New Kvaser white paper discusses ways to maximise CAN’s efficiency in next generation vehiclesâ€¨
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.
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.....
Automotive Scope Users
Pico Automotive Scope software now sports a new Waveform Library browser. Must own PicoScope to view. See details here
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 leads 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 vehicleá¾¿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
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.
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