Audio-Navigation System DTC Troubleshooting: 1306
DTC 1306: Vehicle Speed Pulse
NOTE:
Check the vehicle battery condition first.
This navigation DTC sets when there is a problem with the VSP circuit.
Check the GPS reception in an open area.
Aftermarket metallic window tint or electronic devices located near the audio-navigation unit or the GPS antenna can potentially interfere with the operation of the navigation system.
Before you troubleshoot, make sure to follow the General Troubleshooting Information.
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:

Problem verification
?1.
Clear the hard error codes.

?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.

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):

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
     
     
     
Go to step 3.
     
NO
     
     
     
Go to step 4.
3.
PCM check:

PCM check
?1.
Substitute a known-good PCM.

?2.
Clear the hard error codes.

?3.
Press the engine start/stop button to select the OFF mode and then select the ON mode.

?4.
Check for hard error codes.

Is DTC 1501 indicated?

     
YES
     
     
     
     
NO
     
     
     
Replace the original PCM.?
4.
Determine possible failure area (PCM, others):

Determine possible failure area (PCM, others)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connector.

?3.
Press the engine start/stop button to select the ON mode.

?4.
Measure the voltage between test points 1 and 2.
Test condition
ON mode
 
PCM connector A (51P): disconnected
Test circuit
VSP

J35Y1,Y2 engine
Test point 1
PCM connector A (51P) No. 49 (RED)
Test point 2
Body ground

K24W1 engine
Test point 1
PCM connector A (51P) No. 25 (RED)
Test point 2
Body ground
J35Y1,Y2 engine

K24W1 engine


Is there about 5.0 V?

     
YES
     
     
     
The VSP wire is OK. Go to step 5.
     
NO
     
     
     
Go to step 6.
5.
PCM check:

PCM check
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Reconnect PCM connector A (51P) No. 49 or No. 25.

?3.
Raise the vehicle on a lift.

?4.
Press the engine start/stop button to select the ON mode.

?5.
Block or hold one tire so that it cannot rotate, and slowly rotate the other front tire.

?6.
Measure the voltage between test points 1 and 2.
Test condition
ON mode, with the front tire slowly rotating
Test circuit
VSP
Test point 1
Audio-navigation unit connector F (18P) No. 10 (RED)
Test point 2
Body ground


Does the voltage pulse between 0 V and 5 V as you rotate the tire?

     
YES
     
     
     
     
NO
     
     
     
6.
Open wire check (VSP line):

Open wire check (VSP line)
?1.
Measure the voltage between test points 1 and 2.
Test condition
ON mode
 
PCM connector A (51P): disconnected
Test circuit
VSP
Test point 1
Audio-navigation unit connector F (18P) No. 10 (RED)
Test point 2
Body ground


Is there about 5.0 V?

     
YES
     
     
     
Repair an open in the wire between the audio-navigation unit and the PCM.?
     
NO
     
     
     
The VSP wire is not open. Go to step 7.
7.
Shorted wire check (VSP line):

Shorted wire check (VSP line)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connector.
Audio-navigation unit connector F (18P)

NOTE: Eject the disc before disconnecting the audio-navigation unit to prevent damaging the CD/DVD player's load mechanism.

?3.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
 
PCM connector A (51P): disconnected
 
Audio-navigation unit connector F (18P): disconnected
Test circuit
VSP
Test point 1
Audio-navigation unit connector F (18P) No. 10 (RED)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
There is a short to body ground in the wire between the audio-navigation unit and the PCM.?
     
NO