Toyota Tundra (2015 year). Manual — part 429
Last Modified: 9-16-2014
6.6 D
Doc ID: RM000000W7A0TRX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: MECHANICAL SYSTEM TESTS;
2015 MY Tundra [08/2014 - ]
MECHANICAL SYSTEM TESTS
1. STALL SPEED TEST
HINT:
Do not perform the stall speed test for more than 5 seconds.
(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 / Data List.
(e) Run the vehicle until the transmission fluid temperature is between 50 and 80°C (122 and 176°F).
(f) Allow the engine to idle with the air conditioning off.
(g) Chock all 4 wheels.
(h) Set the parking brake and keep the brake pedal depressed firmly with your left foot.
(i) Move the shift lever to D.
(j) Depress the accelerator pedal as much as possible with your right foot.
(k) Read the engine speed (stall speed) and release the accelerator pedal immediately.
Standard value:
2300 +/-200 rpm
Evaluation
TEST RESULT
POSSIBLE CAUSE
Stall speed is lower than
standard value
Stator one-way clutch is not operating properly
Torque converter is faulty (stall speed is less than standard value
by 600 rpm or more)
Engine power may be insufficient
Stall speed is higher than
standard value
Line pressure is low
C1 clutch is slipping
F3 one-way clutch is not operating properly
F4 one-way clutch is not operating properly
NOTICE:
A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...
Perform the test while the ATF temperature is 50 to 80°C (122 to 176°F).
2. SHIFT TIME LAG TEST
HINT:
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Data List.
(e) Run the vehicle until the transmission fluid temperature is between 50 and 80°C (122 and 176°F).
(f) Allow the engine to idle with the air conditioning off.
(g) Set the parking brake and keep the brake pedal depressed firmly.
(h) Check the D position time lag.
(1) Move the shift lever to N and wait for 1 minute.
(2) Move the shift lever to D and measure the time until the shock is felt.
(1) Move the shift lever to N and wait for 1 minute.
(2) Move the shift lever to R and measure the time until the shock is felt.
D position time lag is less than 1.2 seconds
R position time lag is less than 1.5 seconds
Evaluation
TEST RESULT
POSSIBLE CAUSE
D position time lag exceeds standard value
Line pressure is low
C1 clutch is worn
F3 one-way clutch is not operating properly
F4 one-way clutch is not operating properly
R position time lag exceeds standard value
Line pressure is low
C3 clutch is worn
B4 brake is worn
F1 one-way clutch is not operating properly
A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...
Last Modified: 9-16-2014
6.6 D
Doc ID: RM000000W7B0SHX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: HYDRAULIC TEST; 2015 MY
Tundra [08/2014 - ]
HYDRAULIC TEST
1. PERFORM HYDRAULIC TEST
(a) Measure the line pressure.
CAUTION:
The line pressure test should always be performed with at least 2 people. One person should observe the
(2) Turn the ignition switch off.
(3) Lift the vehicle up.
Text in Illustration
*1
Test Plug
SST: 09992-00095
09992-00231
09992-00271
(5) Lower the vehicle.
(6) Fully apply the parking brake and chock the 4 wheels.
(7) Start the engine and check the idling speed.
(8) Keep your left foot pressed firmly on the brake pedal and move the shift lever to D.
(9) Measure the line pressure when the engine is idling.
(10) Fully depress the accelerator pedal with your right foot. Quickly read the highest line pressure when
A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...
the engine speed reaches the stall speed.
(11) In the same manner, perform the test with the shift lever in R.
Specified Line Pressure
CONDITION
D POSITION
R POSITION
Stall speed
1280 to 1460 kPa
(13.1 to 14.9 kgf/cm
2
, 186 to 212 psi)
1180 to 1400 kPa
(12.0 to 14.3 kgf/cm
2
, 171 to 203 psi)
Evaluation
PROBLEM
POSSIBLE CAUSE
Measured values at both positions are higher than specified
pressure
Shift solenoid valve SLT
defective
Regulator valve defective
Measured values at both positions are lower than specified
pressure
Shift solenoid valve SLT
defective
Regulator valve defective
Oil pump defective
Pressure is low in D only
D position circuit fluid leak
Clutch No. 1 (C1) defective
Pressure is low in R only
R position circuit fluid leak
Clutch No. 3 (C3) defective
Brake No. 4 (B4) defective
A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISS...
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