Solenoid Assembly

NOTE: Solenoid assembly may be referred to as the solenoid pack. Transaxle control relay may be referred to as "transmission control relay" or "trans. system relay".

Solenoid assembly is controlled by the TCM. The TCM provides voltage to transaxle control relay, causing contacts to close, supplying voltage to solenoid assembly. Solenoid assembly, consisting of 4 electric solenoids, controls transaxle hydraulic circuits. The TCM completes the ground circuit, operating solenoid for proper hydraulic circuit control.

Low-reverse (L-R), overdrive (OD) and 2-4 pressure switches are located in the solenoid assembly. Pressure switches are monitored by the TCM to indicate whether pressure exists in a specified hydraulic circuit. Pressure switches must operate in correct status in each gear. See PRESSURE SWITCH OPERATION table. The TCM uses this information to verify solenoid assembly operation and to determine what gear transaxle is in.

PRESSURE SWITCH OPERATION

Gear & Pressure Switch		Switch Statues
Park
L-R		Closed
2-4		Open
OD		Open
Reverse
L-R		Open
2-4		Open
OD		Open
Neutral
L-R		Closed
2-4		Open
OD		Open
1st Gear
L-R		Closed
2-4		Open
OD		Open
2nd Gear
L-R		Open
2-4		Closed
OD		Open
3rd Gear
L-R		Open
2-4		Open
OD		Closed
4th Gear
L-R		Open
2-4		Closed
OD		Closed