Programming and Relearning

A750F AUTOMATIC TRANSMISSION SYSTEM: INITIALIZATION

INITIALIZATION

1. RESET MEMORY

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

NOTE: Techstream only

HINT: The ECM stores the condition 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 new information. Reset procedure is as follows.

(a) Turn the ignition switch OFF.
(b) Connect Techstream to the DLC3.
(c) Turn the ignition switch ON, and turn the tester main switch ON.
(d) Enter the following menus: Powertrain / Engine and ECT / Utility / Reset Memory.

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

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

2. SET UP FUNCTION OF ATF TEMPERATURE WARNING LIGHT (ONLY 4WD VEHICLE)

CAUTION: Re-set 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 4 wheel drive control switch to the 4WD position. Check that the 4WD indicator illuminates.

- (c) Shift the 4 wheel drive control switch to the 2WD position.

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

NOTE: 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.