DTC 0804

A/T Diagnosis Communication Line (DTC: 0804)
DESCRIPTION
The malfunction information related to A/T (Automatic Transmission) is transferred through the line (circuit) from A/T control unit to ECM. Therefore, be sure to erase the malfunction information such as DTC not only in A/T control unit but also ECM after the A/T related repair.





DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE
Before performing the following procedure, confirm that battery voltage is more than 10.5V.

With Consult
1) Turn ignition switch "ON".
2) Select "DATA MONITOR" mode with CONSULT.
3) Start engine and let it idle for at least 40 seconds.

OR

With GST
1) Start engine and et it idle for at least 40 seconds.
2) Select "MODE 3" with GST.

OR

Without Scan Tools
1) Start engine and let it idle for at least 40 seconds.
2) Turn ignition switch "OFF", wait at least 5 seconds and then turn "ON".
3) Perform diagnostic test mode (self-diagnostic results) with ECM.




WIRING DIAGRAM




DIAGNOSTIC PROCEDURE