Functional Check

Chart C-8B - 4T60-E Transaxle Shift Solenoid (Using Transaxle Test Box J 38791, Available):

Transaxle Solenoids Wiring Circuit:

Circuit Description:

The 4T60-E transaxle uses two solenoids to control shifting: shift solenoid "A" and shift solenoid "B". Refer to table below for solenoid operating sequence.

The PCM monitors the TP sensor and vehicle speed vs. engine speed to determine the correct shift points.

If the transmission range switch position indicates manual low position, the PCM will keep both solenoids "A" and "B" energized until 5400 RPM at which point the PCM will force a shift by de-energizing solenoid "A". Manual 2nd and manual 3rd are controlled hydraulically within the transaxle.

Test Description: Number(s) below refer to circled number(s) on the diagnostic chart.
1. With key "ON"/engine "OFF," the PCM should be commanding 1st gear (both shift solenoid control circuits grounded.)
2. Ensures that the PCM can control the ground to shift solenoid "A" properly.
3. Ensures that the PCM can control the ground to shift solenoid "B".
4. Do not measure resistance until the ignition has been "OFF" for at least 10 seconds to ensure that the PCM has powered down completely.

Diagnostic Aids:

If the PCM, control circuitry, and shift solenoids are functioning properly and the transaxle still does not shift correctly, the problem may be hydraulic or mechanical. Refer to Transaxle section.

Shift Solenoid Operating Sequence

Shift Solenoid Operating Sequence: