AT OIL TEMP Warning Light Display: Operation

The AT OIL TEMP light illuminates or blinks, when the ATF temperature is high and malfunction occurs in CVT.

When normal

AT OIL TEMP light always illuminates when the ignition switch is ON (engine OFF). Light goes off after two seconds from engine ON.

When ATF temperature is high

AT OIL TEMP light illuminates when the ATF temperature is abnormally high with engine ON.

When malfunction is detected

AT OIL TEMP light blinks at 2 Hz when the TCM detects the malfunction of CVT with engine ON. In this case, inspect using "Diagnostic Procedure with Diagnostic Trouble Code (DTC)". Ref. to DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) .

When AT learning is not finished

AT OIL TEMP light repeats "Blinking at 4 Hz → Turning OFF" every two seconds, when the AT learning is not finished with engine ON. In this case, perform the "Learning". (During AT learning, the light blinks at 2 Hz or illuminates.) Ref. to LEARNING CONTROL .

Fig 1: AT Oil Temp Warning Light Blinking Pattern

Courtesy of SUBARU OF AMERICA, INC.

IF the AT OIL TEMP light does not illuminate, or illumination patterns are not as above, check the AT OIL TEMP light circuit. Ref. to INSPECTION , AT OIL TEMP Warning Light Display.