BSU - A MUST HAVE for the professional diagnostic workshop 
Fault Code Reading, ECU or Module Re-Programming and ABS Brake Bleeding - They all require the vehicle ignition to be switched on for extended periods of time which can rapidly discharge the battery causing work to stop, loss of data or worse damage to sensitive electronic components.
When connected the BSU units provide an optimum, constant voltage for vehicle programming. This also prevents loss of battery charge, and ensures that the battery is not discharged at the end of the job.
The function of the BSU units can be monitored by the three led's, showing that it is switched on, connected to the battery correctly and power is flowing.
Powerful Output
The power of the BSU range is enough to maintain the charge of a healthy battery during any diagnostic or programming operation. The BSUs maintain sufficient voltage by monitoring and regulating the charge dependent on battery state and drain on the system.
| BSU1 |
25amp continuous |
| BSU2 |
50amp continuous |
| BSU3 |
70amp continuous (selectable) |
The Problem 
The reprogramming of ECU modules and fault code diagnostics requires the ignition switched on without the engine running. (Key On - Engine Off). This means that during the programming event, the vehicle's systems are operating from the battery. So maintaining battery charge is critical.
If the battery voltage alters significantly during reprogramming, the program can fail, or worse still - the ECU becomes corrupt and useless. With ECU's costing up to £1000, can you afford to take the risk?
The Solution
The BSU1 provides a stable voltage and up to 25amps of fully regulated power to prevent loss of charge and damage to the battery. Ideal for general vehicles with average consumption.
The BSU2 provides up tp 50amps of power, ideal for high power consuming vehicles such as Land Rover, BMW and Mercedes.
The new BSU3 provides an all-in-one solution, providing a selectable output voltage of 12.7v, 13.8v and 14.8v, which provides up to a massive 70amps power. This unit gives the flexibility to cover all vehicles with varying voltage and current requirements, up to and including high spec vehicles with large demands.
All Ford dealers have a BSU to support the vehicle voltage when using the IDS dealer diagnostic tool.
The Professional Approach
Whether you are repairing a vehicle, testing electrical circuits, carrying out diagnostic procedures, reprogramming ECUs / modules or programming vehicle keys, there is always a need to use some form of battery support.
Until now, the options have been a slave battery, battery charger or boost pack; each one of these options is far from ideal.
Firstly, with cables draped all over the car, it gives a less than professional look for the customer. Slave batteries and boost packs equally go flat over time. Battery chargers increase the voltage to above operating voltages and inhibit reprogramming procedures, potentially damaging your test equipment.
Using a Battery Support Unit (BSU) maintains an ideal battery voltage throughout the period of repair or reprogramming, at the optimum voltage. It offers over-voltage protection against damage to test equipment and under-voltage protection when reprogramming ECUs etc.
Of equal importance is the professional appearance portrayed by the use of a BSU unit.
The BSU is manufactured in the UK by Traction Chargers for the original equipment market. Ford dealers use the BSU for programming ECUs with the IDS dealer tool.
The BSU is the Approved Dealer Tool for Ford.
The BSU2 is the Approved Dealer Tool for Jaguar and Land Rover.
The BSU3 is recommended for high spec vehicles, such as BMW, Range Rover, Mercedes, Audi, Lexus, Porsche etc.
Other Applications
| • |
The BSU can be used with any 12v automotive battery to maintain voltage. |
| • |
When the battery is fully charged the BSU is a regulated power supply to sustain accessory loads and offset parasitic drain on any vehicle. |
| • |
Can be used in the vehicle showroom to maintain the battery charge while power consuming accessories are being demonstrated without fear of power loss. |
| • |
Ideal for maintaining voltage on motorhomes, boats, garden machinery etc. |
| • |
Demonstration vehicles |
Specifications for BSU1
| • |
Unique moulded case with no sharp edges is safe to use around the vehicle; it can be wall or tool chest mounted or used under the hood. |
| • |
Reverse polarity protection |
| • |
Detachable 9ft leads for easy replacement |
| Input Voltage : |
100VAC–120VAC / 200VAC–240VAC (Auto Selection) |
| Output : |
up to 25 amps continuous |
| Weight : |
1.2 kgs approx |
| Size : |
W= 170mm, L= 250mm, H= 130mm |
Specifications for BSU2
| • |
Rugged steel case with high specification output leads and clamps. |
| • |
Designed to be wall, ramp or trolley mounted |
| • |
Reverse polarity protection |
| Input Voltage : |
100VAC–120VAC / 200VAC–240VAC (Auto Selection) |
| Output : |
13.4v up to 50 amps continuous |
| Weight : |
2.1 kgs approx |
| Size : |
W= 112mm, L= 257mm, H= 130mm |
Specifications for BSU3
| • |
Rugged steel case with high specification output leads and clamps. |
| • |
Designed to be wall or ramp mounted |
| • |
Reverse polarity protection |
| Input Voltage : |
100VAC / 240VAC |
| Output : |
12.7 - 14.8v up to 70 amps continuous |
| Weight : |
2.1 kgs approx |
| Size : |
W= 115mm, L= 298mm, H= 145mm |
