Description:

This error code, PTR 000190.18, is generated by the Power Train Reverser (PTR) control unit when it detects that the engine speed signal drops below 400 rpm for more than 2 seconds during a shift. This can occur due to a malfunctioning engine speed sensor, wiring issues, or problems within the engine control system.

Reaction:

When this error is detected, the PTR control unit may interrupt the shifting process to prevent potential damage to the transmission. The system may also display a warning message to the operator.

Recommendations:

Inspect Engine Speed Sensor:

• Check the engine speed sensor for proper operation.
• Ensure the sensor is not damaged, dirty, or misaligned. Replace if necessary.

Check Wiring and Connections:

• Inspect the wiring and connectors related to the engine speed sensor.
• Ensure all connections are secure and free from corrosion or damage.

Test Sensor Circuitry:

• Use a multimeter to test the engine speed sensor circuitry for proper functionality.
• Ensure there are no short circuits or open circuits causing the signal loss.

Examine Engine Control System:

• Verify that the engine control system is functioning correctly.
• Check for any diagnostic trouble codes in the engine control unit that might relate to engine speed issues.

Update Software:

• Ensure that the PTR control unit and engine control unit software are up-to-date.
• Apply any available software updates or patches from the manufacturer.

Monitor Engine Speed Signal:

• After addressing the issue, monitor the engine speed signal during operation.
• Ensure that the signal remains stable and does not drop below 400 rpm during shifts.

Note:

Accurate engine speed signals are critical for proper shifting and transmission performance. Regular maintenance of the engine speed sensor and related components can help prevent such issues.