Chevy Volt / Opel Ampera SHVCS DTC Clearing

Program.cs

/* This is an experimental script which I used to successfully clear the "Service High Voltage Charging System" message which can occur due to a loss of isolation.
 * Previously I had to pay frequently to access the expensive SPS programming system to clear this code whilst attempting to resolve the underlying cause.
 * This script was generated by a tool I developed to analyse J2534 log files.
 * This could work for other cars but I can't comment on success. Please do not run this unless you understand the consequences!
 * I intend to convert to a version that will work with ELM327 once I learn how these work.
 * The program requires the J2534-Sharp library as a dependency.
 * https://github.com/BrianHumlicek/J2534-Sharp
 */
using System;
using System.Linq;
using System.Text;
using System.Threading;
using SAE.J2534;

namespace J5234Examples
{
    class Program
    {
        static void Main(string[] args)
        {
            Device device1;
            Channel channel1;
            int filter1;
            int filter2;

            // Change this line is using something different to the VXDIAG VCX Nano!
            string DllFileName = APIFactory.GetAPIinfo().First(api => api.Name.Contains("VXDIAG")).Filename;
            API API = APIFactory.GetAPI(DllFileName);

            Console.WriteLine("PTOpen");
            device1 = API.GetDevice();
            Console.WriteLine("PTReadVersion");
            Console.WriteLine(device1.FirmwareVersion);
            
            Console.WriteLine("PTConnect");
            // 6 = ISO15765
            channel1 = device1.GetChannel((Protocol)6, (Baud)500000, 0);
            Console.WriteLine("PTIoctl");
            // 32768 = CAN_MIXED_FORMAT
            channel1.SetConfig(new[] { new SConfig((Parameter)32768, 1) });

            Console.WriteLine("PTStartMsgFilter");
            filter1 = channel1.StartMsgFilter(new MessageFilter() { FilterType = (Filter)3, Mask = new byte[] { 0xff, 0xff, 0xff, 0xff }, Pattern = new byte[] { 0x00, 0x00, 0x07, 0xec }, FlowControl = new byte[] { 0x00, 0x00, 0x07, 0xe4 } });
            Console.WriteLine("PTStartMsgFilter");
            filter2 = channel1.StartMsgFilter(new MessageFilter() { FilterType = (Filter)1, Mask = new byte[] { 0xff, 0xff, 0xff, 0xff }, Pattern = new byte[] { 0x00, 0x00, 0x05, 0xec }, FlowControl = null });
            
            Console.WriteLine("Pause");
            Console.WriteLine("Sleep(2000)\n");
            Thread.Sleep(2000);
            Console.WriteLine("PTWriteMsgs");
            Console.WriteLine(">>> 00 00 07 e4 27 01");
            // 64 = ISO15765_FRAME_PAD
            channel1.SendMessages(new[] { new Message(new byte[] { 0x00, 0x00, 0x07, 0xe4, 0x27, 0x01 }, (TxFlag)64) });
            Console.WriteLine("ReadBlock");
            ReadUntilMessage(channel1, new byte[] { 0x00, 0x00, 0x07, 0xec, 0x67, 0x01, 0x58, 0xe3 }, 1500);
            Console.WriteLine("PTWriteMsgs");
            Console.WriteLine(">>> 00 00 07 e4 27 02 75 6c");
            // 64 = ISO15765_FRAME_PAD
            channel1.SendMessages(new[] { new Message(new byte[] { 0x00, 0x00, 0x07, 0xe4, 0x27, 0x02, 0x75, 0x6c }, (TxFlag)64) });
            Console.WriteLine("ReadBlock");
            ReadUntilMessage(channel1, new byte[] { 0x00, 0x00, 0x07, 0xec, 0x67, 0x02 }, 1500);
            Console.WriteLine("PTWriteMsgs");
            Console.WriteLine(">>> 00 00 07 e4 ae fc 02 00 00 46 00");
            // 64 = ISO15765_FRAME_PAD
            channel1.SendMessages(new[] { new Message(new byte[] { 0x00, 0x00, 0x07, 0xe4, 0xae, 0xfc, 0x02, 0x00, 0x00, 0x46, 0x00 }, (TxFlag)64) });
            Console.WriteLine("ReadBlock");
            ReadUntilMessage(channel1, new byte[] { 0x00, 0x00, 0x07, 0xec, 0xee, 0xfc }, 1500);
            Console.WriteLine("PTWriteMsgs");
            Console.WriteLine(">>> 00 00 07 e4 ae fc 02 00 00 49 00");
            // 64 = ISO15765_FRAME_PAD
            channel1.SendMessages(new[] { new Message(new byte[] { 0x00, 0x00, 0x07, 0xe4, 0xae, 0xfc, 0x02, 0x00, 0x00, 0x49, 0x00 }, (TxFlag)64) });
            Console.WriteLine("ReadBlock");
            ReadUntilMessage(channel1, new byte[] { 0x00, 0x00, 0x07, 0xec, 0xee, 0xfc }, 7000);
            Console.WriteLine("Pause");
            Console.WriteLine("Sleep(2000)\n");
            Thread.Sleep(2000);

            Console.WriteLine("PTStopMsgFilter");
            channel1.StopMsgFilter(filter1);
            Console.WriteLine("PTStopMsgFilter");
            channel1.StopMsgFilter(filter2);
            
            Console.WriteLine("PTDisconnect");
            channel1.Dispose();

            Console.WriteLine("PTClose");
            device1.Dispose();
        }

        static void ReadUntilMessage(Channel c, byte[] message, int timeout)
        {
            var attempts = 5;
            Console.WriteLine("ReadUntilMessage: " + BytesToHexString(message));
            while (true)
            {
                var results = c.GetMessages(1, timeout);
                PrintBytes(results);
                if (results.Result == ResultCode.BUFFER_EMPTY)
                {
                    Console.WriteLine("Waiting for message...");
                    attempts--;
                    if (attempts == 0) return;
                    continue;
                }
                if (results.Messages.Length == 1)
                {
                    if (results.Messages[0].Data.SequenceEqual(message))
                    {
                        Console.WriteLine("FOUND\n");
                        return;
                    }
                }
            }
        }

        static string BytesToHexString(byte[] bytes)
        {
            StringBuilder builder = new StringBuilder();
            for (int i = 0; i < bytes.Length; i++)
            {
                builder.Append(bytes[i].ToString("x2"));
            }
            return builder.ToString();
        }

        static void PrintBytes(GetMessageResults results)
        {
            StringBuilder builder = new StringBuilder();
            foreach (var msg in results.Messages)
            {
                for (int i = 0; i < msg.Data.Length; i++)
                {
                    builder.Append(msg.Data[i].ToString("x2"));
                }
                builder.Append("\n");
            }
            Console.WriteLine(builder.ToString());
        }

    }
}