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transaxle output shaft. The frequency of the
square-wave signal increases with the speed of
the transmission output shaft.
The OSS sensor picks up the speed at the gear of
the parking lock.
The TCM uses the information from the OSS
sensor for the following parameters:
• Calculation of the degree of torque reductionthat needs to be requested by the PCM during
shifting.
• Calculation of the shift points.
• Calculation of the engaging and disengaging point for the TCC (lock-up function).
• Calculation of the current gear ratios by comparison of the TSS sensor signal.
Consequences of signal failure
E125800
1 2
2
1
Description
Item
The OSS sensor
1
TCM connector 'B'
2 • The torque converter lockup and adaptation
functions are deactivated.
• The wheel speed signal is transmitted by the ABS to the TCM via the HS-CAN data bus. This
signal serves as a substitute value.
• When the engine is restarted (ignition switched off for approx. 15 seconds), the transaxle is no
longer in limp home mode. There is no longer
a fault indication on the instrument cluster, and
the MIL is off. However, the fault remains stored
in the TCM. If the fault is still present, limp home
mode is reactivated.
The TFT sensor
E125802
The TFT sensor is located in the valve body and
is an integral component of the internal transaxle
wiring harness.
Function
G1163605en2008.50 Kuga8/2011
307-01- 58
Automatic Transmission/Transaxle
— Vehicles With:
5-Speed Automatic Transaxle - AW55 AWD
307-01- 58
DESCRIPTION AND OPERATION
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FORD KUGA 2011.0MY WORKSHOP REPAIR MANUAL