P1602

DTC P1602 Serial Communication Problem with TCM (Time out)

DESCRIPTION
A communication line exists between the Engine Control Module (ECM) and the Transmission Control Module (TCM). The sole purpose of this communication line is for the TCM to notify the ECM to activate the Malfunction Indicator Lamp (MIL) when a serious transmission failure has occurred.

DTC Detecting Condition:

Schematic Diagram:

Step 1 - 3:

Step 4 - 5:

INSPECTION PROCEDURE