Land Cruiser URJ200 URJ202 GRJ200 VDJ200 AB60F AUTOMATIC TRANSMISSION / TRANSAXLE

Land Cruiser URJ200 URJ202 GRJ200 VDJ200 AB60F AUTOMATIC TRANSMISSION / TRANSAXLE

The four wheel drive control ECU judges whether the transfer is in L4 based on the information from the limit switch inside the transfer shift actuator assembly which is detected by the ECM. The four wheel drive control ECU inputs a signal to the combination meter assembly via CAN communication and turns on the 4LO indicator when the transfer is in L4.

When 2nd mode is selected with the pattern select (2nd) switch, the ECM controls the shift solenoid valves and the transmission starts from 2nd gear.

The 2nd mode is the system that operates the throttle motor to control engine output to reduce skidding of the driving wheels, and guarantee takeoff acceleration, driving straightness and turning stability.

The ECM memory contains the programs for the normal and power shift patterns and lock-up pattern.

By following the programs corresponding to the signals from the pattern select switch, the park/neutral position switch and other various sensors, the ECM switches the shift solenoid valves on and off, and controls the transmission gear change and the lock-up clutch operation.

When moving the shift lever to S using the transmission control switch, it is possible to switch the shift range among "1" (1st range) and "6" (6th range).

Shifting to "+" once raises the shift range by one, and shifting to "-" lowers the shift range by one.

The amount of current flow to the solenoid is controlled by the ECM. During the lock-up operation, if the current increases, the lock-up hydraulic pressure increases.

The 1-2 shift valve performs shifting to 1st gear and other gears. When shifting to 2nd and 4th gears is impossible, or when the ECM directs the gearshift to switch to 5th and 6th gear and the engine overruns (clutch slips), this DTC is output.

The Automatic Transmission Fluid (ATF) temperature sensor is on the transmission, just in front of the oil cooler inlet pipeline.

If the ECM detects an abnormally high ATF temperature near this sensor, it illuminates the warning light.

Shifting from 1st to 5th is performed in combination with the ON and OFF operation of the shift solenoid valves SL1, SL2, S1, S2, S3, S4 and SR, which are controlled by the ECM. If an open or short circuit occurs in the shift solenoid valves, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be operated safely ().