Valve Body Components

Valve Body Components

Valve body electrical components consist of:

- Pressure Regulator solenoids (EDS).







Controlled by a Pulse Width Modulated (PWM) control signal from the TCM provides an adjustable positioning of the valve. The variable position makes these valves suitable for varying control pressures.

Pressure Regulator valves are used for:
- Maintaining operating pressures
- Gradual TC Clutch lock up control
- Overlap shift control (system specific)
- Band Brake Activation (system specific)

- Magnetic Valve (Shift) Solenoids (MV).







Controlled by a switched (on/off) power or ground signal from the TCM. The valves have two positions open or closed. Some are normally open and close when activated and some are normally closed and open when activated.

MV solenoids are for:
- Controlling shift valve position
- ON/OFF control of TC lock up clutch
- Reverse Lock Out protection (early systems)
- Band Brake Activation (system specific)
- Shift lock control

- Input (Turbine) and output Speed Sensors.







Analog inductive sensors that produce an A/C sine wave similar to an ABS/ASC wheel speed sensor. The signal frequency is proportional to the rotation speed of the monitored component. The speed sensors are used to monitor clutch slip for plausibility and shift points as well as maintaining adaptive hydraulic pressures.

- Transmission Oil Temperature Sensor:







NTC resistor provides a variable voltage drop proportional to transmission oil temperature. For most systems, the NTC is soldered into the oil temp circuit of the wiring harness located in the transmission oil sump. The A5S 360R transmission contains a replaceable NTC plug in resistor probe that is clipped to a bracket and immersed in oil in the sump.

These components are monitored statically and dynamically by the TCM and will set specific fault codes if the sensor or it's circuit becomes impaired. However, the components and their circuits to the TCM can be simultaneously checked during diagnosis. The following pages provide specific locations of the components within the transmissions.