This software is designed to emulate a second PCM/ECM and read a bunch of sensors and send the data over the appropriate J1939 PGNs. Everything in this repo is learned from reverse engineering, using data found on github, things shared on facebook, etc. So do your own testing if you decide to use it.
This Sensor Module can read and provide data for up to 19 sensors.
- Ambient Temp
- Relative Humidity
- Absolute Barometric Pressure
- EGT
- Oil Temperature
- Oil Pressure
- Coolant Temperature
- Coolant Pressure
- Transfer Pipe Temperature
- Transfer Pipe Pressure
- Boost Pressure
- Boost Temperature
- CAC Inlet Pressure
- CAC Inlet Temperature
- Air Inlet Temperature
- Air Inlet Pressure
- Fuel Pressure
- Fuel Temperature
- Engine Bay Temperature
The hardware has 48 pins on 4 plugs and is pinned out as follows.
| Pin A | Pin B | Pin C | Pin D |
|---|---|---|---|
| 1. Fuel Pressure - | 1. Oil Temperature + | 1. CAC Inlet Pressure + | 1. Transfer Pipe Temperature - |
| 2. Fuel Pressure Signal | 2. Oil Pressure Signal | 2. CAC Inlet Temperature + | 2. Transfer Pipe Pressure - |
| 3. Fuel Temp + | 3. Coolant Temperature + | 3. Air Inlet Temperature + | 3. Boost Temperature - |
| 4. Engine Bay Temp + | 4. Coolant Pressure Signal | 4. Air Inlet Pressure Signal | 4. Can Shield Ground |
| 5. Fuel Temp - | 5. Oil Temperature - | 5. Air Inlet Pressure + | 5. Egt+ |
| 6. Engine Bay Temp - | 6. Oil Pressure - | 6. Boost Pressure + | 6. Egt- |
| 7. 12 Volt Power | 7. Coolant Temperature - | 7. Air Inlet Pressure - | 7. Boost Pressure - |
| 8. 5 Volts for BME280 | 8. Coolant Pressure - | 8. CAC Inlet Pressure Signal | 8. Transfer Pipe Temperature + |
| 9. Ground | 9. Oil Pressure + | 9. CAC Inlet Pressure - | 9. Transfer Pipe Pressure Signal |
| 10. Ground for BME280 | 10. Coolant Pressure + | 10. CAC Inlet Temperature - | 10. Boost Pressure Signal |
| 11. SCL for BME280 | 11. CanH | 11. Air Inlet Temperature - | 11. Boost Temperature + |
| 12. SDA for BME280 | 12. CanL | 12. Fuel Pressure + | 12. Transfer Pipe Pressure + |
This module sends the sensor data over canbus using J1939 messages.
PGN 65269 - 1 seconds spn171 Ambient Air Temperature "Sensor 1" spn172 Air Inlet Temperature "Sensor 15" spn108 Barometric Pressure "Sensor 3"
PGN 65270 - .5 seconds spn173 Exhaust Gas Temperature "Sensor 4" spn102 Boost Pressure "Sensor 11" spn105 Intake Manifold 1 Temperature "Sensor 12" (Boost Temperature) spn106 Air Inlet Pressure "Sensor 16"
PGN 65262 - 1 seconds spn175 Engine Oil Temperature 1 "Sensor 5" spn110 Engine Coolant Temperature "Sensor 7" spn174 Fuel Temperature "Sensor 18"
PGN 65263 - .5 seconds spn100 Engine Oil Pressure "Sensor 6" spn109 Coolant Pressure "Sensor 8" spn94 Fuel Delivery Pressure "Sensor 17"
PGN 65129 - 1 seconds spn1637 Engine Coolant Temperature (High Resolution) "Sensor 7" (Coolant Temperature) spn1363 Intake Manifold 1 Air Temperature (High Resolution) "Sensor 12" (Boost Temperature)
PGN 65189 - 1 seconds spn1131 Intake Manifold 2 Temperature "Sensor 14" (CAC Inlet Temperature) spn1132 Intake Manifold 3 Temperature "Sensor 9" (Transfer Pipe Temperature) spn1133 Intake Manifold 4 Temperature "Sensor 15" (Air Inlet Temperature)
PGN 65190 - .5 seconds spn1127 Turbocharger 1 Boost Pressure "Sensor 13" spn1128 Turbocharger 2 Boost Pressure "Sensor 10"
PGN 65164 - On Request spn354 Relative Humidity "Sensor 2" spn441 Auxiliary Temperature 1 "Sensor 19" (Engine Bay Temperature)