Audio System DTC Troubleshooting: 1306
DTC 1306: Vehicle Speed Pulse
NOTE:
Check the vehicle 12 volt battery condition first.
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 (vehicle position should be detected in three dimensions).
Aftermarket metallic window tint or electronic devices located near the audio unit or GPS antenna can potentially interfere with the operation of the audio system.
Before you troubleshoot, make sure to follow the General Troubleshooting Information.
Check the connectors for poor connections or loose terminals.
1.
Problem verification:

Problem verification
?1.
Clear the hard error codes.

?2.
Wait for at least 6 seconds.

?3.
Turn the vehicle to the ON mode.

?4.
Test-drive the vehicle at steady speed more than 12 mph (20 km/h) for about 1 minute.

?5.
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 unit, others):

Determine possible failure area (audio unit, others)
?1.
Go into the System Diagnostic Mode, and select the Vehicle status in the Unit Check.

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

Does the VSP change from [0] (stopped) to [1] (driving) as you drive?

     
YES
     
     
     
     
NO
     
     
     
Go to step 3.
3.
Determine possible failure area (VSP line, others):

Determine possible failure area (VSP line, others)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Jump the SCS line with the HDS.

?3.
Disconnect the following connector.
PCM connector A (50P) (1.5 L engine)
PCM connector A (51P) (2.4 L engine)

?4.
Turn the vehicle to the ON mode.

?5.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
 
PCM connector A (50P) (1.5 L engine): disconnected
PCM connector A (51P) (2.4 L engine): disconnected
Test point 1
PCM connector A (50P) (1.5 L engine) No. 35
 
PCM connector A (51P) (2.4 L engine) No. 25
Test point 2
Body ground

Is there about 5.0 V?

     
YES
     
     
     
The VSP wire is OK. Go to step 4.
     
NO
     
     
     
Go to step 5.
4.
Determine possible failure area (audio unit, PCM):

Determine possible failure area (audio unit, PCM)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Reconnect PCM connector A (50P) (1.5 L engine).

?3.
Reconnect PCM connector A (51P) (2.4 L engine).

?4.
Raise the vehicle on a lift.

?5.
Turn the vehicle to the ON mode.

?6.
Block the front tire of one side, and rotate the front tire slowly that is not blocked.

?7.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode, with the front tire slowly rotating
Test point 1
Audio unit connector A (24P) No. 22
Test point 2
Body ground

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

     
YES
     
     
     
     
NO
     
     
     
5.
Open wire check (VSP line):

Open wire check (VSP line)
?1.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
 
PCM connector A (50P) (1.5 L engine): disconnected
PCM connector A (51P) (2.4 L engine): disconnected
Test point 1
Audio unit connector A (24P) No. 22
Test point 2
Body ground

Is there about 5.0 V?

     
YES
     
     
     
Repair an open in the wire.?
     
NO
     
     
     
The VSP wire is not open. Go to step 6.
6.
Shorted wire check (VSP line):

Shorted wire check (VSP line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
Audio unit connector A (24P)

?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
PCM connector A (50P) (1.5 L engine): disconnected
PCM connector A (51P) (2.4 L engine): disconnected
 
Audio unit connector A (24P): disconnected
Test point 1
Audio unit connector A (24P) No. 22
Test point 2
Body ground

Is there continuity?

     
YES
     
     
     
Repair a short to body ground in the wire.?
     
NO