P1600

DTC P1600: Serial Communication Problem between ECM and TCM




Wiring Diagram

Circuit Description
The serial data line is pulled up to about 5 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.

Detecting Condition / Trouble Area:

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

NOTE: Check to make sure that the following conditions are satisfied when using this DTC Confirmation Procedure.
- Intake air temp.: -14 °C, 6.8 °F or higher
- Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more)

1. Connect scan tool to DLC with ignition switch 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.

Steps 1 - 2:

Steps 3 - 4:

DTC Troubleshooting