- A) Warm up the automatic 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: carry out the check with two people: one person must observe the wheels or wheel stoppers, and the second person must carry out the check.
2. Measure the pressure.
A) Start driving by depressing the accelerator pedal half way or more. Check the pressure change in the line.
- Pressure - 294 kPa
V) Release the accelerator pedal. Measure the line pressure.
- Pressure - 98 kPa or less
Attention:
- Before starting the test, make sure that there are no obstructions on the road.
- Make sure there is no wheel slip during the test.
- Carry out the check at an automatic transmission fluid temperature of 50-80°C.
3. Measure the line pressure when the solenoid valve is open (voltage applied).
A) To measure, perform additional operations:
- prepare an additional connector;
- connect wires, 2-3 m long to the terminals "1" And "3" connector;
- connect a 24W lamp as shown in the figure.
b) Connect the wire from the positive battery terminal to the "1", and the wire from the negative terminal to the output "3".
V) Measure the pressure at idle speed with the accelerator pedal fully depressed.
4. Analysis of test results:
A) If the pressure for all conditions is higher than indicated in the table "Pressure in the line of the coupling of blocking of interaxal differential", That:
- Faulty center differential lock valve.
b) If the measured values for all states are less than the specified ones, then:
- faulty pump,
- Faulty center differential lock valve.
V) If the measured values are lower or higher than those indicated, with the adapter connected, then:
- Faulty center differential lock valve.
Table. Pressure in the line of the coupling of blocking of interaxal differential