Car Status - Honda ACCORD 2008 Manual

INTERACTIVE NETWORK
Yaw Rate Tuning
This diagnostic allows you to graphically display problems with the yaw rate sensor.
The ANG-Disp value accumulates any differences between the offset, and sensor voltages (see Yaw Rate diagnostic). When the sensor is functioning properly, the
random changes in these two voltages generally cancels out, so the value is 0. However if one voltage is consistently higher than the other, then the ANG-Disp value
accumulates the constant change.
The Reset button temporarily clears the angular accumulation (ANG-Disp), and clears the display dots.
Do not touch the CCW, CW, or Set buttons. These are used for factory setup only.
Two tests are explained below. For large problems with the sensor values, the stationary test usually confirms whether the sensor is defective. For yaw rate issues related to
driving, do the road test described below.
1. Stationary test: If the VP icon spins in place and the ANG-Disp value slowly increases or decreases in value, the yaw rate sensor is defective. Replace the
navigation control unit.
2. Road test: Drive the vehicle on a very straight road. Enter the diagnostic mode, select Yaw rate, and touch the Tuning button. While driving down a straight road,
the white dots should trace a straight line across the screen. However, if you are driving on a straight road, and you notice the dots constantly dropping down or
heading up as you drive, the navigation control unit's yaw sensor is defective. You can touch Reset to clear ANG-Disp, and dotted lines.
If either test above fails, please enter Yaw rate sensor defective for the problem description, on the Navigation core return form.
NOTE: The CCW, CW and Set buttons are disabled and cannot be activated.

Car Status

Use this screen to confirm that the navigation unit is properly receiving input signals. Signals equal to (0) are OFF, and signals equal to (1) are ON. If the value on the
display does not match the actual vehicle status, then check the wire carrying the signal.
VSP-Vehicle Speed Pulse from PCM (Pin 6 of A-connector)
a) OFF (0) when vehicle is not moving
b) ON (1) when vehicle is moving
The VSP comes from the PCM as a dedicated signal. Internally, the navigation unit compares the actual VP on the map against street data to adjust the pulse to speed
scaling factor. As this scaling factor becomes more accurate, the Level gradually increases from 0 to 10 (see the Tire Calibrate diagnostic screen).
BACK-Reverse indication from taillight relay (Pin 5 of A-connector)
a) OFF (0) when the shift lever is in any position other than reverse
b) ON (1) when the shift lever is in reverse
The Back signal is used by the navigation unit to allow the map screen to show the VP moving backwards when in reverse. This signal is needed because the Speed Pulse
has no direction indication.
IGNITION-Ignition Switch Position Indication (Pin 1 or 2 of A-connector)
Detects if the engine is running is running using information provided over the F-CAN bus.
American Honda Motor Co., Inc. Page 16 of 20