Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition
Each time the ignition is switched on, the control module checks the memory circuit ROM. If the control module registers a fault in the memory circuit, the Diagnostic trouble code (DTC) AT-412 is stored the second time the ignition is switched on.

Substitute value
- None.

Possible source
- Fault in transmission control module (TCM).

Fault symptom[s]
- The combined instrument panel warning lamp flashes.

Note! The Motronic 4.4 engine control module (ECM) stores a diagnostic trouble code (DTC) when the transmission sends a malfunction indicator lamp (MIL) request. Erase this diagnostic trouble code (DTC) in the Motronic engine control module (ECM) when the transmission fault has been repaired.