A communication line exists between the Engine Control Module(PCM) and the Transaxle Control Module(TCM). The communication is through a Control Area Network(CAN). Without CAN communication, an independent pin and wiring is needed to receive a sensor information from a PCM. The more information to be communicated, the more wirings is required. In case of CAN communication type, all the information need to be communicated among control modules such as PCM and ABS control module use CAN lines.
The PCM determines CAN communication error and sets DTC U0101 if no message received from TCM.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
No message from TCM | 1. Poor connection or damaged harness 2. Faulty PCM 3. Faulty TCM |
Enable Conditions |
•
Battery voltage > 10V
•
Engine speed > 32rpm
•
Delay time > 0.5 sec. | |
Threshold Value |
•
No message from TCM for 0.1 sec. | |
Diagnostic Time |
•
1.5 sec. | |
MIL On Condition |
•
2 Driving Cycles |
Fig.1) Normal waveform with ignition ON
