Description:

This diagnostic trouble code (TCU 000190.19) is generated if the ECU does not register any engine speed and, as a result, cannot provide the CAN BUS with the necessary data. A transmitted replacement value generates this diagnostic trouble code in the TCU. In its active state, this fault also generates a diagnostic trouble code at the ECU, which takes priority.

Reaction:

When this error code is detected, the equipment may experience erratic behavior or reduced performance due to the lack of accurate engine speed data. The system might enter a protective mode to prevent potential damage, leading to limited operational capabilities or shutdown.

Recommendations:

1. Inspect CAN BUS Communication:

• Check Connections: Ensure that all CAN BUS connections between the ECU and TCU are secure and free of corrosion.
• Test Communication: Use diagnostic tools to verify that the CAN BUS communication is functioning correctly.

2. Verify Engine Speed Sensor:

• Check Sensor Operation: Ensure that the engine speed sensor is functioning properly and providing accurate readings.
• Replace if Necessary: Replace the sensor if it is found to be defective.

3. Examine ECU Functionality:

• Test ECU: Ensure that the ECU is functioning correctly and processing engine speed signals properly.
• Update Software: Update the ECU software if necessary.

4. Process Higher Priority Codes:

• Address ECU Codes: Process and resolve any diagnostic trouble codes at the ECU, as they take priority and may be contributing to this issue.

Note:

Regular maintenance and checks of the CAN BUS communication system and related sensors are essential for accurate performance. Ensure all components are in good working condition to maintain proper synchronization between the ECU and TCU.