J1939 OBD ECU Simulator
Part No.: MPOZ-mOByDic1700
A compact, single-chip solution for simulating Truck and Car ECUs over the J1939 protocol.
Product Description
Description
The OE91C1700 is designed to support engineers and developers working with the J1939 protocol. With just a handful of external components, this single chip simulates a fully functional ECU, generating realistic diagnostic output over a 29-bit, 250 kbps CAN bus. It supports a range of J1979-compliant diagnostic messages (DMs) and lets you interact with live sensor values in real time — simply by turning a potentiometer.
Whether you're validating a J1939 diagnostic tool, testing an OBD scanner, or building out a training rig, the OE91C1700 gives you a reliable, low-cost way to generate standards-compliant ECU traffic without needing an actual vehicle.
Key Features
- Fully compatible with the J1939 standard
- Wide operating voltage range: 2.7 V to 6 V
- Onboard MIL (Malfunction Indicator Lamp) output
- 29-bit / 250 kbps CAN bus communication
- Supports select J1979-compliant diagnostic messages (DMs)
- Simulates both Truck and Car ECUs
- Fixed ECU source address: 0x00
- 5 onboard potentiometers for live, adjustable sensor values
- Built-in DTC (Diagnostic Trouble Code) generation and MIL indicator logic
How It Works
When the DTC input pin is pulled low, the simulator generates a diagnostic trouble code and turns on the MIL LED. The LED remains lit until an "erase DTC" command is received over the bus — mirroring real-world ECU behavior. Live values such as engine coolant temperature, engine speed, accelerator pedal position, vehicle speed, and intake manifold pressure can all be adjusted on the fly using the five onboard potentiometers.
Supported Diagnostic Messages & Parameter Groups
| PGN | Message | Description |
|---|---|---|
| 65262 (ET1) | Engine Temperature 1 | Coolant, fuel, oil, turbocharger and intercooler temperatures |
| 65269 (AMB) | Ambient Conditions | Barometric pressure, cab/ambient/road temperatures |
| 65257 (LFC) | Fuel Consumption (Liquid) | Trip fuel and total fuel used |
| 61444 (EEC1) | Electronic Engine Controller 1 | Engine speed, torque mode, percent torque |
| 61443 (EEC2) | Electronic Engine Controller 2 | Accelerator pedal position, engine load |
| 65270 (IC1) | Inlet/Exhaust Conditions 1 | Intake manifold pressure, exhaust gas temperature |
| 65132 (TCO1) | Tachograph | Vehicle speed, driver working state |
| DM1 | Active Diagnostic Trouble Codes | Lamp status, SPN/FMI, occurrence count |
| DM5 | Diagnostic Readiness | OBD compliance, monitor status |
| DM11 | Diagnostic Data Clear/Reset | Clears active DTCs on request |
Applications
- Bench-testing J1939 diagnostic tools and scan tools
- Validating OBD/J1979 compliant readers
- Training and educational rigs for automotive diagnostics
- Prototyping and development of truck/car CAN networks
Package
28-pin package, operating on a 16 MHz crystal, with dedicated CAN Rx/Tx, analog input channels, reset, and status LED outputs.
Note:
2. EOL products will not be notified separately.
3. Product images are for reference only. Actual products may vary depending on the version or specifications.
4. Product information, specifications, and availability are subject to confirmation at the time of order.