1. Measurement of the automatic transmission operating pressure
1. Confirm the following condition before the function check.
Perform function inspection after engine inspection and adjustment.
1) ATF temperature is in hot condition.
Standard: 50 to 60 ℃ { 122 to 140 °F }
2) Switch of A/C and light etc are off.
Warning
- Before performing the function inspection, make sure to secure the vehicle to stop it from jumping out.
2. Hydraulic test
1) Chock 4 wheels and apply parking brake fully, lock vehicle perfectly.
2) Install the oil pressure gauge to the test hole for line pressure.
Legend
- Test hole for line pressure
3) While depressing the brake pedal, move the select lever to D range and R range, and measure the line pressure at each engine speed.
Caution
- Because of associated sudden increases in ATF oil temperature, do not let the tests continue for 5 seconds or more at the engine speed of 2000 rpm.
- Perform 3 times or more and take the average.
| Engine speed |
Line pressure |
|
| D range |
R range |
|
| 700 rpm (4JJ3 equipped models) |
361 to 457 kPa { 3.7 to 4.7 kgf/cm2 / 52 to 66 psi } |
361 to 457 kPa { 3.7 to 4.7 kgf/cm2 / 52 to 66 psi } |
| 750 rpm (RZ4E-TC equipped models) |
||
| 2,000 rpm |
1,575 to 1,746 kPa { 16.1 to 17.8 kgf/cm2 / 228 to 253 psi } |
1,575 to 1,746 kPa { 16.1 to 17.8 kgf/cm2 / 228 to 253 psi } |
| 60 ℃ { 140 °F } Oil temperature |
||
| Test result |
Cause of failure |
| D range and R range are both lower than the standard value. |
Line pressure control solenoid (SLT) malfunction |
| Primary regulator valve malfunction |
|
| Oil pump malfunction |
|
| Leakage from the D range or R range oil pressure circuits |
|
| D range and R range are both higher than the standard value. |
Line pressure control solenoid (SLT) malfunction |
| Primary regulator valve malfunction |
|
| Only D range is lower than the standard value. |
D range oil pressure circuit malfunction |
| C1 clutch malfunction |
|
| Only R range is lower than the standard value. |
R range oil pressure circuit malfunction |
| B1 and B4 brake malfunction |
|
| Only D range is higher than the standard value. |
Line pressure control solenoid (SLT) malfunction |
| Only R range is higher than the standard value. |
Line pressure control solenoid (SLT) malfunction |
| Sequence valve malfunction |