Toyota Tundra (2015 year). Manual — part 347
ETCS (Electric Throttle Control System)
Not system down
Transmission position
"D"
Duration time from shifting "N" to "D"
4 seconds or more
ECT
40°C (104°F) or higher
Spark advance from max. retard timing by KCS
control
0° crankshaft angle or more
Engine
Starting
OFF Malfunction (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
OFF Malfunction (B)
ECM selected gear
6th
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
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or
0.65 to 0.79
or
0.51 to 0.65
ON Malfunction (A)
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
ON Malfunction (B)
Current ECM selected gear
5th
Last ECM selected gear
4th
Vehicle speed (During transition from 4th to 5th gear)
Less than 100 km/h (62.2 mph)
ON Malfunction (C)
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
[OFF malfunction]
Turbine speed / Output speed (NT / NO)
0.93 or more, and 1.07 or less
(This means actual gear is 4th)
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OFF Malfunction (B)
Turbine speed / Output speed (NT / NO)
0.51 or more, and 0.65 or less
(This means actual gear is 6th)
[ON malfunction]
Turbine speed / Output speed (NT / NO)
1.28 or more, and 1.53 or less
(This means actual gear is 3rd)
ON Malfunction (B)
Turbine speed - Output speed x 4th gear ratio
(NT - NO x 4th gear ratio)
1000 rpm or more
ON Malfunction (C)
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
.
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.
(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
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A
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 SL2 turns ON/OFF normally when the shift lever is in D.
ECM gear shift command
1st
2nd
3rd
4th
5th
6th
Shift solenoid valve S3
ON
ON
ON
OFF
OFF
OFF
PROCEDURE
1.
CHECK DTC OUTPUT (IN ADDITION TO DTC P0761)
(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 P0761 is output
A
P0761 and other DTCs are output
B
HINT:
If any other codes besides P0761 are output, perform troubleshooting for those DTCs first.
B
GO TO DTC CHART
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