GM / Opel CAN bus gateway, HS (500kb) to SW (Single Wire CAN) 33.33 / 83.33 kb


Additional information

Operation: 


Gateway makes possible to connect SW-CAN (single wire CAN) units directly to diagnostic tester, scan tool or CAN bus logger without use of original wiring and drive authorization systems. In addition it is possible to send “bus wake-up” message to wake up bus from sleep state (don't miss this with “ignition ON” message!). Transparent mode, any message broadcasted in one CAN subnet is transferredto an other. No any gateway rules exist. This is one of very important advantages because original car gateway doesn't allow to pass all messages.


Good for reprogramming, logging and testing purposes.


Configuration:

  • Jumper 1: if shorted, “bus wake-up” message (ID=100) is transmitted to SW-CAN subnet each 200 ms to wake up SW-CAN nodes from sleep state. Jumper 2 must be shorted too.
  • Jumper 2: turns on “high voltage wake-up” if shorted
  • Jumper 3: removed: SW-CAN operates at 33.33 kB “normal mode”, shorted: SW-CAN operates at 83.33 kB, “high speed mode”

Speed change (jumper 3) becomes active at next power up, while settings affected by jumpers 1 and 2 – immediately (on the fly).


Indication:


Device has 3 status LED's – two of them indicate activity on each of subnets, 3rd one (red) indicates OWERFLOW. It can occur when stack (30 frames deep) is full. Possible reason:

  • too much messages on faster subnet and it isn't possible to retransmit them all to slower subnet
  • there are no any other nodes attached to subnet, no acknowledge (ACK – must be at least 2 nodes communicating with each other).

In addition it is possible to use line terminator for CAN HS, must use soldering iron and place a solder joint.


Power supply: up to 15v DC max, laboratory grade.


User manual: http://cartools.lv/Forum/ (registration on forum board is mandatory to see attachments).