Applicability
MaxxECU MINI REV10+; other revisions need their own wiring reference.
Hardware features
MINI provides four high-impedance injector and four logic ignition outputs. It has no internal wideband controller, knock input or throttle motor driver. Sequential operation assigns HOME to a digital input.
I/O and driver ratings
Ignition outputs are control signals. Coils need suitable built-in igniters or a matching external module. Check injector drivers and auxiliary output electrical types separately.
| Item | Specification / revision condition |
|---|---|
| Engine configuration | Up to 4 sequential; up to 8 in wasted spark |
| Injector outputs | 4 high-impedance outputs |
| Ignition outputs | 4 × 5 V logic-level outputs |
| Auxiliary outputs | 4 GPO |
| Analogue inputs | 2 × 0–5 V |
| Digital inputs | 2 Hall inputs |
| Trigger inputs / signal | 1 VR / Hall |
| Manifold pressure | 400 kPa absolute; approximately 3 bar boost at sea level |
| Wideband lambda | External controller required |
| Data logging | 8 MB onboard; internal ≤1000 Hz, PC logging 20 Hz |
| Software / communication | MTune via USB; CAN expansion |
| Operating supply | 8–22 V DC |
| Temperature inputs | Dedicated IAT and CLT inputs |
| Electronic throttle | No built-in drive-by-wire motor outputs |
| Knock inputs | No built-in knock sensor inputs |
| CAN communication | CAN expansion; no built-in Bluetooth |
| USB PC logging rate | 20 Hz; independent of the onboard logging maximum |
| Trigger diagnostics | Built-in trigger oscilloscope and trigger logger in MTune |
| Boost control | Open / closed loop; three stages with compensation tables |
| GPO driver rating | GPO 1–3 and GPO 8: 2 A per output |
| Sequential HOME input | Cam / HOME uses one digital input; retain the main crank trigger input |
Power, sensor ground and shielding
The diagrams distinguish engine ground, sensor ground and trigger shields. Do not connect sensor ground to chassis ground. Follow the specified shield termination and separate sensitive wiring from ignition and injector current paths.
Crank / cam and synchronization
In MTune select the actual trigger pattern, sensor type and edge. Check cranking RPM and synchronization first; an RPM reading does not establish correct cylinder phase or ignition reference. Use the trigger oscilloscope and logger to investigate tooth patterns, polarity and signal quality.
Verification before first start
With the engine stopped, check temperature, TPS, MAP and supply readings. Confirm output allocation, cylinder numbers and firing order. Test loads using the output-test procedure, verify locked ignition timing with a timing light, then make a brief first start while logging sensor states.
Reference documents
- MaxxECU — GEN1 pinout and model wiring diagrams
- Document language: English
- Document revision: GEN1
- Referenced chapters: MINI 32-pin, SPORT / RACE connector 1, RACE connector 2
- MaxxECU — GEN1 quick guide and troubleshooting
- Document language: English
- Referenced chapters: Trigger sync, output tests, first ignition and connection diagnosis
