Toyota Tundra (2015 year). Manual — part 453
OK
Text in Illustration
*a
Component without harness connected
(Shift Solenoid Valve S1)
NG
REPLACE SHIFT SOLENOID VALVE S1
4.
INSPECT TRANSMISSION VALVE BODY ASSEMBLY
(a) Check the transmission valve body assembly.
OK:
There are no foreign objects on each valve.
NG
REPAIR OR REPLACE TRANSMISSION VALVE BODY
ASSEMBLY
OK
REPAIR OR REPLACE AUTOMATIC TRANSMISSION
ASSEMBLY
A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000000W800DLX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: P0756; Shift Solenoid "B"
Performance (Shift Solenoid Valve S2); 2015 MY Tundra [08/2014 - ]
DTC
P0756
Shift Solenoid "B" Performance (Shift Solenoid Valve S2)
DESCRIPTION
The ECM uses signals from the output shaft speed sensor and input speed sensor to detect the actual gear
position (1st, 2nd, 3rd, 4th, 5th or 6th gear).
Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical
CODE
DTC DETECTION CONDITION
TROUBLE AREA
P0756
S2 stuck ON malfunction*1:
Shifting to 3rd and 5th gears is impossible.
The ECM determines there is a malfunction when the
following conditions are both met (2-trip detection
logic):
(a) When the ECM directs the transmission to switch to 5th
gear, the actual gear is shifted to 6th.
(b) When the ECM directs the transmission to switch to 6th
gear, the actual gear is shifted to 6th.
Shift solenoid valve S2
remains closed
Valve body is blocked
Automatic transmission
(clutch, brake, gear, etc.)
P0756
S2 stuck OFF malfunction*2:
The vehicle starts in 3rd gear and shifting to 6th gear is
impossible.
The ECM determines there is a malfunction when the
following conditions are both met (2-trip detection
logic):
(a) When the ECM directs the transmission to switch to 1st
gear, the actual gear is shifted to 3rd.
(b) When the ECM directs the transmission to switch to 6th
gear, the actual gear is shifted to 5th.
Shift solenoid valve S2
remains open
Shift solenoid valve SLT
remains open or closed
Valve body is blocked
Automatic transmission
(clutch, brake, gear, etc.)
HINT:
1st
2nd
3rd
4th
5th
6th
*1: Actual gear position under S2 stuck ON malfunction
1st
2nd
2nd
4th
6th
6th
*2: Actual gear position under S2 stuck OFF malfunction
3rd
3rd
3rd
4th
5th
5th
MONITOR DESCRIPTION
A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...
by the ECM and the actual gear position are not the same, the ECM illuminates the MIL and stores the DTC.
MONITOR STRATEGY
Related DTCs
P0756: Shift solenoid valve S2/Functional check
Required sensors/Components
Shift solenoid valve S2
Duration
0.4 seconds
MIL operation
2 driving cycles
TYPICAL ENABLING CONDITIONS
All
The monitor will run whenever the following DTCs
are not present
P0717 (Turbine speed sensor circuit)
P0500 (Output speed sensor circuit)
P0327, P0328, P032C, P032D, P0332, P0333, P033C, P033D
(KCS sensor circuit)
Shift solenoid valve S1 circuit
Not circuit malfunction
Shift solenoid valve S2 circuit
Not circuit malfunction
Shift solenoid valve S3 circuit
Not circuit malfunction
Shift solenoid valve S4 circuit
Not circuit malfunction
Shift solenoid valve SR circuit
Not circuit malfunction
Shift solenoid valve SL1 circuit
Not circuit malfunction
Shift solenoid valve SL2 circuit
Not circuit malfunction
ECT (Engine Coolant Temperature) sensor circuit
Not circuit malfunction
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
Transfer position
HIGH*
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
3.30 to 7.50
or
A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...
NO: Internal counter shaft speed
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
HINT:
*: Following conditions are met
Vehicle speed sensor "A" circuit
Not circuit malfunction
Output shaft speed sensor circuit
Not circuit malfunction
Transfer output speed
143 rpm or more
Transfer input speed / Transfer output speed (NO / NOtf)
0.9 or more, and less than 1.1
OFF 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
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)
ON Malfunction (A)
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)
ON 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)
A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...
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