1.15.18.1 Automatic Transmission

U1202 (CEGSmin), U0101 (CEGSsig), U1200 (CEGSnpl) 

The diagnosis of the powertrain CAN communication between the TCM and the PCM is done by supervision of the received TCM powertrain CAN messages.

If a TCM powertrain CAN message is missing for a calibrated period of time, a timeout is detected and a CEGSsig fault will be set.

If the checksum of a TCM powertrain CAN message is wrong for a calibrated period of time, a malfunction is detected and a CEGSnpl fault will be set.

If the sequence number of a TCM powertrain CAN message is wrong for a calibrated period of time, a malfunction is detected and a CEGSmin fault will be set.