Toyota Tundra (2015 year). Manual — part 452
ECM selected gear
6th
Engine speed - Turbine speed (NE - NT) (After transition from 5th to 6th gear) 150 rpm or less
Vehicle speed (After transition from 5th to 6th gear)
Less than 100 km/h (62.2 mph)
ON Malfunction (A)
ECM selected gear
1st
Vehicle speed
2 km/h (1.2 mph) or more and less than 40 km/h (24.9 mph)
Engine speed - Turbine speed (NE - NT)
50 rpm or more
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
ON Malfunction (B)
ECM selected gear
5th
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
TYPICAL MALFUNCTION THRESHOLDS
[OFF malfunction]
A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...
Turbine speed / Output speed (NT / NO)
0.65 or more, and 0.79 or less
(This means actual gear is 5th)
OFF Malfunction (B)
Turbine speed - Output speed x 5th gear ratio
(NT - NO x 5th gear ratio)
1000 rpm or more
OFF Malfunction (C)
Turbine speed - Output speed x 6th gear ratio
(NT - NO x 6th gear ratio)
1000 rpm or more
[ON malfunction]
1st detection: temporary flag ON
2nd detection: pending fault code ON
ON Malfunction (A)
Turbine speed / Output speed (NT / NO)
1.91 or more, and 2.35 or less
(This means actual gear is 2nd)
ON Malfunction (B)
Turbine speed / Output speed (NT / NO)
0.65 or more, and 0.79 or less
(This means actual gear is 5th)
INSPECTION PROCEDURE
NOTICE:
Perform the universal trip to clear permanent DTCs
.
1. ACTIVE 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.
A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...
(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.
Comparing the shift position commanded by the Active Test with the actual shift position enables you to
confirm the problem
.
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
HINT:
This test can be conducted when the vehicle speed is 50 km/h (30 mph) or less.
The 4th to 5th and 5th to 6th up-shifts must be performed with the accelerator pedal released.
The 6th to 5th and 5th to 4th down-shifts must be performed with the accelerator pedal released.
Do not operate the accelerator pedal for at least 2 seconds after shifting and do not shift successively.
The shift position commanded by the ECM is shown in the Data List display on the Techstream.
The shift solenoid valve S1 turns ON/OFF normally when the shift lever is in D.
ECM gear shift command
1st
2nd
3rd
4th
5th
6th
Shift solenoid valve S1
OFF
ON
ON
ON
ON
ON
PROCEDURE
1.
CHECK DTC OUTPUT (IN ADDITION TO DTC P0751)
(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.
Result
RESULT
PROCEED TO
Only P0751 is output
A
P0751 and other DTCs are output
B
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A
OK
HINT:
If any other codes besides P0751 are output, perform troubleshooting for those DTCs first.
B
GO TO DTC CHART
2.
PERFORM ACTIVE TEST USING TECHSTREAM (SHIFT SOLENOID VALVE SLT)
NG
REPLACE SHIFT SOLENOID VALVE SLT
3.
INSPECT SHIFT SOLENOID VALVE S1
(a) Remove shift solenoid valve S1.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
CONDITION SPECIFIED CONDITION
Shift solenoid valve S1 connector terminal - Shift solenoid valve S1 body
20°C (68°F)
11 to 15 Ω
(c) Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an
operating noise.
OK:
MEASUREMENT CONDITION
SPECIFIED CONDITION
Battery positive (+) → Shift solenoid valve S1 connector
Battery negative (-) → Shift solenoid valve S1 body
Valve moves and makes an operating noise
A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...
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