ELECTRONIC COMPONENTS
Input Speed Sensor (G182)
Output Speed Sensor (G195)
The Input Speed Sensor (G182) is located in the
transaxle case below the valve body, as shown in
Figure 6, and retained with a bolt. The ISS has a
White connector that mounts on a bracket with a valve
body bolt and goes through the 8-way case connector,
also shown in Figure 6.
The ISS is triggered by the external lugs on the K-2
clutch housing to determine exact transaxle turbine
speed. The TCM uses this information to control line
pressure for garage shifts, control and monitor torque
converter lock-up clutch, monitor gear ratios and
diagnosis of shift components via the Dynamic Shift
Program (DSP), which is VW,s name for the shift
adapt feature in the TCM.
The ISS is based on the Hall Affect principle. The
signal is a square-wave signal whose frequency is
proportional to turbine shaft speed. Should the Input
Speed Sensor fail, the engine RPM sensor is used as a
back-up, no shift adapt operations, no controlled
TCC lock-up (apply and release only) and no pressure
control on garage shifts (N-D, N-R) harsh
engagement.
The Input Speed Sensor is shown in Figure 4.
The Output Speed Sensor (G195) is located in the
transaxle case below the valve body, as shown in
Figure 6, and retained with a bolt. The OSS has a Blue
connector that mounts on a bracket with a valve body
bolt and goes through the 8-way case connector, also
shown in Figure 6.
The OSS is triggered by the external lugs on the
Parking Gear to determine exact transaxle output
shaft speed. The TCM uses this information to
determine shift points, control and monitor torque
converter lock-up clutch, monitor gear ratios and
diagnosis of shift components via the Dynamic Shift
Program (DSP), which is VW,s name for the shift
adapt feature in the TCM.
The OSS is based on the Hall Affect principle. The
signal is a square-wave signal whose frequency is
proportional to output shaft speed. Should the Output
Speed Sensor fail, the speed signal from the ABS
Control Module is used as back-up, with limited shift
adapt capability.
The Output Speed Sensor is shown in Figure 5.
Special Note:
The ISS and OSS are Hall Affect Sensors and
should be checked using a scope under operating
conditions. The resistance values provided in the
Figures below are from new sensors. Resistance
checks on these type of sensors would, at best,
inform you of either open or grounded circuits
within the sensor itself.
INPUT SPEED SENSOR
OUTPUT SPEED SENSOR
5.0M Ohms Resistance
at room temperature
5.0M Ohms Resistance
at room temperature
Figure 4
Figure 5
6
Technical Service Information