Manufacturer Code Charts: 1306

Control System DTCs

Navigation System DTC Troubleshooting: 1306

DTC 1306 : Vehicle Speed Pulse

NOTE:
* Check the vehicle battery condition first Component Tests and General Diagnostics.
* This navigation DTC sets when there is a problem with the VSP circuit.
* Check for aftermarket accessories that may interfere with the navigation system.
* Check the GPS reception in an open area.
* Aftermarket metallic window tint or electronic devices located near the audio-navigation unit or GPS antenna can potentially interfere with the operation of the navigation system.
* Before you troubleshoot, make sure to follow the How to Troubleshoot the Navigation System Initial Inspection and Diagnostic Overview.
* Check any official Honda service website for more service information about the navigation system.
* Check the connectors for poor connections or loose terminals.

1. Problem verification:

-1. Clear the hard error codes Initial Inspection and Diagnostic Overview.

-2. Test-drive the vehicle at steady speed more than 12 mph (20 km/h) for about 1 minute.

-3. Check for hard error codes Initial Inspection and Diagnostic Overview.

Is DTC 1306 indicated?
-YES- The failure is duplicated, go to step 2.
-NO- Intermittent failure, the system is OK at this time.

2. Determine possible failure area (audio-navigation unit, others):

-1. Go into the System Diagnostic Mode, and select the Car Status in the System Links to check the vehicle speed pulse.

-2. With the help of an assistant test-drive the vehicle, and watch the VSP signal.

Does the VSP signal change from [0] (stopped) to [1] (driving) as you drive?
-YES- Replace the audio-navigation unit Audio-Navigation Unit Removal and Installation.
-NO- Go to step 3.

3. Determine possible failure area (VSP line, others):

-1. Turn the ignition switch to LOCK (0).

-2. Jump the SCS line with the HDS.

-3. Disconnect the following connector.






-4. Turn the ignition switch to ON (II).

-5. Measure the voltage between test points 1 and 2.










Is there about 5 V?
-YES- The VSP wire is OK. Go to step 5.
-NO- Go to step 4.

4. Open wire check (VSP line):

-1. Measure the voltage between test points 1 and 2.










Is there about 5 V?
-YES- Repair an open in the wire between the audio-navigation unit and the PCM.
-NO- Replace the audio-navigation unit Audio-Navigation Unit Removal and Installation.

5. PCM check:

-1. Turn the ignition switch to LOCK (0).

-2. Reconnect PCM connector A (49P).

-3. Raise the vehicle on a lift.

-4. Turn the ignition switch to ON (II).

-5. Measure the voltage between test points 1 and 2.










Does the voltage pulse between 0 V and 5 V as you rotate the tires?
-YES- Replace the audio-navigation unit Audio-Navigation Unit Removal and Installation.
-NO- Update the PCM PCM Update if it does not have the latest software, or substitute a known-good PCM Service and Repair, and recheck.