Temperature Warning Indicator - A/T: Description and Operation
Indication of FailureWhen any on-board diagnostic item is malfunctioning, the display on the AT OIL TEMP indicator blinks immediately after the engine starts. The malfunctioning part or unit can be determined by a trouble code during on-board diagnostic operation. Problems which occurred previously can also be identified through the memory function. If the AT OIL TEMP indicator does not show a problem (although a problem is occurring), the problem can be determined by checking the performance characteristics of each sensor using the select monitor.
To display Transmission diagnostic trouble codes see Transmission Control Systems / System Diagnosis. Testing and Inspection
WARNING: Warning can be noticed only when the engine is initially started.
AT Oil Temperature light operation operates under the following conditions. Ignition switch on I engine off is the bulb check mode, light remains on. Normal - Ignition switch on I Engine on light remains on for 2 seconds from engine start.
NOTE: A FAILURE IS NEVER REPORTED VIA THE AT OIL TEMP LIGHT DURING CURRENT OPERATION. THE TCU WAITS UNTIL THE NEXT IGNITION CYCLE TO DISPLAY THE FOLLOWING AT OIL TEMP LIGHT CONDITION. THEREFORE THE DRIVER MAY DETECT AN ABNORMAL DRIVEABILITY CONDITION (FAIL-SAFE OPERATION) WITH NO AT OIL TEMP LIGHT INDICATING A FAILURE.
If the ATF temperature is too high the AT Temp light comes on and stays on until ATF temperature returns to normal.