Manufacturer Code Charts: 1306

Navigation System DTC Troubleshooting: 1306

DTC 1306:

Vehicle Speed Pulse

NOTE:

- Check the vehicle battery condition first Testing and Inspection.
- This navigation DTC sets when there is a problem with the VSP circuit.
- Before you troubleshoot, make sure to follow the General Troubleshooting Information Reading and Clearing Diagnostic Trouble Codes.

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] to [1] as you drive?

YES -

Replace the navigation unit Service and Repair.�

NO -

Go to step 7.

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

8. Jump the SCS line with the HDS.

9. Disconnect ECM/PCM connector A (49P).

10. Disconnect navigation unit connector A (8P).

11. Check for continuity between navigation unit connector A (8P) terminal No. 6 and body ground.





Is there continuity?

YES -

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

NO -

Go to step 12.

12. Check for continuity between navigation unit connector A (8P) terminal No. 6 and ECM/PCM connector A (49P) terminal No. 30.





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 navigation unit and the ECM/PCM.�