Description

Sensor reference voltage not available

Effects on the driving operation

Hard shifts

Driving in reverse gear is not possible or restricted.

If the output sensor is also defective, only limp-home mode available

No torque limitation relative to the engine speed

Engine torque reduction is limited.

The characteristic curve of the auxiliaries is not considered.

The engine speed and values derived from it are incorrectly set in the CAN communication.

Possible causes

The sensor reference voltage could not be determined.

The fault is located inside the control unit.

Place of action

Engine speed sensor

(Sensor voltage)

Transmission control unit

Instruction

Measure voltage at the speed sensor.

Replace the control unit and contact the VOITH customer service if the problem reoccurs.

Setting conditions of the event

No description available.

Test conditions of the event

No description available.

Final function check

If the defective component cannot be clearly identified, you should try to reproduce the fault:

• Reinstall the component in the vehicle.
• Test the function.

After the fault has been eliminated, the following steps have to be carried out:

• Conduct a test drive with function check.
• Read out the fault memory.
• Check the transmission for leaks.
• Perform a final visual inspection.

These steps are necessary to ensure the entire vehicle functions.

See also:

		Aftersales service index