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Rear Differential Pressure Test (AWD): Test

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

Check that the AWD system indicator does not come on. If it does, check for AWD with intelligent control system DTCs .
Check the rear differential fluid level .
Check for rear differential fluid leaks at the rear differential assembly.

HDS - Connect

Rear Differential Fluid Pressure - Test

GHH433345

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

1. Select DATA LIST in the AWD WITH INTELLIGENT CONTROL with the HDS.

2. Select OIL TEMPERATURE FOR REAR DIFFERENTIAL in the DATA LIST with the HDS.

If the temperature is above 68 deg.F (20 deg.C), go to step 3.
If the temperature is below 68 deg.F (20 deg.C), drive the vehicle to warm up the rear differential until fluid temperature reaches at least 68 deg.F (20 deg.C), then go to step 3.

3. Start the engine.

4. Select FUNCTIONAL TEST in the AWD WITH INTELLIGENT CONTROL 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 are displayed: go to steps 22 through 36.
If 3-1 is displayed: go to steps 37 through 50.
If 4-1 and 6-1 are 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 (A) to the rear differential fluid pressure sensor (B).

11. Turn the vehicle to the ON mode.

12. Select the DATA LIST in the AWD WITH INTELLIGENT CONTROL 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 not within -50-50 kPa (-0.51-0.51 kgf/cm 2, -7.3-7.3 psi), replace the rear differential fluid pressure sensor .
If the fluid pressure is within the range of -50-50 kPa (-0.51-0.51 kgf/cm 2, -7.3-7.3 psi), go to step 14.

14. Replace the rear differential fluid .

15. Install the rear differential fluid pressure sensor .

16. Do the AWD system bleeding with the HDS

17. Start the engine.

18. Select FUNCTIONAL TEST in the AWD WITH INTELLIGENT CONTROL 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

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

23. Turn the vehicle to the ON mode.

24. Do the AWD system bleeding with the HDS

25. Start the engine.

26. Select FUNCTIONAL TEST in the AWD WITH INTELLIGENT CONTROL 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 are displayed: go to step 29.

29. Replace the rear differential fluid .

30. Do the AWD system bleeding with the HDS

31. Start the engine.

32. Select FUNCTIONAL TEST in the AWD WITH INTELLIGENT CONTROL 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 are displayed: go to step 35.

35. Replace the rear differential fluid .

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

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

38. Turn the vehicle to the ON mode.

39. Do the AWD system bleeding with the HDS

40. Start the engine.

41. Select FUNCTIONAL TEST in the AWD WITH INTELLIGENT CONTROL 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

.45. Do the AWD system bleeding with the HDS

46. Start the engine.

47. Select FUNCTIONAL TEST in the AWD WITH INTELLIGENT CONTROL 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

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

52. Replace the rear differential fluid

.53. Do the AWD system bleeding with the HDS

54. Start the engine.

55. Select FUNCTIONAL TEST in the AWD WITH INTELLIGENT CONTROL 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 are 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 .