Diag4 Bike Parallel Diagnostic System Adapter - 36 PIN Delphi - Harley & Indian V-Twin
About Diag4 Bike
Diag4 Bike parts and accessories are stocked at Vtwinbikers for Harley-Davidson and Indian Motorcycle applications. Every Diag4 Bike item we list is new and sourced through authorized distribution. If you are not certain a part matches your year and model, use Shop by Bike or email our team before you order and we will confirm fitment first.
The Diag4 Bike Parallel Diagnostic System Adapter with a 36-pin Delphi connector is engineered for precise, real-time measurement of EFI module input and output signals on running V-twin engines. This breakout box system inserts between your EFI module and motorcycle wiring harness, enabling full diagnostics without interrupting normal engine operation. It's an essential tool for advanced troubleshooting and tuning.
Why riders pick this
- Real-time EFI signal measurement on running engines
- Breakout box for non-invasive diagnostics
- Access all 36 Delphi EFI connector pins
- Essential for advanced V-twin troubleshooting
When you're chasing down an elusive EFI issue or fine-tuning your V-twin's performance, live data is king. The Diag4 Bike Parallel Diagnostic System Adapter provides exactly that, allowing you to monitor crucial signals in real-time. No more guessing games; see exactly what your EFI module is doing under actual operating conditions.
Precision Diagnostics for Running Engines
- Enables real-time measurement of EFI module input and output signals
- Breakout box design for in-line installation without interrupting engine function
- Clearly labeled monitoring points provide access to all EFI connector pins
- Designed for motorcycles equipped with 36-pin Delphi EFI connectors
Troubleshoot with Confidence
This adapter is built for technicians and serious DIYers who demand accurate data. By allowing the engine to run normally during diagnosis, you can capture intermittent faults and observe system behavior that might not appear in static tests. Pair it with your existing diagnostic tools for a comprehensive view of your V-twin's electronic fuel injection system.
Specifications
- Brand: Diag4 Bike
- Manufacturer Part #: AT 531 4014
- Connector Type: 36-pin Delphi
- Length: 11.5 in
- Width: 7.25 in
- Height: 2.25 in
- Weight: 2.1516 lbs
- Country of Origin: Czech Republic
Common questions
Can I use this adapter while my motorcycle's engine is running?
Yes, this Diag4 Bike adapter is specifically designed for parallel diagnostics on running engines. The breakout box allows full system operation without interruption.
What type of connector does this adapter work with?
This specific adapter is designed for motorcycles equipped with 36-pin Delphi EFI connectors.
Do I need any other tools to use this diagnostic adapter?
This adapter provides access to the EFI signals. You will typically need a digital multimeter or an oscilloscope to measure and interpret the signals from the breakout box pins.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | Diag4 Bike |
| TYPE | Engine Management |
| SKU | 867-02023 |
| WEIGHT | 2.15 lb |
