Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2006SEQUOIA 4WD V8-4.7L (2UZ-FE)REPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINTRANSMISSION CONTROL SYSTEMSTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSMECHANICAL SYSTEM TESTS
2006 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)
Mechanical System Tests
2006 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)SECTION Mechanical System Tests
MECHANICAL SYSTEM TESTS
1. STALL SPEED TEST
HINT: This test is to check the overall performance of the engine and transmission.
NOTICE:
- Do not perform the stall speed test longer than 5 seconds.
- To ensure safety, perform this test in an open and level area that provides good traction.
- The stall speed test should always be performed with at least 2 people. One person should observe the condition of the wheels and wheel chocks while the other is performing the test.
a. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
b. Run the vehicle until the transmission fluid temperature has reached 50 to 80°C (122 to 176°F).
c. Allow the engine to idle with the air conditioning OFF.
d. Chock all 4 wheels.
e. Set the parking brake and keep the brake pedal depressed firmly with your left foot.
f. Shift the shift lever into the drive position.
g. Depress the accelerator pedal as much as possible with your right foot.
h. Read the engine rpm (stall speed) and release the accelerator pedal immediately
Standard value: 2,050 to 2,350 rpm
2. SHIFT TIME LAG TEST
HINT: This test is to check the condition of the direct clutch, forward clutch, 1st brake and reverse brake.
a. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
b. Run the vehicle until the transmission fluid temperature has reached 50 to 80°C (122 to 176°F).
c. Allow the engine to idle with the air conditioning OFF.
d. Set the parking brake and keep the brake pedal depressed firmly
e. Check the D range time lag.
1. Shift the shift lever into the N position and wait for 1 minute.
2. Shift the shift lever into the D position and measure the time until the shock is felt.
3. Repeat the 2 procedures above 3 times, and calculate the average time of the 3 tests.
f. Check the R range time lag.
1. Shift the shift lever into the N position and wait for 1 minute.
2. Shift the shift lever into the R position and measure the time until the shock is felt.
3. Repeat the 2 procedures above 3 times, and calculate the average time of the 3 tests.
Standard value:
D range time lag is less than 1.2 seconds
R range time lag is less than 1.5 seconds
1. STALL SPEED TEST
HINT: This test is to check the overall performance of the engine and transmission.
NOTICE:
- Do not perform the stall speed test longer than 5 seconds.
- To ensure safety, perform this test in an open and level area that provides good traction.
- The stall speed test should always be performed with at least 2 people. One person should observe the condition of the wheels and wheel chocks while the other is performing the test.
a. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
b. Run the vehicle until the transmission fluid temperature has reached 50 to 80°C (122 to 176°F).
c. Allow the engine to idle with the air conditioning OFF.
d. Chock all 4 wheels.
e. Set the parking brake and keep the brake pedal depressed firmly with your left foot.
f. Shift the shift lever into the drive position.
g. Depress the accelerator pedal as much as possible with your right foot.
h. Read the engine rpm (stall speed) and release the accelerator pedal immediately
Standard value: 2,050 to 2,350 rpm
Evaluation:
2. SHIFT TIME LAG TEST
HINT: This test is to check the condition of the direct clutch, forward clutch, 1st brake and reverse brake.
a. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
b. Run the vehicle until the transmission fluid temperature has reached 50 to 80°C (122 to 176°F).
c. Allow the engine to idle with the air conditioning OFF.
d. Set the parking brake and keep the brake pedal depressed firmly
e. Check the D range time lag.
1. Shift the shift lever into the N position and wait for 1 minute.
2. Shift the shift lever into the D position and measure the time until the shock is felt.
3. Repeat the 2 procedures above 3 times, and calculate the average time of the 3 tests.
f. Check the R range time lag.
1. Shift the shift lever into the N position and wait for 1 minute.
2. Shift the shift lever into the R position and measure the time until the shock is felt.
3. Repeat the 2 procedures above 3 times, and calculate the average time of the 3 tests.
Standard value:
D range time lag is less than 1.2 seconds
R range time lag is less than 1.5 seconds
Evaluation:
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.