DTC 41-1

DTC 41-1, 41-2: CAN Communication (PCM/VSA System)
1. Clear the DTC.
2. Test-drive the vehicle, and watch the VTM-4 indicator.
Does the VTM-4 indicator come on?
YES - Go to step 3.
NO - The system is OK at this time.

3. Connect the HDS to the 16P Data Link Connector (DLC), and check for a PCM/VSA system DTC.
Is there a DTC?
YES - Troubleshoot the PCM/VSA system for the cause of the DTC.
NO - Go to step 4.

4. Disconnect connector A (22P) from the VTM-4 control unit connector B (56P) from the PCM and the 46P connector from the VSA modulator control unit.





5. Check for continuity between the A11 terminal of the VTM-4 control unit connector A (22P) the 44 terminal of the PCM and the 37 terminal of the VSA control unit.
Is there continuity?
YES - Go to step 6.
NO - Repair open in the wire between the A11 terminal of the VTM-4 control unit and B16 terminal of the PCM, the 14 terminal of the VSA control unit.





6. Check for continuity between the A22 terminal of the VTM-4 control unit connector A (22P) the A9 terminal of the PCM and the 12 terminal of the VSA control unit.
Is there continuity?
YES - Check for loose terminal fit in the VTM-4 control unit, PCM, VSA connectors. If it is normal, replace the VTM-4 control unit.
NO - Repair open in the wire between the A22 terminal of the VTM-4 control unit and A9 terminal of the PCM, the 12 terminal of the VSA control unit.