Transaxle Control Module (TCM)

NOTE: TCM is not able to read DTCs nor PIDs for confirming normal communication between ABS/TCS HU/CM and instrument cluster. Therefore use WDS or equivalent scan tool to read PIDs from the ABS/TCS HU/CM and instrument cluster in order to confirm normal communication between the two modules.

Check display of DTC U0100, using scan tool. See Figure.
Referring to TCM Malfunction Locator Table, determine malfunctioning part of CAN system. See Figure and Fig 1 .

Fig 1: TCM Malfunction Locator Table

Courtesy of MAZDA MOTORS CORP.