Lexus NX: Hybrid Transaxle System

On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT FLUID PRESSURE OF OIL PUMP

(a) Remove the rear engine under cover LH.

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(b) Remove the fluid pump cover plug and O-ring from the hybrid vehicle transaxle assembly.

(c) Install SST to the hybrid vehicle transaxle assembly.

SST: 09993-19015

09993-00020

09993-00030

(d) Put the engine in inspection mode.

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(e) Measure the fluid pressure.

Standard:

Engine Speed

Fluid Temperature

Transaxle Fluid Pressure

1000 rpm

20 to 50 °C (68 to 122 °F)

6 kPa (0.06 kgf/cm2, 0.87 psi) or more

NOTICE:

Be sure to cancel the inspection mode immediately after the hybrid transaxle fluid pressure check is completed.

(f) Remove SST from the hybrid vehicle transaxle assembly.

(g) Install a new O-ring and fluid pump cover plug to the hybrid vehicle transaxle assembly.

Torque:

8.0 N·m {82 kgf·cm, 71 in·lbf}

(h) Install the rear engine under cover LH.

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2. ROAD TEST

CAUTION:

Confirm the safety of the working environment, then start the inspection.

NOTICE:

  • Perform engine inspection and adjustment before starting a road test.
  • Perform a road test at normal operating fluid temperature 50 to 80°C (122 to 176°F).
  • Make sure the air conditioning switch and cruise control switch are off.
Load Test Table

Check Item

Check Procedure

S position test

With the shift lever in S (while the vehicle is stopped), move the shift lever to "+" to check that the shift position indicated on the combination meter changes as follows: 1 → 2, 2 → 3, 3 → 4, 4 → 5 and 5 → 6.

Downshifting

While driving with the S3 range selected and a vehicle speed of approximately 92 km/h (57 mph), move the shift lever to "-" and check that the transmission shifts to the S2 range.

HINT:

If the vehicle speed exceeds 94 km/h (58 mph), downshifting cannot be performed.

While driving with the S2 range selected and a vehicle speed of approximately 53 km/h (33 mph), move the shift lever to "-" and check that the transmission shifts to the S1 range.

HINT:

If the vehicle speed exceeds 55 km/h (34 mph), downshifting cannot be performed.

P position test

Stop the vehicle on an incline (more than 5°) and after moving the shift lever to P, release the parking brake and check that the parking lock pawl holds the vehicle in place.

Noise and vibration

Check for noise and vibration when driving the vehicle and during gear changes.

Fluid leaks

After performing a road test, check for fluid leaks.

READ NEXT:

 Hybrid Vehicle Transaxle

 Components

COMPONENTS ILLUSTRATION *1 SERVICE PLUG GRIP *2 BATTERY SERVICE HOLE COVER *3 HYBRID BATTERY SERVICE PLUG COVER - - N*m (kgf*cm, ft.*lbf): Specified torque - - ILLUST

 Removal

REMOVAL CAUTION / NOTICE / HINT CAUTION: The engine assembly with hybrid vehicle transaxle assembly is very heavy. Be sure to follow the procedure described in the repair manual, or the engine lifter

SEE MORE:

 Components

COMPONENTS ILLUSTRATION *A for Driver Side *B for Front Passenger Side *1 FRONT INNER SEAT CUSHION SHIELD LH *2 FRONT LOWER SEAT CUSHION SHIELD *3 FRONT SEAT CUSHION SHIELD LH *4 FRONT SEAT INNER BELT ASSEMBLY LH *5 FRONT SEAT INNER BELT ASSEMBLY RH *6 SEPARAT

 Components

COMPONENTS ILLUSTRATION *1 LOWER OUTER MIRROR COVER LH *2 OUTER MIRROR BEZEL LH *3 OUTER MIRROR COVER LH *4 OUTER MIRROR LH *5 SIDE TURN SIGNAL LIGHT ASSEMBLY LH - -

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