EAT Description and Operation

ELECTRONIC AUTOMATIC TRANSMISSION (EAT)

Description

General

The automatic gearbox is a four speed unit with electronic control of gear selection, shift quality and torque converter lock-up. A gear position switch on the gearbox transmits gear selector position to the EAT ECU, which outputs appropriate signals to an electro-hydraulic valve block in the gearbox.

The EAT ECU is located under the LH front seat below the radio/cassette player power amplifier (if fitted). A mode switch on the gear selector panel allows the driver to change the mode of the ECU operation between manual and sport modes. Warning lamps in the instrument pack are operated by the ECU to indicate control mode and system status.

Operation

EAT Supply

Circuit supply

A feed from the battery positive terminal is connected on an R wire to the engine compartment fusebox where it passes through fusible link 8 and fuse 12.

The feed from fuse 12 is connected from the fusebox on a PY wire to the EAT ECU pin Col 93-26 and supplies a continuous battery feed to the ECU.

The feed from fusible link 8 is connected or an NW wire to the passenger compartment fusebox and from the fusebox to the ignition switch on an N wire.

Ignition Switch Supply

With the ignition switch in position lithe feed from fusible link 8 passes through the ignition switch to the passenger compartment fusebox on a Y wire, where it passes through fuses 24 and 25.

The feed from fuse 24 is connected from the fusebox to the EAT ECU pin C0193-54 on an LGO wire to inform the ECU that the ignition is on. The feed from fuse 25 is connected from the fusebox to the automatic transmission selector pin C0675-2 on a GY wire.