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Manufacturer Code Charts: 1306




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.
- Before you troubleshoot, make sure to follow the General Troubleshooting Information How To Troubleshoot The Navigation System.

1. Check the MIL on the gauge control module Initial Inspection and Diagnostic Overview.

Is the MIL on?

YES -

Go to the PGM-FI system's General Troubleshooting Information Initial Inspection and Diagnostic Overview.�

NO -

Go to step 2.

2. Clear the hard error code.

3. Turn the ignition switch to LOCK (0), and then start the engine.

4. Check for the hard error code.

Is DTC 1306 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time.�

5. Go into the System Diagnostic Mode, and use the Car Status test to check the VSP signal.

6. Drive the vehicle, and watch the VSP signal.

Does the VSP signal change from [0] when stopped to [1] when the vehicle is moving?

YES -

Replace the audio-navigation unit Audio-Navigation Unit Removal/Installation.�

NO -

Go to step 7.

7. Turn the ignition switch to LOCK (0).

8. Remove the audio-navigation unit Audio-Navigation Unit Removal/Installation.

NOTE:

- Eject all the discs before removing the audio-navigation unit to prevent damaging the CD player's load mechanism.
- Remove the PC card before removing the audio-navigation unit.

9. Jump the SCS line with the HDS.

10. Disconnect audio-navigation unit connector A (24P) and ECM/PCM connector A (44P).

11. Check for continuity between audio-navigation unit connector A (24P) terminal No. 23 and body ground.





Is there continuity?

YES -

Repair a short to body ground in the wire between the audio-navigation unit and the ECM/PCM.�

NO -

Go to step 12.

12. Check for continuity between audio-navigation unit connector A (24P) terminal No. 23 and ECM/PCM connector A (44P) terminal No. 29.





Is there continuity?

YES -

Update the ECM/PCM ECM/PCM Update if it does not have the latest software, or substitute a known-good ECM/PCM.�

NO -

Repair an open in the wire between the audio-navigation unit and the ECM/PCM.�