Programming and Relearning

A750F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: INITIALIZATION

1. RESET MEMORY

CAUTION:
Perform the Reset Memory (AT initialization) when replacing the automatic transmission assembly, engine assembly or ECM.

NOTICE:
Techstream only

HINT
The ECM stores the conditions under which the ECT (Electronic Controlled Automatic Transmission) controls the automatic transmission and engine assemblies according to their characteristics. Therefore, when the automatic transmission assembly, engine assembly, or ECM has been replaced, it is necessary to reset the memory so that the ECM can store the new information. Reset procedure is as follows.

(a) Turn the ignition switch off.

(b) Connect a Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

(e) Perform the Reset Memory procedure from the main menu.

(f) Enter the following menus: Powertrain / Engine and ECT / Utility / Reset Memory. Then, press "Next".

CAUTION:
After performing the Reset Memory, be sure to perform the Road Test Road Test described earlier.

HINT
The ECM stores the new information during the ROAD TEST.

2. SET UP FUNCTION OF ATF TEMPERATURE WARNING LIGHT

CAUTION:
Reset the function of the ATF (Automatic Transmission Fluid) temperature warning light, if the ECM has been replaced or Reset Memory (AT initialization) has been performed.

HINT
* The ATF temperature warning light is built into the 4WD vehicles. When the ATF temperature is too high, the ATF temperature warning light illuminates to warn the driver. If the ECM has been replaced or Reset Memory has been performed, this function does not work unless the following procedure is performed.
* Once the ECM is set up, its memory will not be cleared by only disconnecting the negative cable from the battery.

* (a) Start the engine.

* (b) Shift the transfer high and low shift lever to the 4WD position. Check that the 4WD indicator illuminates.

* (c) Shift the transfer high and low shift lever to the 2WD position.

* (d) Drive the vehicle at a vehicle speed of 40 km/h (25 mph) or more.

NOTICE:
If the battery is disconnected before driving the vehicle at a vehicle speed of 40 km/h (25 mph) or more, the memory will be cleared. If the battery has been disconnected, perform steps (a) to (d) again.