Have progressed with the wiring on a Cobra Coupe to the point I have a Motec PDM 30 connected to sufficient points to be able to run the engine and instruments.
The PDM is connected to a 15 button key pad on a single CAN bus which is a continuous wirng loom that is less than 2m in total length.
Ive completed an initial PDM configuration file, spliced in a 5 pin female CAN to USB connector (part #61059) adjacent the key pad plug and updated the PDM manager software from V1.7 as supplied with the parts, to V1.8.
I initially downloaded the latest USB driver from the motec web site then a 64 bit driver for Windows after being unable to get a software connection to the Keypad or have the PDM Manager recognize there was a PDM on the CAN bus.
Pins 25 / 26 at the PDM (CAN low / high are reading 1.9V - low and 3.1 V respectively). Power is currently run to the UTC fly lead and the CAN bus directly from the battery and pin 22 (at the PDM) has been connected to Ground. Both 12V suply and continuity to ground test ok.
After installing a 100R resistor about 1cm from the PDM connector across the CAN H/L lines I am able to connect to the keypad and download the configuration, but the PDM is 'not found' at any stage.
In entering the 10 digit serial number on the PDM without the ''-'', the software converts it to a new 5 digit number. Unsure whether the first or last five digits or all 10 in the serial number should be used..?
Look forward to your advice on diagnosis or tracing of potential faults.
With thanks
Chris