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Circuit Description

WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.

Shift solenoid #1 and shift solenoid #2 are used together to electronically control the shifting of the transaxle from 1st gear to 4th gear/overdrive. The powertrain control module (PCM) outputs system voltage to turn ON/energize or remove voltage to turn OFF/de-energize either solenoid when it deems necessary. The transaxle shifts with the combination of both solenoids being turned ON and OFF. Shift solenoid #1 is normally ON in 1st and 2nd gears and never ON in 3rd or 4th gears. Shift solenoid #2 is normally ON in 2nd and 3rd gears and never ON in 1st or 4th gears. 4th gear/overdrive is obtained when both shift solenoids are OFF.

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