Test Procedure

NOTE: Before doing the pressure test, check the following conditions.

Check that the real time AWD system indicator does not come on. If it does, check for real time AWD system DTC's .
Check the rear differential fluid level - Refer to: Rear Differential Fluid Inspection and Replacement (4WD) Rear Differential Fluid Inspection and Replacement (AWD) .
Check for rear differential fluid leaks at the rear differential assembly.

1. HDS - Connect
2. Vehicle - Lift
3. Rear Differential Fluid Pressure - Test

Courtesy of HONDA, U.S.A., INC.

1. Select DATA LIST in the REAL TIME AWD SYSTEM with the HDS

2. Select OIL TEMPERATURE FOR REAR DIFFERENTIAL in the DATA LIST with the HDS.
- If the temperature is above 68 °F (20 °C), go to step 3.
- If the temperature is below 68 °F (20 °C), drive the vehicle to warm up the rear differential until the fluid temperature reaches at least 68 °F (20 °C), then go to step 3.
3. Start the engine

4. Select FUNCTIONAL TEST in the REAL TIME AWD SYSTEM with the HDS

5. Select OIL PRESSURE CONTROL TEST in the FUNCTIONAL TEST with the HDS

6. Check the results displayed on the HDS.
- If Normal is displayed, the test is completed.
- If 1-1 is displayed, go to steps 7 through 21.
- If 2-1 and 5-1 is displayed: go to steps 22 through 36.
- If 3-1 is displayed: go to steps 37 through 50.
- If 4-1 and 6-1 is displayed: go to steps 51 through 58.
7. Turn the vehicle to the OFF (LOCK) mode

8. Disconnect the connector (A)

9. Remove the rear differential fluid pressure sensor (B)

10. Reconnect the connector to the rear differential fluid pressure sensor

11. Turn the vehicle to the ON mode

12. Select the DATA LIST in the REAL TIME AWD SYSTEM with the HDS.

13.Check the ACTUAL OIL PRESSURE OF THE OIL PRESSURE SENSOR FOR REAR DIFFERENTIAL in the DATA LIST with the HDS.
- If the fluid pressure is higher than 0-50 kPa (0.0-0.5 kgf/cm2, 0-7 psi), replace the rear differential fluid pressure sensor.
- If the fluid pressure is within the range of 0-50 kPa (0.0-0.5 kgf/cm2, 0-7 psi), go to step 14.
14.Replace the rear differential fluid - Refer to: Rear Differential Fluid Inspection and Replacement (4WD) Rear Differential Fluid Inspection and Replacement (AWD) .

15.Install the rear differential fluid pressure sensor .

16.Do the real time AWD system bleeding with the HDS .

17.Start the engine.

18.Select FUNCTIONAL TEST in the REAL TIME AWD SYSTEM with the HDS.

19.Select OIL PRESSURE CONTROL TEST in the FUNCTIONAL TEST with the HDS.

20.Check the results displayed on the HDS.
- If Normal is displayed, the test is completed.
- If 1-1 is displayed: go to step 21.
21.Do the rear differential fluid pressure sensor test with the HDS . If the rear differential fluid pressure sensor test is OK, replace the rear differential assembly - Refer to: Rear Differential Removal and Installation (4WD)Rear Differential Removal and Installation (AWD) .

22.Turn the vehicle to the OFF (LOCK) mode.

23.Turn the vehicle to the ON mode.

24.Do the real time AWD system bleeding with the HDS .

25.Start the engine.

26.Select FUNCTIONAL TEST in the REAL TIME AWD SYSTEM with the HDS.

27.Select OIL PRESSURE CONTROL TEST in the FUNCTIONAL TEST with the HDS.

28.Check the results displayed on the HDS.
- If Normal is displayed, intermittent failure, the system is OK at this time, the test is completed.
- If 2-1 and 5-1 is displayed: go to step 29.
29.Replace the rear differential fluid - Refer to: Rear Differential Fluid Inspection and Replacement (4WD) Rear Differential Fluid Inspection and Replacement (AWD) .

30.Do the real time AWD system bleeding with the HDS .

31.Start the engine.

32.Select FUNCTIONAL TEST in the REAL TIME AWD SYSTEM with the HDS.

33.Select OIL PRESSURE CONTROL TEST in the FUNCTIONAL TEST with the HDS.

34.Check the results displayed on the HDS.
- If Normal is displayed, the test is completed.
- If 2-1 and 5-1 is displayed: go to step 35.
35.Replace the rear differential fluid - Refer to: Rear Differential Fluid Inspection and Replacement (4WD) Rear Differential Fluid Inspection and Replacement (AWD) .

36.Do the rear differential fluid pressure sensor test and the rear differential solenoid valve test with the HDS. If the rear differential fluid pressure sensor test and the rear differential solenoid valve test is OK, replace the rear differential assembly - Refer to: Rear Differential Removal and Installation (4WD)Rear Differential Removal and Installation (AWD) .

37.Turn the vehicle to the OFF (LOCK) mode.

38.Turn the vehicle to the ON mode.

39.Do the real time AWD system bleeding with the HDS .

40.Start the engine.

41.Select FUNCTIONAL TEST in the REAL TIME AWD SYSTEM with the HDS.

42.Select OIL PRESSURE CONTROL TEST in the FUNCTIONAL TEST with the HDS.

43.Check the results displayed on the HDS.
- If Normal is displayed, intermittent failure, the system is OK at this time, the test is completed.
- If 3-1 is displayed: go to step 44.
44.Replace the rear differential fluid - Refer to: Rear Differential Fluid Inspection and Replacement (4WD) Rear Differential Fluid Inspection and Replacement (AWD) .

45.Do the real time AWD system bleeding with the HDS .

46.Start the engine.

47.Select FUNCTIONAL TEST in the REAL TIME AWD SYSTEM with the HDS.

48.Select OIL PRESSURE CONTROL TEST in the FUNCTIONAL TEST with the HDS.

49.Check the results displayed on the HDS.
- If Normal is displayed, the test is completed.
- If 3-1 is displayed: go to step 50.
50.Do the rear differential solenoid valve test with the HDS . If the rear differential solenoid valve test is OK, replace the rear differential assembly - Refer to: Rear Differential Removal and Installation (4WD)Rear Differential Removal and Installation (AWD) .

51.Turn the vehicle to the OFF (LOCK) mode.

52.Replace the rear differential fluid - Refer to: Rear Differential Fluid Inspection and Replacement (4WD) Rear Differential Fluid Inspection and Replacement (AWD) .

53.Do the real time AWD system bleeding with the HDS .

54.Start the engine.

55.Select FUNCTIONAL TEST in the REAL TIME AWD SYSTEM with the HDS.

56.Select OIL PRESSURE CONTROL TEST in the FUNCTIONAL TEST with the HDS.

57.Check the results displayed on the HDS.
- If Normal is displayed, the test is completed.
- If 4-1 and 6-1 is displayed: go to step 58.
58.Do the rear differential solenoid valve test with the HDS . If the rear differential solenoid valve test is OK, replace the rear differential assembly - Refer to: Rear Differential Removal and Installation (4WD)Rear Differential Removal and Installation (AWD) .