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DTC P0736 REVERSE INCORRECT RATIO

DTC P0736 REVERSE INCORRECT RATIO

DIAGNOSIS:

Vehicle speed sensor malfunction and torque converter turbine speed sensor malfunction, etc. or control valve malfunction.

TROUBLE SYMPTOM:


• Shift point is too high or too low.

• Excessive shift shock.

• Tight cornering condition is occurred.

• Gear is not shifted to reverse.

• Gear position is held by fail safe function.


CHECK THROTTLE POSITION SENSOR.

Connect the Vehicle Diagnostic Interface to data link connector.

Turn the ignition switch to ON.

Read the value of accelerator pedal position sensor.

Does the value of accelerator pedal position sensor change from 0% to 100% smoothly when throttle position sensor was operated from fully closing to fully opening?

Yes


No

Check throttle position sensor.


FRONT VEHICLE SPEED SENSOR.

Lift-up the vehicle and place rigid racks.

Start the engine.

Move the select lever “D” range and slowly increase vehicle speed.

Note

The speed difference between front and rear wheels may light ABS warning light, but this indicates no malfunction. When AT control diagnosis is finished, perform the ABS memory clearance procedure of on-board diagnostics system.


Does the vehicle speed displayed by Vehicle Diagnostic Interface almost correspond with vehicle speed indicated by combination meter?

Yes


No

Check the front vehicle speed sensor.


CHECK TORQUE CONVERTER TURBINE SPEED SENSOR.

Move the select lever to “P” or “N” range.

Idle the engine.

Does the turbine speed sensor revolution displayed by Vehicle Diagnostic Interface almost correspond with engine revolution indicated by tachometer?

Yes

There are malfunctions in TCM, TCM connector poor contact, or transmission assembly mechanical malfunction.


No

Check the torque converter turbine speed sensor circuit.