Toyota Tundra (2015 year). Manual — part 352
Condition (A)
ECM selected gear
2nd
Vehicle speed
2 km/h (1.2 mph) or more
Output speed
2nd → 1st down-shift point or more
Throttle valve opening angle
6.6% or more at 2000 rpm
(Conditions vary with engine speed)
Calculated load value
7.75% or more (A/C off)
7.75% or more (A/C on)
Input speed/output speed (NT/NO)
NT: Input (Turbine) speed
NO: Internal counter shaft speed
3.30 to 7.50
or
1.91 to 2.35
or
1.28 to 1.53
or
0.93 to 1.07
or
0.65 to 0.79
or
0.51 to 0.65
Condition (B)
ECM selected gear
4th
Vehicle speed
2 km/h (1.2 mph) or more
Throttle valve opening angle
6.6% or more at 2000 rpm
(Conditions vary with engine speed)
Calculated load value
7.75% or more (A/C off)
7.75% or more (A/C on)
Input speed/output speed (NT/NO)
NT: Input (Turbine) speed
NO: Internal counter shaft speed
3.30 to 7.50
or
1.91 to 2.35
or
1.28 to 1.53
or
0.93 to 1.07
or
0.65 to 0.79
or
0.51 to 0.65
Condition (C)
Current ECM selected gear
5th
Last ECM selected gear
4th
A760E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMIS...
Vehicle speed (During transition from 4th to 5th gear)
Less than 100 km/h (62.2 mph)
Condition (D)
ECM selected gear
5th
Engine speed -Turbine speed (NE - NT) (After transition to 5th gear)
150 rpm or less
Vehicle speed (After transition to 5th gear)
Less than 100 km/h (62.2 mph)
TYPICAL MALFUNCTION THRESHOLDS
Turbine speed / Output speed (NT / NO)
3.30 or more, and 7.50 or less
(This means actual gear is 1st)
Condition (B)
Turbine speed / Output speed (NT / NO)
1.28 or more, and 1.53 or less
(This means actual gear is 3rd)
Condition (C)
Turbine speed - Output speed x 4th gear ratio
(NT - NO x 4th gear ratio)
1000 rpm or more
Condition (D)
Turbine speed - Output speed x 5th gear ratio
(NT - NO x 5th gear ratio)
1000 rpm or more
INSPECTION PROCEDURE
NOTICE:
Perform the universal trip to clear permanent DTCs
.
PROCEDURE
1.
CHECK DTC OUTPUT (IN ADDITION TO DTC P0781)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(e) Read the DTCs using the Techstream.
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A
Result
RESULT
PROCEED TO
Only P0781 is output
A
P0781 and other DTCs are output
B
HINT:
If any other codes besides P0781 are output, perform troubleshooting for those DTCs first.
B
GO TO DTC CHART
2.
PERFORM ACTIVE TEST USING TECHSTREAM (RUNNING TEST)
HINT:
Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be
operated without removing any parts. This non-intrusive functional inspection can be very useful because
intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early
in troubleshooting is one way to save diagnostic time. Data List information can be displayed while
performing Active Tests.
(a) Warm up the engine.
(b) Turn the ignition switch off.
(c) Connect the Techstream to the DLC3.
(d) Turn the ignition switch to ON.
(e) Turn the Techstream on.
(f) Enter the following menus: Powertrain / Engine and ECT / Active Test.
(g) According to the display on the Techstream, perform the Active Test.
HINT:
While driving, the shift position can be forcibly changed with the Techstream.
Engine and ECT
TESTER
DISPLAY
TEST PART
CONTROL RANGE
DIAGNOSTIC NOTE
Control the
Shift Position
Operate shift solenoid valves
and set each shift position
Press "→"
button: Shift up
Press "←"
button: Shift
down
Possible to check operation of
the shift solenoid valves.
[Vehicle Condition]
50 km/h (30 mph) or less
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OK
OK
HINT:
1st
2nd
3rd
4th
5th
6th
Actual gear position under malfunction
1st
1st
3rd
3rd
N*
N*
N*: Neutral
OK:
Gear position changes in accordance with the Techstream command.
NG
REPAIR OR REPLACE TRANSMISSION VALVE BODY
ASSEMBLY
3.
PERFORM ACTIVE TEST USING TECHSTREAM (SHIFT SOLENOID VALVE SLT)
NG
REPLACE SHIFT SOLENOID VALVE SLT
4.
CLEAR DTC AND PERFORM RUNNING TEST
NG
REPAIR OR REPLACE AUTOMATIC TRANSMISSION
ASSEMBLY
OK
END
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