- Shift solenoid valve SLT defective
- Regulator valve defective
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000YIYC |
| Model Year Start: 2017 | Model: Sienna | Prod Date Range: [08/2016 - ] |
| Title: UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: HYDRAULIC TEST; 2017 - 2020 MY Sienna [08/2016 - ] | ||
HYDRAULIC TEST
PERFORM HYDRAULIC TEST
(a) Measure the line pressure.
CAUTION:
A line pressure test should always be carried out with at least 2 people. One person should observe the condition of wheels and wheel chocks while the other is performing the test.
NOTICE:
- Perform this test with the ATF (Automatic Transaxle Fluid) at the normal operating temperature: 50 to 80°C (122 to 176°F)
- Be careful to prevent the SST hose from contacting the exhaust pipe.
- This check must be conducted after checking and confirming that the engine is normal.
- Perform this test with the air conditioning off.
- Do not perform the stall test for longer than 5 seconds.
- When performing the stall speed test repeatedly, wait for 15 seconds or more between tests.
- The installation position of SST is different for the D position and R position line pressure tests.
-
Check that there is no obstruction within 5 m (16.4 ft.) of the driving direction (forward of the vehicle when the shift lever in D, and behind the vehicle when the shift lever in R).
When torque is restricted by a safety function of the intelligent clearance sonar system, etc., the stall characteristics may not be normal.
(1) Warm up the ATF.
(2) Turn the ignition switch off.
(3) Lift the vehicle.
(4) Remove the engine under cover.
(5) Remove the test plug A on the front side of the transaxle case and install SST.
SST: 09993-19015
09993-00010
09993-00040
|
*a |
Test Plug A |
(6) Lower the vehicle.
(7) Fully apply the parking brake and chock all 4 wheels.
(8) Start the engine and check the idle speed.
(9) Keep your left foot firmly on the brake pedal and move the shift lever to D.
(10) Measure the line pressure while the engine is idling.
Specified Line Pressure:
|
Condition |
D Position |
|---|---|
|
Engine idling |
500 to 700 kPa (5.1 to 7.1 kgf/cm2, 73 to 102 psi) |
(11) Depress the accelerator pedal as much as possible with your right foot. Quickly read the highest line pressure reading when the engine speed reaches stall speed.
Specified Line Pressure
|
Condition |
D Position |
|---|---|
|
Stall test |
1300 to 1600 kPa (13.3 to 16.3 kgf/cm2, 189 to 232 psi) |
(12) Turn the ignition switch off.
(13) Remove SST and install the test plug A.
(14) Remove the test plug B on the left side of the transaxle case and install SST.
SST: 09993-19015
09993-00010
09993-00040
|
*a |
Test Plug B |
(15) Start the engine and check the idle speed.
(16) Keep your left foot firmly on the brake pedal and move the shift lever to R.
(17) Measure the line pressure while the engine is idling.
Specified Line Pressure:
|
Condition |
R Position |
|---|---|
|
Engine idling |
500 to 750 kPa (5.1 to 7.6 kgf/cm2, 73 to 109 psi) |
(18) Depress the accelerator pedal as much as possible with your right foot. Quickly read the highest line pressure reading when the engine speed reaches stall speed.
Specified Line Pressure
|
Condition |
R Position |
|---|---|
|
Stall test |
1700 to 2100 kPa (17.3 to 21.4 kgf/cm2, 247 to 305 psi) |
(19) Turn the ignition switch off.
(20) Remove SST and install the test plug B.
(21) Clear the DTCs.
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![2017 - 2020 MY Sienna [08/2016 - ]; UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
Evaluation
|
Problem |
Possible Cause |
|---|---|
|
Measured values at all positions are higher than specified |
|
|
Measured values at all positions are lower than specified |
|
|
Pressure is low when shift lever is in D only |
|
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Pressure is low when shift lever is in R only |
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