Automatic Transmission Shock Shifting

Model: Elantra	Year model:2008	Mileage:4900
Displacement: 1600 cc	Fuel: Gasoline	Automatic trans.
Group: Transaxle/Transsmision	System:Automatic Trans.

Subject: A/Transmission shock when gear lever shift to ( R ) & ( D

1) Condition :

1. A/Transmission shock when gear lever shift to ( R ) & ( D ).

2) cause:

1. Input sensor socket connector loosed,1,2,3. pin unconnected to input sensor.

3) Diagnosis:

A) Scan tool check.
= Diagnosis trouble code.

• P0717 Input sensor signal turbine

General Description:

=The input (turbine ) speed sensor outputs waveform signal according to the revolution of the input shaft , TCM determines the input shaft speed by calculating the frequency of the pulses. this value is mainly used to control the optimum fluid pressure during shifting.

• If this trouble code ( P0717 ) appeared automatically fail safe and locked into 3rd, 2nd gear.

*Harness inspection:

• Signal circuit Inspection

1. Ignition “ON” & Engine off
2. Disconnect the INPUT SPEED SENSOR connector.
3. Measure voltage between terminal 2 of the input speed sensor harness connector and chassis ground (Specification is Approx. 5v) it is good?

• Power Supply Circuit Inspection

1. Ignition ON & Engine off.
2. Disconnect the Input Speed sensor connector.
3. Measure voltage between terminal 3 of the Iput speed sensor harness connector to the chassis ground (approx. (B+)Good?

B) Check the Input speed sensor harness connector,indication of poor contact due to deformation of connector.

4) Repair Guide:

• Repair connector of Input Speed sensor.