Inspections Before Trouble Diagnosis

TROUBLE DIAGNOSIS


Inspections Before Trouble Diagnosis


A/T FLUID CHECK (VK45DE MODELS ONLY)

A/T Fluid Leakage and A/T Fluid Level Check
Inspect for A/T fluid leakage and check the A/T fluid level. Checking A/T Fluid.

A/T Fluid Condition Check
Inspect the A/T fluid condition.
















STALL TEST

Stall Test Procedure
1. Inspect the amount of engine oil. Replenish the engine oil if necessary.





2. Drive for about 10 minutes to warm up the vehicle so that the A/T fluid temperature is 50 to 80�C (122 to 176�F). Inspect the amount of ATF. Replenish if necessary.





3. Securely engage the parking brake so that the tires do not turn.





4. Engine start, apply foot brake, and place selector lever in "D" position.





5. While holding down the foot brake, gradually press down the accelerator pedal.
6. Quickly read off the stall speed, then quickly remove your foot from the accelerator pedal.

CAUTION:
Never hold down the accelerator pedal for more than 5 seconds during this test.

Stall speed
VQ35HR models: 2,700 - 3,000 rpm
VK45DE models: 2,260 - 2,560 rpm





7. Move the selector lever to the "N" position.
8. Cool down the ATF.

CAUTION:
Run the engine at idle for at least 1 minute.
9. Repeat steps 5 through 8 with selector lever in "R" position.

Judgment of Stall Test











LINE PRESSURE TEST

Line Pressure Test Port






Line Pressure Test Procedure
1. Inspect the amount of engine oil and replenish if necessary.
2. Drive the car for about 10 minutes to warm it up so that the ATF reaches in range of 50 to 80�C (122 �F), then inspect the amount of ATF and replenish if necessary.

NOTE:
The A/T fluid temperature rises in range of 50 to 80�C (122 to 176�F) during 10 minutes of driving.
3. Remove the front propeller shaft from vehicle (with AWD models). Removal and Installation.





4. After warming up remove the oil pressure detection plug and install the oil pressure gauge [ST2505S001(J-34301-C)].

CAUTION:
When using the oil pressure gauge, be sure to use the Oring attached to the oil pressure detection plug.





5. Securely engage the parking brake so that the tires do not turn.





6. Start the engine, then measure the line pressure at both idle and the stall speed.

CAUTION:
- Keep the brake pedal pressed all the way down during measurement.
- When measuring the line pressure at the stall speed, refer to "STALL TEST".
7. After the measurements are complete, install the oil pressure detection plug and tighten to the specified torque.

Torque: 7.3 Nm (0.74 kg-m, 65 in-lb)

CAUTION:
- Never reuse O-ring.
- Apply ATF to O-ring.

Line Pressure






Judgment of Line Pressure Test