1. Yaw Rate Sensor Check Perform the start-up procedure. Press yaw rate. 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. The yaw rate offset and sensor should within ±0.01 V of each other with the car 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 | Abnormal
   Offset | 2.526 V | Offset | 2.526 V
   Sensor | 2.516−2.536 V | Sensor | 2.623 V
   Car turning: |
   Normal | Abnormal
   Offset | 2.526 V | Offset | 2.526 V
   Sensor | 2.678 V (Right Turn) 2.478 V (Left Turn) | Sensor | 2.525 V (no change on turns)
NOTE: The next check will need to be done as the car driven, you may want to save this test until last. Have a helper monitor the screen as the car is driven. Press tuning. Test drive the vehicle straight section of highway. While driving the car, 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: −4 °) The icon will leave a trail of ‘‘BREAD CRUMBS'' as it moves across the screen from left to right. It takes about 1/2 mile to cover the screen. As you drive the car 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 car being driven perfectly straight for 1/2 mile. If this is not possible, the results of this test will be false. When possible compare your results to a known-good car. |