Main line pressure check
1. Preparation:
- A) Warm up the transmission fluid to operating temperature (50-80°C)
- b) Unscrew the service plug of the gearbox housing and connect a pressure gauge in its place.
Attention: the pressure test should always be carried out by two people - one person should observe the wheels, and the second should carry out the test.
2. Measure the pressure in the main line.
- A) Block the wheels of the car with blocks and apply the parking brake
- b) Start the engine and check the idle speed
- V) Press the brake pedal and move the selector to the position "D" Measure pressure at idle speed
- G) Press the accelerator pedal all the way. Measure the pressure in the main line, at the pressure of the rotational speed of the maximum sign
Attention: release the accelerator pedal and stop the test if the rear wheels begin to rotate before the speed reaches the maximum value.
- d) Repeat the check with the selector position "R"
- e) If the pressure is not equal to the specified - check the adjustment of the control cable and repeat the test
3. Analysis of test results:
- A) If in all ranges the pressure is higher than the specified values, then:
- throttle valve control cable not adjusted,
- throttle valve defective
- faulty pressure regulator
- b) If in all ranges the pressure is below the specified values, then:
- throttle valve control cable not adjusted,
- throttle valve defective
- faulty pressure regulator
- faulty gearbox pump,
- (except A132L) the clutch of the lowering planetary gear set is faulty.
- V) If the pressure is below the specified values in the range "D", That:
- leakage of working fluid in the control loop on the range "D",
- Faulty forward clutch
- (except A132L) the clutch of the lowering planetary gear set is faulty.
- G) If the pressure is below the specified values in the range "R", That:
- oil leakage in the control circuit on the range "R",
- defective reverse clutch
- the brake of the first gear and reverse gear is faulty,
- (except A132L) the clutch of the lowering planetary gear set is faulty.
Checking Speed Regulator Pressure (A241L and A132L)
1. Warm up the automatic transmission to operating temperature (50 - 80°C).
2. Jack up the car.
3. Unscrew the plug of the channel of the high-speed regulator and install a pressure gauge in its place.
Note:
- Check throttle cable adjustment.
- Check tire pressure.
4. Do not apply the parking brake.
5. Start the engine.
6. Set the selector to position "D" and measure the speed regulator pressure as indicated in the table.
If the pressure does not match the specified values, then either fluid is leaking in the speed regulator circuit or the speed regulator is faulty.