Transmission Overview
The AX4N is similar to the AXODE, with one major exception: The AX4N uses a clutch stack and a roller clutch instead of an intermediate band, eliminating the need to release the band to shift into third gear. The solenoids receive power whenever the key is on; the computer supplies ground to energize the solenoids.

Terminal Identification
Here’s a breakdown of the individual connector terminals:

Shown from the terminal side of the transmission connector.

Electronic Pressure Control
To check the electronic pressure control signal, connect your high-impedance voltmeter or signal monitor to the terminals shown.

Checking the Shift Pattern
Here’s how to connect your signal monitor to check the transmission shift signals:

And here’s the signal pattern you should see:

Forcing the Shift
Here’s the manual shift pattern you can expect with the transaxle in failsafe:

And here’s how to force the AX4N to shift electrically:

First Gear
In first gear, only solenoid 2 receives ground.

Second Gear
To shift into second gear, the computer releases ground from solenoid 2; none of the solenoids receives ground.

Third Gear
To shift into third gear, the computer grounds solenoids 1 and 3; solenoid 2 remains open.

Fourth Gear
To shift into fourth gear, the computer grounds all three shift solenoids; the gray lines are the connections necessary to apply the converter clutch.

Never leave the TCC applied for more than a few seconds. Any longer could burn out the solenoid.

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