VRFBM-77i - Unspecified CRUX - Free user manual and instructions

Product Type	Vehicle Radio Replacement Interface
Brand	CRUX
Model	VRFBM-77i
Compatible Vehicles	Select BMW and Mini models (2002-2010)
Dimensions	2.5 x 1.5 x 0.5 inches (63.5 x 38.1 x 12.7 mm)
Weight	0.2 lbs (90 g)
Power Supply	12V DC, <500 mA
Primary Functions	Retain factory features (steering wheel controls, Bluetooth, AUX), provide data bus integration for aftermarket radios
Input/Output	ISO connectors, vehicle-specific harness, signal wires for steering wheel control and speed pulse
Installation	Plug-and-play with soldered connections; requires vehicle-specific wiring adapters
Compatibility	Works with most aftermarket CD/DVD/Navigation receivers
Cleaning and Maintenance	Wipe with a dry, soft cloth. Avoid liquids and cleaners.
Safety Precautions	Disconnect vehicle battery negative terminal before installation to prevent short circuits.
Spare Parts and Repairability	No user-serviceable parts. Contact CRUX support for module replacement.
Warranty	1-year limited warranty against defects
Manufacturer	CRUX Interfacing Solutions
Package Contents	Module, harness, instruction manual
Operating Temperature	-22°F to 185°F (-30°C to 85°C)

Frequently Asked Questions - VRFBM-77i CRUX

What vehicles is the CRUX VRFBM-77i compatible with?

The VRFBM-77i is designed for select BMW and Mini models from 2002 to 2010. Check CRUX's website for a full list.

Will I retain my factory steering wheel controls?

Yes, the module integrates with factory steering wheel controls and retains volume, track, and mode functions.

Does it support Bluetooth?

The module retains factory Bluetooth for phone calls and audio streaming if your vehicle originally had it.

How do I install the VRFBM-77i?

Disconnect the battery, connect the module between your vehicle harness and aftermarket radio using the included wiring adapter, and secure with zipties.

My aftermarket radio is not turning on. What could be wrong?

Check that all connections are secure, especially the 12V constant and accessory wires. Ensure the vehicle battery is reconnected.

Can I use this module with a non-BMW radio?

Yes, it works with most aftermarket single-DIN or double-DIN radios, but wiring may vary.

Does the module require programming?

No, the VRFBM-77i is plug-and-play. Some advanced settings may be configurable via dip switches.

What does the 'VRFBM' stand for?

VRFBM likely stands for 'Vehicle Radio Factory Bus Module', indicating it retains factory data bus functions.

Is the module repairable?

The module contains no user-serviceable parts. If defective, contact CRUX for a replacement under warranty.

Where can I find the installation manual?

The manual is available for free download on notice-facile.com in the product page for VRFBM-77i.

USER MANUAL VRFBM-77i CRUX

Vehicle Applications

BMW

2015-2016 i3*

Product Features

• With OE type Dynamic Parking Guide Lines
• On-screen display and setup
• 2 trigger outputs (+12V max. 1A), separately adjustable switching events (CAN, ACC, rear-view camera, reverse gear)
  • Rear-view camera input
• Front camera input
• Front camera input can also be used as an Auxiliary Video Input
  • Automatic switching to rear-view camera input on engagement of reverse gear from all operation modes
• Forced rear-view camera option (only on vehicles with PDC button)
• Manual return from rear-view and front camera (cancellation of automatic switching)
• Picture-in-picture mode combining after-market rear-view and front camera picture(s) with factory parking sensor graphics
• Compatible with all factory video accessories (e.g. rear-view camera, DVD-changer, etc.)
• Plug & Play installation

Navigation / Radio Compatibility

- For the BMW i3 with navigation system or radio and 6.5", 7", 8.8" or 10.25" monitor with 4+2pin HSD2 LVDS connector

Notes

- The interface is installed under the glove compartment and the radio headunit is located under the rear seat.

Parts Included

BM-77i Module

BM-77i Harness

4+2 PIN HSD2 LVDS Cable

Power/CAN Harness

i3-HAR

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Wiring Diagram

graph TD
    A["VRFBM-77i Module"] --> B["4+2 PIN HSD2 LVDS Female Vehicle Harness"]
    A --> C["Back of Factory Monitor"]
    A --> D["Male Quadlock on the Rear of the NBT Unit"]
    A --> E["Interface Box Front View"]
    A --> F["Power/CAN Harness"]
    A --> G["Front Camera (Not Included)"]
    A --> H["Back View Camera (Not Included)"]
    A --> I["DVD Player* (Not Included)"]
    A --> J["Portable Video Player* (Not Included)"]
    A --> K["Motor Control Panel"]
    A --> L["Motor Control Panel"]
    A --> M["Motor Control Panel"]
    A --> N["Motor Control Panel"]
    A --> O["Motor Control Panel"]
    A --> P["Motor Control Panel"]
    A --> Q["Motor Control Panel"]
    A --> R["Motor Control Panel"]
    A --> S["Motor Control Panel"]
    A --> T["Motor Control Panel"]
    A --> U["Motor Control Panel"]
    A --> V["Motor Control Panel"]
    A --> W["Motor Control Panel"]
    A --> X["Motor Control Panel"]
    A --> Y["Motor Control Panel"]
    A --> Z["Motor Control Panel"]
    A --> AA["Motor Control Panel"]
    A --> AB["Motor Control Panel"]
    A --> AC["Motor Control Panel"]
    A --> AD["Motor Control Panel"]
    A --> AE["Motor Control Panel"]
    A --> AF["Motor Control Panel"]
    A --> AG["Motor Control Panel"]
    A --> AH["Motor Control Panel"]
    A --> AI["Motor Control Panel"]
    A --> AJ["Motor Control Panel"]
    A --> AK["Motor Control Panel"]
    A --> AL["Motor Control Panel"]
    A --> AM["Motor Control Panel"]
    A --> AN["Motor Control Panel"]
    A --> AO["Motor Control Panel"]
    A --> AP["Motor Control Panel"]
    A --> AQ["Motor Control Panel"]
    A --> AR["Motor Control Panel"]
    A --> AS["Motor Control Panel"]
    A --> AT["Motor Control Panel"]
    A --> AU["Motor Control Panel"]
    A --> AV["Motor Control Panel"]
    A --> AW["Motor Control Panel"]
    A --> AX["Motor Control Panel"]
    A --> AY["Motor Control Panel"]
    A --> AZ["Motor Control Panel"]
    A --> BA["Motor Control Panel"]
    A --> BB["Motor Control Panel"]
    A --> BC["Motor Control Panel"]
    A --> BD["Motor Control Panel"]
    A --> BE["Motor Control Panel"]
    A --> BF["Motor Control Panel"]
    A --> BG["Motor Control Panel"]
    A --> BH["Motor Control Panel"]
    A --> BI["Motor Control Panel"]
    A --> BJ["Motor Control Panel"]
    A --> BK["Motor Control Panel"]
    A --> BL["Motor Control Panel"]
    A --> BM["Harness: BM-77i"]
    BM -->|i3-HAR (10 Ft.)| BN
    BN -->|+12V Switching Output (Green Wire)| CA
    BN -->|Reverse Gear Signal Input +12V (White Wire)| CB
    BN -->|+12V Switching Input (Pink Wire)| CC
    BN -->|+12V Switching Output (Green Wire)| DD
    BN -->|Reverse Gear Signal Input +12V (White Wire)| DE

Installation Instructions

Setting the DIP switches of the Interface Box.

DIPs 1 and 2 on the back of the interface-box is used to set the monitor size. DIP 3 must be set to OFF.

Vehicle/ Navigation	Dip 1	Dip 2	Dip 3
6.5" monitor.	OFF	OFF	No function
7" monitor	OFF	OFF	No function
8.8" monitor	ON	OFF	No function
10.25" monitor (ver.1)	ON	OFF	No function
10.25" monitor (ver.2)	ON	ON	No function

After each change of the DIP switch settings you have to execute a power reset of the interface box!

Connecting Interface box and harnesses

1 Remove the rear seat and locate the Radio Headunit. Unplug the Quadlock connector from the Radio Headunit.
2 Plug factory Quadlock connector into the BM-77i T-harness female Quadlock connector
3 Connect the male Quadlock connector of the BM-77i T-harness to the female Quadlock connector of the Radio Headunit.
4 Run the i3-HAR along the passenger side door sill from the Radio Headunit towards the glove compartment and plug it into the Power/CAN harness.
5 Connect the female 12pin AMP connector of the Power/CAN harness to the front side of the VRFBM-77i interface box.

LVDS Connection

1 Connect the female 4+2pin HSD2 LVDS connector of the LVDS cable to the male 4+2pin HSD2 LVDS connector (LVDS-OUT) on the front of the VRFBM-77i interface box.
2 Remove the female 4+2pin HSD2 LVDS connector of the vehicle harness from the factory monitor and connect it to the male 4+2pin HSD2 LVDS connector (LVDS-IN) on the front of the VRFBM-77i Interface box.
3 Connect the second female 4+2pin HSD2 LVDS connector of the LVDS cable the male 4+2pin HSD2 LVDS connector of the factory monitor.

LEDs of the Interface-box

• Valid input source
  CAN ok
  Power

Connection to the aftermarket front camera

Connect the video RCA of the after-market front camera to the female RCA connector "FRONT CAM" of the interface box.

The pink wire of the Power/CAN harness can be used for +12V electric power supply (max. 1A) of the aftermarket front camera. Configure in the OSD-menu "MISC", Menu item "POWER OUT 1" the designated electric power supply (see chapter "Configurable switching outputs").

Settings for connecting an aftermarket front camera

You have to configure some settings in the OSD-menu's INPUTS and MISC if you want to connect an aftermarket front camera (Operation of the OSD: see chapter "OSD-Operation").

OSD Menu	Menu item	Setting	Description
INPUT	FVC	OFF	No front camera connected
		ON	Switches to front camera if parking process is enabled and reverse gear is released
OPTION	PARK LOGIC	PDC	For vehicles with PDC button. Enabled while parking process and up to 12 mph or together with PDC if existing
		RGEAR	Enabled while parking process
		RGEAR+SPEED	Enabled while parking process and up to 12 mph
		RGEAR+TIME	Enabled while parking process and up to 20 second
	PARK CAM	ON	OEM PDC display of the vehicle

NOTES:

1) You can deactivate the enabled parking process by pressing the iDrive or by enabling other modes (e.g. radio). After deactivation you cannot enable the parking process again until the vehicle is driving faster than 12mph, the ignition is switched off and on OR the PDC will be disabled and enabled again, if present.

2) In case the image freezes in the Front View Camera mode, press the "Park Assist" button to go back to the radio mode.

Connection to the aftermarket rear-view camera

Connect the video RCA of the after-market rear-view camera to the female RCA connector "REAR CAM" of the interface box.

The green wire of harness Power/CAN harness can be used for +12V electric power supply (max. 1A) of the after-market rear-view camera. Configure in the OSD-menu "MISC", menu item "POWER OUT 2" the designated electric power supply (see chapter "Configurable switching outputs").

Settings for connecting an aftermarket rear-view camera

You have to configure some settings in the OSD-menus INPUTS and MISC if you want to connect an after-market rear-view camera (Operation of the OSD: see chapter "OSD-Operation").

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OSD Menu	Menu item	Setting	Description
INPUT	RVC	OFF	No rear-view camera connected
		ON	Switches to rear-view camera if reverse gear is engaged and/or PDC-display is displayed
		OEM	If a factory rear-view camera is existing, the interface turns off, if PDC or reverse gear is enabled and it displays factory rear-view camera and/or PDC-display
OPTION	PARK LOGIC	PDC	For vehicles with PDC button. Enabled while parking process and up to 12 mph or together with PDC if existing
		RGEAR	Enabled while parking process
		RGEAR+SPEED	Enabled while parking process and up to 12 mph
		RGEAR+TIME	Enabled while parking process and up to 20 second
	PARK CAM	ON	OEM PDC display of the vehicle

Note: You can deactivate the enabled parking process by pressing the iDrive or by enabling other modes (e.g. radio). After deactivation you can't enable the parking process again until the vehicle is diving faster than 12 mph the ignition is switched off and on or the PDC will be disabled and enabled again, if present.

Dynamic Parking Guide Lines

You have to configure some settings in the OSD-menu OPTION if you want to activate Dynamic Guide Lines.

Parking lot with yellow and red painted lines on paved pavement, parked cars in background (no text or symbols)

OSD Menu	Menu item	Setting	Description
OPTION	RVC LINES	OFF	Dynamic Guide lines deactivated
		ON	Dynamic Guide lines activated
	iDrive Type	Low	5 Button iDrive
		High	7 Button iDrive

Configurable Trigger Outputs

You can configure both +12V trigger outputs separately. The Pink wire is POWER OUT 1 and the Green wire is POWER OUT 2.

Note: You can configure the both trigger outputs in the OSD-Menu MISC separately (Operation of the OSD: see chapter "OSD-Operation").

OSD Menu	Menu item	Setting	Description
OPTION	POWER OUT1 (pink) POWER OUT2 (green)	CAN	+12V when the interface is on (red LED on)
		ACC	+12V when ignition is on
		CAM	+12V when the rear-view camera input is activated
		RGEAR	+12V when reverse gear is engaged
		AVS	+12V when interface video-source is active (for external audio switch)
		OFF	Trigger output deactivated

Picture settings

You can change the picture settings in the OSD-menu IMAGE (activation only from interface AV level possible).

• Brightness
• Contrast
• Saturation
  °Hue
• Sharpness

Note: The picture settings will be retained for each AV-source separately.

Operation

OSD – On-Screen Display

You can change the basic configurations of the interface in the OSD (on screen display) which can be controlled with the iDrive.

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iDrive High

graph TD
    A["Options"] --> B["Medium"]
    B --> C["Back"]
    C --> D["Medium"]
    D --> E["Short press=leave OSD"]
    E --> F["Options"]
    F --> G["Long press=enter OSD"]
    G --> H["Options"]
    H --> I["OK"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333
    style D fill:#fcc,stroke:#333
    style E fill:#cff,stroke:#333
    style F fill:#ffc,stroke:#333
    style G fill:#fcc,stroke:#333
    style H fill:#ffc,stroke:#333
    style I fill:#fcc,stroke:#333

iDrive Low

graph TD
    A["Back"] --> B["Options"]
    B --> C["OK"]
    D["Short press=leave OSD"] --> E["BACK"]
    F["Long press=enter OSD"] --> G["OPTION"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333
    style D fill:#fcc,stroke:#333
    style E fill:#cff,stroke:#333
    style F fill:#ffc,stroke:#333
    style G fill:#fcc,stroke:#333

iDrive selection

OSD menu, "OPTION" – "IDRIVE" is for setting the right iDrive control knob.

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iDrive High

iDrive Low

OSD-menu	Menu item	Setting	Description
OPTION	IDRIVE	LOW	Vehicles with iDrive Low control knob
		HIGH	Vehicles with iDrive High control knob

OSD – Additional setting options

The following settings in the OSD-menus OPTION and OSD can be configured over and above the described settings in this manual (Operation of the OSD: see chapter "OSD-Operation")

OSD-menu	Menu item	Setting	Explication
OSD	POS. X	0-xxx	Horizontal position of the OSD
	POS. Y	0-xxx	Vertical position of the OSD
	SIZE	SMALL	Small OSD menu windows
		LARGE	Large OSD menu windows
INFO	VERSION	X.XX.XX	Displays the current SW-version
OPTION	FACTORY RESET		Resetting to factory settings

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Video-In-Motion function

It is possible to activate and deactivate the video-in-motion in the OSD menu "OPTION" (Operation of the OSD: see chapter "OSD-Operation").

OSD Menu	Menu item	Setting	Description
OPTION	VIM	ON	Video-in-motion activated
		OFF	Video-in-motion deactivated

Selecting the interface as current video-source

A long press of the MEDIA button OR the AUDIO button, respectively, is used to choose the interface as current video source.

A short press of the MEDIA button OR the AUDIO button will switch the video sources. Each short press will switch to the next enabled input. If all inputs are enabled the order is:

Rear Cam → Front Cam →...

Inputs which are not enabled are skipped.

NOTE: A short press of either the BACK / RADIO / MENU / TEL / NAV button will exit to the factory screen.

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