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 TCM use CAN lines.
The PCM sets DTC P1602 if PCM detects that communication time via CAN exceeds threshold value.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● No message from control module | ● Open or short in CAN line ● Contact resistance in connectors |
Enable Conditions | ● Battery voltage >10V ● Engine speed > Approx. 30 rpm | |
Threshold Value | ● Time exceeded without message = 1 sec. | |
Diagnostic Time | ● 1 sec. |
