Malfunction Indicator Lamp - A/T: Description and Operation

A/T CHECK WARNING LAMP (5-SPEED A/T MODELS)
The A/T CHECK warning lamp is controlled by the TCM (transmission control module). When an A/T system malfunction occurs, the TCM signals the combination meter (unified meter control unit) via the CAN lines and ground is provided to the A/T CHECK warning lamp.

When power and ground are supplied, the AT CHECK warning lamp illuminates.

A/T CHECK (POSITION) INDICATOR LAMP (4-SPEED A/T MODELS)
The A/T check (position) indicator lamp is controlled by the TCM (transmission control module). When an A/T system malfunction occurs, the TCM signals the combination meter (unified meter control unit) via the CAN lines and ground is provided to the A/T check (position) indicator lamp.

When power and ground are supplied, the A/T check (position) indicator lamp illuminates.