CAN Test Box

At first glance, the need for a breakout box may not be apparent as you can probe the OBD connector terminals quite easily to measure the values present on each of the 16 pins. However, the 16-pin BOB comes into its own when we start looking at speed, accuracy and security, which is essential during any diagnosis.

Simply connect the 16-pin BOB to the OBD connector and you can immediately confirm the presence of battery voltage and vehicle ground. This is thanks to the illuminated LEDs around the respective 4 mm banana sockets for pins 16 and 4. We can now instantly confirm that power and ground are present at the OBD connector and our 16-pin BOB can now provide additional information on the status of the remaining OBD terminals.

Depending on the age and style of the vehicle,  LEDs 6 and 14 may be flashing to indicate activity on both CAN Hi and CAN Lo circuits along with LED 5, to confirm the presence of signal ground for several power unit sensors.

At this stage, no additional test equipment has been installed and yet we have gathered a wealth of diagnostic information. To monitor the signals present on any terminal of the OBD connector, the 4 mm banana sockets on the BOB allow for secure connection of PicoScope probes that will remain connected during road testing or wiggle testing of the wiring harness.

Further information can be found in this Guided Test, where our BOB is in action capturing CAN signals in a secure and non-intrusive fashion.

16 Pin CAN Test Box

The CAN Test Box gives you easy access to the 16 pins of the diagnostic connector that is fitted to all modern vehicles. Depending on the configuration of the vehicle, this may allow you to check power, ground and CAN Bus signal quality. With the test adaptors supplied you can connect your PicoScope automotive scope, or any other suitable scope, to the CAN Test Box to monitor any signals present, such as the CAN High and Low signals.

The CAN Test Box connects to a vehicle᾿s OBDII / EOBD connector and lets you easily diagnose electrical faults.

  • Instantly check power and ground circuits
  • Identify communication link protocols
  • Connect an oscilloscope for signal capture and collection of signal waveform data
  • Compatible with both 12V and 24V vehicles
In stock. Available for despatch.

How does it work?

The CAN Test Box uses numbered backlit LEDs which illuminate when signal data is present on the corresponding pin of the DLC. Pulsing LEDs indicate signals being pulled high/low.

The LEDs indicate the following signals:

  • LED 1/9 - 485A/485B (Manufacturer’s proprietary information)
  • LED 2/10 - Bus+ Line J1850/Bus- Line J1850
  • LED 3/8/12/13 - future upgrade
  • LED 4 - Chassis GND (GROUND)
  • LED 5 - Signal GND (SIGNAL)
  • LED 6/14 - CAN High of SAE J2284/CAN Low of SAE J2284
  • LED 7/15 K Line of ISO9141-2 and keyword 2000485A/L Line of ISO9141-2 and keyword 2000
  • LED 11 - Clock
  • LED 16 Batt+ (Voltage supply)

The CAN Test Box allows you to connect your PicoScope oscilloscope or any other compatible scope, enabling you to monitor any signals present such as the CAN High and Low signals. The CAN Test Box terminal pin ports are compatible with standard 4 mm jacks.

The CAN Test Box includes a 2.5 metre (8.2 feet) cable so that you can work in a convenient location away from the diagnostic connector, and an additional pass-through connector so that you can hook up your scan tool at the same time as your scope. The box is powered by the diagnostic connector, so no batteries or mains adaptor are needed.

Typical Uses

The connection of the Can Test Box to the 16 pin vehicle diagnostic connector provides a non-intrusive test point for all associated circuits, whilst LED’s will illuminate to indicate the status of the 16 pins. The 4mm banana sockets enable simple connection of PicoScope for circuit analysis, “jumper wires” for flash code interrogation, and on board “memory save” devices (During battery disconnection) With the pass-through connector and 2.5 meter cable, the Can Test Box can be used in series with your scan tool and remote from the 16 pin connector allowing for simultaneous scan tool and scope tests. (See below)

  • Power and ground test for communication errors
  • CAN HI CAN LOW activity (depending on manufacturer)
  • Convenient “jumper wire” access point for flash code access or initialisation procedures
  • Convenient point for “memory save” device connection
  • Remote access to concealed 16 pin connectors via 2.5 meter cable
  • Pass-through feature does not restrict scan tool access when connected   
Title Language Issue Size Updated All products All languages All documents Status
PP619 CAN Test Box User’s Guide 5 1 MB Apr 07 2022 Breakout leads/boxes open
CAN Test Box Kurzübersicht Benutzerhandbuch german 2 558 KB Apr 07 2022 Breakout leads/boxes german open

Accessories for the CAN Test Box

Product Price Quantity
Foam tray for TA069 CAN test box

Customer reviews

2 reviews | Add review

Jerry smith
CAN Test Box

Works great for can diagnostics. Especially with K line that needs a scantool hooked up while testing data waveform

Robert Burgy
CAN Test Box

If you are serious about diagnostics. This product is a must!
Use it to check your Bus connection and data. You can’t go wrong with this
product. easy to use. Very well built product.

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