Symptom Troubleshooting

Symptom Troubleshooting: Vehicle position icon constantly leaves road, moves erratically, or is displayed very far from actual vehicle position

Vehicle position icon constantly leaves road, moves erratically, or is displayed very far from actual vehicle position

NOTE:

- Check the vehicle battery condition first. Testing and Inspection

- Check that the GPS antenna is plugged in.

- This is not the same condition as when driving off-road (or on a fire or logging road). This condition is caused by a loss of map matching from a bad sensor input. Check for aftermarket metallic window tinting or other objects that can block the GPS signal. Always do the Map matching Reading and Clearing Diagnostic Trouble Codes before proceeding with the troubleshooting.

- Make sure that the correct navigation DVD color and version are installed.

- Inspect the navigation DVD for dirt or damage.

- Check any official Honda service website for more service information about the navigation system.

- Check the GPS signal reception in an open area.

1. Check the GPS icon on the navigation screen.

Is the GPS icon white?
YES - Go to GPS icon is white or not shown. Symptom Troubleshooting

NO - Go to step 2.


2. Go into the Self-Diagnosis Mode, and use the Yaw Rate test Navigation System Diagnostic Mode to check the yaw rate sensor.

3. Go into the Self-Diagnosis Mode, and use the Car Status test Navigation System Diagnostic Mode to check the vehicle speed pulse.

Are the yaw rate sensor and vehicle speed pulse OK?
YES - The condition may be normal. Check to see if the condition occurs in the same place in a known-good vehicle. If it does, the problem could be in the database. Go to step 4.

NO - If the problem is the yaw rate sensor, replace the navigation unit. Service and Repair If the problem is the vehicle speed pulse, check for an open in the VSP wire between the navigation unit and the PCM. If the wire is OK, substitute a known-good navigation unit, Service and Repair and retest. If the problem goes away, replace the original navigation unit. If the problem does not go away, update the PCM ECM/PCM Update if it does not have the latest software or substitute a known-good PCM. Service and Repair


4. Substitute a known-good navigation unit, Service and Repair and check to see if the problem occurs in the same place.

Does the problem occur in the same place?
YES - The problem is in the database. Report the problem according to the Navigation System Manual under Reporting Errors.

NO - Replace the original navigation unit.