Introduction

This manual describes the installation of the LinBuster interface
in VAG vehicle with a LIN-Bus connected hazard light switch.

This interface is used to control the hazard light from an external device, like an alarm system.

Functions

Simple ground switching input signal.
Blinks as long as input wire is grounded.
Retains full vehicle switch function.
Works in all vehicle ignition modes.
Sleep mode with ultra-low power consumption (approx. 50 µA / 0.05 mA).

Installation

The interface connects to the LIN-bus wire,
that connects the hazard light switch to the BCM.

The connection can be made on the side of the BCM or at the switch.
Consult your alarm supplier, or vehicle technical documentation for more specific instructions.

Find the +30 (permanent 12v) and ground wire, that go to the switch.
Add the Black and red wire to these wires
Connect the BCM/CAR side of the cut LIN wire to the grey interface wire.
Connect the SWITCH side of the cut LIN wire to the brown interface wire.
Connect the ALARM output to the purple interface wire.

Interface	Car connection
Red	+30 (12V)
Black	GND
Brown	LIN-Bus (Switch side)
Grey	LIN-Bus (BCM side)
Purple	Trigger input from alarm

Connection Diagram

Status LED

The interface has a small status led, behind the white shrink tube.
The blinking pattern indicates the status.

Blink	Status
10 fast blinks	Entering sleep mode
ON	Not initialized, no data reception
ON with 1 off blink	Receiving data, trying to detect car model
ON with 2 off blinks	Car model detected, analysing communication pattern
1 fast blink	Normal operation, no LIN data received
2 fast blinks	Normal operation, LIN data received
1 long blink	trigger change detected *1

*1 Only during normal operation, during init the trigger input is not active

Coding

No coding is required.

Testing

You can test the system by manually grounding the input wire,
the blinkers should blink as long as you ground it.