U0101
DTC U0101 Lost Communication with TCMDESCRIPTION
DTC Detection Condition:
The Transmission Control Module (TCM) and ECM perform 2-way communications with each other via the Controller Area Network (CAN). The TCM sends signals to the ECM concerning required engine rpm, required engine torques, warning indicators in the combination meter, DTCs and other data. The ECM sends signals to the TCM concerning engine rpm, opening angles of the throttle valve, temperature of intake air, temperature of engine coolant, engine torques and other data. If the TCM cannot communicate with the ECM, the TCM will conclude that there is a malfunction in the CAN system, illuminate the MIL and set a DTC.
Monitor Strategy:
Typical Enabling Conditions:
Typical Malfunction Thresholds:
Wiring Diagram:
INSPECTION PROCEDURE
Step 1-2:
Step 3-5:
Step 5(Continued):
