DTC 1306: Vehicle Speed Pulse
- Check the vehicle battery condition first (see 12 VOLT BATTERY TEST ).
- This navigation DTC sets when there is a problem with the VSP circuit.
- Before you troubleshoot, make sure to follow the General Troubleshooting Information (see GENERAL TROUBLESHOOTING INFORMATION ).
- Check the MIL on the gauge control module (see
SELF-DIAGNOSTIC FUNCTION
).
Is the MIL on?
YES -Go to the PGM-FI system's General Troubleshooting Information (see GENERAL TROUBLESHOOTING INFORMATION ).
NO -Go to step 2.
- Clear the hard error code (see HOW TO CLEAR ERROR HISTORY ).
- Turn the ignition switch to LOCK (0), and then start the engine.
- Check for the hard error code (see HOW TO CHECK ERROR HISTORY (NAVIGATION DTCS)
).
Is DTC 1306 indicated?
YES -Go to step 5.
NO -Intermittent failure, the system is OK at this time.
- Go into the System Diagnostic Mode, and use the Car Status test (see CAR STATUS ) to check the VSP signal.
- 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 (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ).
NO -Go to step 7.
- Turn the ignition switch to LOCK (0).
- Remove the audio-navigation unit (see 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.
- Jump the SCS line with the HDS.
- Disconnect audio-navigation unit connector A (24P) and ECM/PCM connector A (44P).
- Check for continuity between audio-navigation unit connector A (24P) terminal No. 23 and body ground.Fig 1: Checking Continuity Between Audio-Navigation Unit Connector A (24P) Terminal No. 23 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
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.
- Check for continuity between audio-navigation unit connector A (24P) terminal No. 23 and ECM/PCM connector A (44P) terminal No. 29.Fig 2: Checking Continuity Between Audio-Navigation Unit Connector A (24P) Terminal No. 23 And ECM/PCM Connector A (44P) Terminal No. 29
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Update the ECM/PCM (see ELD REPLACEMENT ) if it does not have the latest software, or substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ).
NO -Repair an open in the wire between the audio-navigation unit and the ECM/PCM.