
S
If communication is normal when the tool is connected to
another vehicle, inspect the DLC3 on the original vehicle.
S
If communication is still not possible when the tool is con-
nected to another vehicle, the problem is probably in the
tool itself, so consult the Service Department listed in the
tool’s instruction manual.
4.
CHECK FOR INTERMITTENT PROBLEMS
TOYOTA hand
−
held tester only:
By putting the vehicle’s ECM in the check mode, 1 trip detection logic is possible instead of 2 trip detection
logic and sensitivity to detect open circuits is increased. This makes it easier to detect intermittent problems.
(1)
Clear the DTC (See step 3).
(2)
Set the check mode (See step 3).
(3)
Do a simulation test (See page
IN
−
18
).
(4)
Check the cnnector connection and terminal (See page
IN
−
28
).
(5)
Visual check and contact pressure (See page
IN
−
28
).
(6)
Handle the connector (See page
IN
−
28
).
5.
ROAD TEST
NOTICE:
Perform the test at normal operating ATF temperature 50
−
80
°
C (122
−
176
°
F).
(a)
D position test in NORM and PWR pattern positions.
Shift into the D position and hold the accelerator pedal constant at the full throttle valve opening posi-
tion and check the following:
HINT:
When the 2nd start switch in on, there is no 1
→
2 up
−
shift and 2
→
1 down
−
shift.
(1)
1
→
2, 2
→
3 and 3
→
O/D up
−
shift takes place, and shift point should conform to those shown
in the automatic shift schedule. Conduct a test under both Normal and Power patterns.
HINT:
There is no O/D up
−
shift or lock
−
up when the coolant temperature is below 55
°
C (131
°F
).
Evaluation:
S
If there is no 1
→
2 up
−
shift:
Shift solenoid valve No. 2 is stuck.
1
−
2 shift valve is stuck.
S
If there is no 2
→
3 up
−
shift:
Shift solenoid valve No. 1 is stuck.
2
−
3 shift valve is stuck.
S
If there is no 3
→
O/D up
−
shift:
3
−
4 shift valve is stuck.
S
If the shift point is defective:
Throttle valve, 1
−
2 shift valve, 2
−
3 shift valve, 3
−
4 shift valve etc., are defective.
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Version 1.00 - 12/21/2010
