Audio-Navigation System DTC: 1306 (Navigation System) (2024 2025)

Refer to: NAVIGATION SYSTEM DESCRIPTION - SYSTEM DIAGRAMDTC 1306  : Vehicle Speed Pulse

NOTE: 

• If the audio-navigation unit cannot detect the vehicle speed pulse despite of detecting the vehicle moving by receive the GNSS signal, the audio-navigation unit determines an abnormality and stores the DTC.
• Check the vehicle 12 volt battery condition first - Refer to: Check the vehicle 12 volt battery condition first .
• Before you troubleshoot, make sure to follow the General Troubleshooting Information - Refer to: HOW TO TROUBLESHOOT THE NAVIGATION SYSTEM .
• Check the GNSS reception in an open area (vehicle position should be detected in three dimensions).
• Check the connectors for poor connections or loose terminals.

1. Problem verification

   -1. Clear the hard error codes - Refer to: HOW TO TROUBLESHOOT THE NAVIGATION SYSTEM .

   -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 - Refer to: HOW TO TROUBLESHOOT THE NAVIGATION SYSTEM .

   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 Vehicle Status in the Unit Check - Refer to: NAVIGATION SYSTEM DIAGNOSTIC MODE .

   -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 

   Replace the audio-navigation unit - Refer to: AUDIO-NAVIGATION UNIT REMOVAL AND INSTALLATION (2024 2025) .

   NO 

   Go to step 3.

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

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Jump the SCS line with the HDS, and wait more than 1 minute.

   -3. Disconnect the following connector.

   PCM connector A (50P)

   -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): disconnected

   Test point 1

   PCM connector A (50P) No. 26 - Refer to: PCM CONNECTOR FOR INPUTS AND OUTPUTS

   Test point 2

   Body ground

   Is there about 5.0 V?

   YES 

   The wire is OK. Go to step 4.

   NO 

   Go to step 5.

4. PCM check

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Reconnect PCM connector A (50P).

   -3. Raise the vehicle on a lift.

   -4. Turn the vehicle to the ON mode.

   -5. Block the front tire of one side, and rotate the front tire slowly that is not blocked.

   -6. Measure the voltage between test points 1 and 2.

   Test condition

   Vehicle ON mode, with the front tire slowly rotating

   Test point 1

   Audio-navigation unit connector A (24P) No. 22 - Refer to: AUDIO-NAVIGATION UNIT CONNECTOR FOR INPUTS AND OUTPUTS (2024 2025)

   Test point 2

   Body ground

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

   YES 

   Replace the audio-navigation unit - Refer to: AUDIO-NAVIGATION UNIT REMOVAL AND INSTALLATION (2024 2025) .

   NO 

   Substitute a known-good PCM - Refer to: PCM REMOVAL AND INSTALLATION , and recheck.

5. Open wire check (VSP OUT line)

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

   Test condition

   Vehicle ON mode

   PCM connector A (50P): disconnected

   Test point 1

   Audio-navigation unit connector A (24P) No. 22 - Refer to: AUDIO-NAVIGATION UNIT CONNECTOR FOR INPUTS AND OUTPUTS (2024 2025)

   Test point 2

   Body ground

   Is there about 5.0 V?

   YES 

   Repair an open in the wire.

   NO 

   The wire is not open. Go to step 6.

6. Shorted wire check (VSP OUT line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connector.

   Audio-navigation unit connector A (24P)

   -3. Measure the resistance between test points 1 and 2.

   Test condition

   Vehicle OFF (LOCK) mode

   PCM connector A (50P): disconnected

   Audio-navigation unit connector A (24P): disconnected

   Test point 1

   Audio-navigation unit connector A (24P) No. 22 - Refer to: AUDIO-NAVIGATION UNIT CONNECTOR FOR INPUTS AND OUTPUTS (2024 2025)

   Test point 2

   Body ground

   Is there 1 MOhm or more?

   YES 

   Replace the audio-navigation unit - Refer to: AUDIO-NAVIGATION UNIT REMOVAL AND INSTALLATION (2024 2025) .

   NO 

   Repair a short to body ground in the wire.