Honda 2004 Odyssey Service Manual page 2054

Yaw Rate Sensor Check
1. Perform the start-up procedure (see page 22-376).
2. Select yaw rate.
3. The yaw rate offset and sensor should indicate
1.500 to 3.500 V with the vehicle stopped. If either is
zero or five volts (0.00 V or 5.00 V), replace the
navigation unit.
4. The yaw rate offset and sensor should be within
0.01 V of each other with the vehicle stopped.
The sensor value should change relative to offset
as the car is turned while driving. If not, replace the
navigation unit.
Example
Car stopped:
Normal
Offset 2.526 V
Sensor 2.516 2.536 V Sensor
Car turning:
Normal
Offset 2.526 V
Sensor 2.678 V
( Right Turn )
2.479 V
( Left Turn )
NOTE: The next check will need to be done as the
vehicle is driven. You may want to save this test
until last. Have a helper monitor the screen as the
vehicle is driven.
Abnormal
Offset 2.526 V
2.623 V
Abnormal
Offset 2.526 V
Sensor 2.525 V
( no change
on turns )
5. Select tuning.
6. Test drive the vehicle on a straight section of
highway. While driving the vehicle, monitor the
RED ARROW SHAPED ICON on the ''Tuning''
screen. Just under the icon you will see term
''ANG-Disp'' with an angle degree number written
under it (for example:
The icon will leave a trail of ''BREAD CRUMBS'' as
it moves across the screen from left to right. It takes
approximately 1/2 mile to cover the screen.
As you drive the vehicle, the angle degree number
should be 0° ( 3°). If after 1/2 mile the number
exceeds 0° ( 3°), replace the navigation unit.
NOTE: This test relies on the vehicle being driven
perfectly straight for 1/2 mile. If this not possible,
the results of this test will be false. When possible
compare your results to a known-good vehicle.
4°).
22-375