transmission fluid CHEVROLET AVEO 2002 Service Service Manual

Fig. 454: Lock-Up Solenoid
Courtesy of GENERAL MOTORS CORP.
Pressure Control Solenoid (PCS)
The PCS (1) is located inside the valve body and regulates the transmission's fluid pressure system. It is
internally grounded in the TCM and operates when it is supplied with battery voltage from the TCM, through
the PCS and back to the TCM.
The battery voltage is controlled by a varying current from the TCM.
The strength of the current is a function of the throttle position.

2006 Chevrolet Aveo
2006 TRANSMISSION Automatic Transaxle - Aisin (81-40LE) - Introduction (2 Of 2) - Aveo
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Fig. 455: Pressure Control Solenoid (PCS)
Courtesy of GENERAL MOTORS CORP.
Transmission Fluid Temperature (TFT) Sensor
The TFT sensor (1) provides the TCM with information on the transmission fluid temperature.
The TCM uses information from the TFT sensor to calculate the gear shift points and to engage the torque
converter loc
k-up function.

2006 Chevrolet Aveo
2006 TRANSMISSION Automatic Transaxle - Aisin (81-40LE) - Introduction (2 Of 2) - Aveo
Microsoft
Thursday, July 16, 2009 1:17:34 PMPage 476 © 2005 Mitchell Repair Information Company, LLC.

Fig. 456: Transmission Fluid Temperature (TFT) Sensor
Courtesy of GENERAL MOTORS CORP.
Input Shaft Speed (ISS) Sensor
The ISS sensor (1) is located on the upper position of the transaxle and detects A/T input speed from the
rotation number of the direct clutch drum. They transmit to TCM as a signal.

2006 Chevrolet Aveo
2006 TRANSMISSION Automatic Transaxle - Aisin (81-40LE) - Introduction (2 Of 2) - Aveo
Microsoft
Thursday, July 16, 2009 1:17:34 PMPage 477 © 2005 Mitchell Repair Information Company, LLC.