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Toyota Tundra (2015 year). Manual - part 455

Last Modified: 9-16-2014

6.6 C

Doc ID: RM000000W81075X

Model Year: 2015

Model: Tundra

Prod Date Range: [08/2014 - ]

Title: A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: P0761; Shift Solenoid "C"

Performance (Shift Solenoid Valve S3); 2015 MY Tundra [08/2014 - ]

DTC

P0761

Shift Solenoid "C" Performance (Shift Solenoid Valve S3)

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

P0761

S3 stuck ON malfunction*1:

When the ECM directs the transmission to switch to 5th

or 6th gear, the engine overruns (clutch slips).

The ECM determines there is a malfunction when either

(a) When the ECM directs the transmission to switch to 4th

gear, the actual gear is shifted to 3rd.

(b) When the ECM directs the transmission to switch to 5th

gear, the engine overruns (clutch slips).

Shift solenoid valve S3

remains closed

Shift solenoid valve SLT

remains closed

Valve body is blocked

Automatic transmission

(clutch, brake, gear, etc.)

P0761

S3 stuck OFF malfunction*2:

Shifting to 1st, 2nd and 3rd 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 2nd

gear, the actual gear is shifted to 4th.

(b) When the ECM directs the transmission to switch to 6th

gear, the actual gear is shifted to 6th.

Shift solenoid valve S3

remains open

Valve body is blocked

Automatic transmission

(clutch, brake, gear, etc.)

HINT:

1st

2nd

3rd

4th

5th

6th

*1: Actual gear position under S3 stuck ON malfunction

1st

2nd

3rd

*2: Actual gear position under S3 stuck OFF malfunction

3rd

4th

5th

6th

N*: Neutral

Gear position during fail-safe operation:

A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...

If any malfunction is detected, the ECM changes into the fail-safe mode to shift into the gear

positions as shown in the table below.

Gear position under normal conditions

1st 2nd 3rd 4th 5th 6th

*1: Actual gear position under fail-safe mode during S3 stuck ON
malfunction

1st 2nd 3rd 3rd 3rd 3rd

*2: Actual gear position under fail-safe mode during S3 stuck OFF
malfunction

3rd 4th 4th 4th 5th 6th

MONITOR DESCRIPTION

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

P0761: Shift solenoid valve S3/Functional check

Required sensors/Components

Shift solenoid valve S3

Duration

OFF malfunction (A), (B) and ON malfunction (A)

0.4 seconds

ON malfunction (B)

3 seconds

ON malfunction (C)

1 second

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

A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...

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*

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

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

1.91 to 2.35

1.28 to 1.53

0.93 to 1.07

0.65 to 0.79

0.51 to 0.65

OFF Malfunction (B)

ECM selected gear

6th

Vehicle speed

2 km/h (1.2 mph) or more

A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...

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

1.91 to 2.35

1.28 to 1.53

0.93 to 1.07

0.65 to 0.79

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

1.91 to 2.35

1.28 to 1.53

0.93 to 1.07

0.65 to 0.79

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

A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...

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