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CAN Test Box

can test box


Continuing with our mission to make vehicle diagnostics easier and faster…the new 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 leads supplied you can connect your PicoScope lab scope to the CAN Test Box to monitor signals such as the CAN High and Low. More.....

Attention all
Automotive Scope Users

Pico Automotive Scope software now sports a new Waveform Library browser.
Must own PicoScope to view.
See details here


We have just posted a few new Automotive Tutorials and Case studies Here is the latest:
Honda Rattle

New Kvaser white paper discusses ways to maximise CAN’s efficiency in next generation vehicles

By using a Virtual CAN Bus, we separate the control task from other tasks. The distributed embedded control system can be developed using standard CAN Controllers and transceivers in a traditional way with well proven tools.

Other tasks such as encryption, transmitter authentication, re-flashing, etc. can be developed by experts in these fields and carried out by using other protocols. With modern technology, the different tasks can run in parallel and simultaneously communicate on the same physical layer.

It is a great advantage to separate the control problems from other problems. The control problem can be solved once and for all by the control experts and other problems by experts in their respective technology fields.


Details here......


Credit Cards Accepted
Thomas Supplier


Proton Impian - Starting Problems
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The problem

A Proton Impian was suffering from intermittent starting problems, and the vehicle randomly cut out. This caused the engine warning light to illuminate.

The first stage of the investigation was to use a diagnostic tool and obtain any 'DTC' (Diagnostic Trouble Codes) information and relevant data from the ECU. However, when this was tried, there was no communication with the scan tool. At this point it was unknown whether the scan tool or the ECU of the vehicle was at fault.

The CAN test box was plugged into the vehicle's diagnostic port, and the CAN High and CAN Low pins illuminated, indicating power from the ECU to the diagnostic port. At this stage the scan tool was plugged into the CAN test box. Still there was no communication, no K-line activity. This implies a fault on the scan tool lead, or communication key. Further investigation revealed the scan tool lead had a dirty connection on the communication key.

The diagnosis

Once the connection of the communication key was cleaned, it was possible to extract the DTC codes from the vehicle:


The DTC was cleared, and all tools disconnected from the vehicle. A road test was performed. On return to the garage and with the engine still running the cam sensor was scoped, as you can see in the waveform below.

figure 1

The engine was then switched off, and would not re-start. The CAN test box and scan tool were connected to the vehicle via the diagnostic port, and the same DTC was extracted as before. The Camshaft sensor was then scoped, and the below waveform recorded.

figure 2

This revealed the Camshaft sensor was at fault.

The repair

The faulty Camshaft sensor was replaced. The DTC was cleared, the car was started, and the new cam sensor was scoped.

figure 3

A road test was then completed. On return to the garage the ECU was checked for DTCs and none were found.

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