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• Visteon 281077 (radio type R013 ‑ “R & GO”, Renault Twingo III / Clio IV / Master III FL) uses a single “Renault Quad-Lock” connector with 40 cavities, of which 32 are normally populated.
• Viewed on the set with the latch at the top and the PCB facing you, pin 1 is top-left.
• The functions generally accepted by Renault/Visteon service documentation and field measurements are:
| Pin | Function | Remarks |
|---|---|---|
| 1 | +12 V Battery (B+) | Keep-alive, fused (F10/F3, vehicle-dependent) |
| 2 | +12 V Ignition / ACC | “APC” or “SWITCHED” line |
| 3 | Chassis ground | Main 0 V |
| 4 | Illumination / dimmer input | Lights-on sense (0…12 V) |
| 5 | LF speaker + | 4 Ω load |
| 6 | LF speaker – | |
| 7 | RF speaker + | |
| 8 | RF speaker – | |
| 9 | LR speaker + | |
| 10 | LR speaker – | |
| 11 | RR speaker + | |
| 12 | RR speaker – | |
| 13 | Antenna amplifier / remote-out | ≈12 V, ≤150 mA |
| 14 | Audio mute in | Low = mute |
| 15 | Reverse-gear sense | +12 V when “R”; camera trigger |
| 16 | Vehicle-speed signal (VSS) | 0…10 kHz square wave |
| 17 | CAN-L (Multimedia-CAN) | 125 kbit/s |
| 18 | CAN-H | |
| 19 | Steering-wheel remote key 1 | Resistor ladder |
| 20 | Steering-wheel remote key 2 / GND | |
| 21 | USB VBUS +5 V | 500 mA max |
| 22 | USB D+ | |
| 23 | USB D– | |
| 24 | USB ground | |
| 25 | Microphone + | Differential, 2.2 kΩ bias |
| 26 | Microphone – | |
| 27 | AUX Right (tip) | |
| 28 | AUX Left (ring) | |
| 29 | AUX ground (sleeve) | |
| 30 | Option / diagnostics | Variant-dependent |
| 31 | — (not fitted) | |
| 32 | — (not fitted) |
Pins 33-40 exist mechanically but are not populated on the 281077 harness.
Connector family
• Visteon adopted the FAKRA/Quad-Lock family specified in ISO 10487-4, but Renault omits the conventional A/B/C/D colour keys and uses its own 2-by-20 housing (4 rows × 10). For R013 only the first 32 positions are wired.
Numbering scheme
• Renault documentation numbers cavities sequentially 1-40 (top-left to bottom-right). If you have only “A/B/C/D block” marking, convert by simple arithmetic (A1=1, A2=2 … D8=40).
Why you may see “32-pin” vs. “40-pin” in forums
• Older posts simply count the populated pins (32). Hardware manuals quote the full cavity count (40). Both refer to the same physical connector.
Security and CAN pairing
• The head unit expects the VIN/immobiliser frames on CAN-L/CAN-H (pins 17/18). If transplanted to another vehicle it will remain locked or mute until re-programmed with Renault Clip, DDT4All, or an emulator.
Variants
• Some Clio IV/Trafic units have an internal GPS PCB; then pin 30 changes to “GPS 1 PPS”, pins 31-32 carry “UART service”. Always verify in the specific vehicle wiring diagram before final wiring.
• Recent 2023-2024 model-year Twingo III (phase 3) keeps the same connector/pinout, but Bluetooth and USB enumeration is handled by a new Cypress CYW chip – no impact on the mechanical pinout.
• Aftermarket harness suppliers (e.g., Axxess, Connects2) now sell plug-and-play break-outs for “R & GO / 281077”, mapping the above pinout to DIN-ISO plugs to retrofit amplifiers or Android head units.
• Speaker lines are “BTL” outputs from a class-D TDK IC, thus none of the pins can be tied to chassis ground.
• The dimmer pin (4) expects 5…12 V PWM; applying a fixed 12 V makes the display stay in day-mode.
• USB lines comply with USB 2.0 High-Speed; differential impedance 90 Ω ±10 %.
• Radio security pairing protects against theft; circumventing it may violate local anti-tampering legislation.
• Always disconnect the battery (air-bag safety) before pin probing.
• Renault occasionally swaps VSS (16) and Reverse (15) in right-hand-drive harnesses; check loom colours (white = VSS, purple = Reverse).
• If your unit carries a suffix “PH2-2”, internal microphone is mounted and external mic (25/26) will be absent.
• Renault wiring manuals (Dialogys – section 87A, sheet 871-15).
• Community reverse-engineering thread: “Visteon R013 pinout” on elektroda.com.
• Examine the MCU pins on the main PCB (MCU = NXP S32K148), CAN transceiver = TJA1051, to follow signal paths.
Visteon 281077 (R013 “R & GO”) uses a 40-cavity Renault Quad-Lock; 32 of those cavities are populated. The key circuits are:
• Pins 1/2 = permanent & switched +12 V
• Pin 3 = ground
• Pins 5-12 = four loudspeakers
• Pins 17/18 = Multimedia CAN (security pairing)
• Pins 21-24 = USB
• Pins 25-29 = Mic & AUX.
Always cross-check against the vehicle’s specific wiring chart, especially for optional lines (15/16/30).
