Description:

This diagnostic trouble code (TCU 000191.03) is generated if the control unit detects that the voltage at the signal input from channel 1 of the transmission output speed sensor (B63, lead 6081) is too high. This indicates that the sensor’s circuit is open or shorted to a positive lead. If diagnostic trouble code TCU 524110.03 is also stored, it indicates a problem with the sensor supply voltage, which must be addressed first.

Reaction:

When this error code is detected, the equipment may experience incorrect transmission speed readings, leading to potential performance issues or protective mode activation.

Recommendations:

1. Address Related DTCs:

• Process TCU 524110.03 First: Resolve any issues related to the sensor supply voltage before addressing this code.

2. Inspect Sensor Circuit:

• Check for Open Circuit: Ensure that the sensor circuit is not open and that all connections are secure.
• Look for Shorts: Inspect the wiring for any signs of shorting to a positive lead.

3. Test the Sensor:

• Verify Voltage: Use a multimeter to check the voltage levels at channel 1 of the sensor input.
• Replace if Necessary: Replace the sensor if it is providing incorrect voltage readings.

4. Examine Wiring and Connectors:

• Inspect Wiring: Check all wiring and connectors associated with the sensor for damage or disconnection.
• Repair or Replace: Repair or replace any faulty wiring or connectors.

Note:

Regular inspection and maintenance of the transmission output speed sensor and its associated circuitry are essential to prevent high voltage issues. Ensure all components are in proper working condition.