Hyundai Creta: Automatic Transaxle Control System / Output Speed Sensor

Description and operation

Description
Output speed sensor uses an electric current type hall sensor in which the current is changed by the magnetic variation.
Output speed sensor (A) and Input speed sensor are integrated and installed in the transaxle.

Functions
Measures the rate of rotation of the output shaft inside the transaxle and delivers the readings to the TCM.
The sensor provides critical input data that's used in feedback control, torque converter clutch control, gear setting control, line pressure control, clutch activation pressure control, and sensor fault analysis.

Specifications

Specifications
▷ Type: Hall Effect Sensor
Operation condition [°C(°F)]
(-40 ~ 150) -40 ~ 302
Output voltage (V)
High
1.18 ~ 1.68
Low
0.59 ~ 0.84

Schematic diagrams

Circuit Diagram

Repair procedures

Inspection
1.
Using the GDS, check the input / output speed sensor waveforms.
Turn the ignition key OFF
Connect the GDS to the Data Link Connector (DLC) on the lower crash pad.
Turn the ignition key ON and the engine ON.
Check the input / output speed sensor waveforms at high speed and low speed.
Fig 1) Input / Output speed sensor at low speed

Fig 2) Input / Output speed sensor at high speed

Removal
1.
Remove the valve body assembly.
(Refer to Valve body System - "Valve Body")
2.
Disconnect the input & output speed sensor connector (A) from the main wiring.
3.
Remove the input & output speed sensor (B) after removing the bolts (2ea).
Tightening torque :
9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

Installation
1.
To install, reverse the removal procedure.
2.
Check fluid level after filling the automatic transaxle with fluid.
(Refer to Hydraulic System - "Fluid")
Input Speed Sensor
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