I replaced a new Denso TPMS today on my car LR.  I can scan all the TPMS.  When I was using a relearn procedure right after scanned all the TPMS, then I connected the OBC cable with the on position on the key ignition.  Nothing is happening.  Tried it few times and it is not writing to the ECU.  Bad unit?

 I wasn't getting the prompt to connect to the OBDII port after scanning all the sensors.  So, I got home and updated the firmware.  Tried this morning again, everything went smoothly.