P1600

DTC P1600: Serial Communication Problem Between ECM and TCM

Wiring Diagram:

Wiring Diagram

Circuit Description
The serial data line is pulled up to about 12 V by ECM and TCM transmits information to ECM through it by controlling its grounding. TCM constantly sends information while ignition switch is ON as to whether judgement was made or not with respect to all detectable DTCs as well as whether or not abnormality exists after judgement.




DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure
1. Connect scan tool to DLC with ignition switch turned OFF.
2. Turn ON ignition switch and clear DTC using scan tool.
3. Start engine and run it at idle for 5 min. or more.
4. Check DTC and pending DTC.

Step 1 - 3:

Step 3 (Continued) - 6:

DTC Troubleshooting