HEAD A 7W3806 - Caterpillar

25 is used in order to enable the air inlet heater in the power train ECM. Submode 25 is used in order to disable the air inlet heater in the power train ECM.
Use the 4C-8195 Control Service Tool to enter Transmission Calibration Mode (8) via the "MODE" switch. Then enter submode 25 by using the "SCROLL" switch.
Use the INCREMENT (+) position of the "CLEAR" switch in order to change the selection. Press and release the switch in order to select AH0 or AH1. AH0 disables the air inlet heater in the power train ECM. AH1 enables the air inlet heater in the power train ECM.
To exit submode 25, scroll to the next submode by using the "SCROLL" switch or exit the Transmission Calibration Mode by using the "MODE" switch.