Description:

This error code, EPC 000177.03, indicates that the control unit has detected a voltage that is too high at the signal input of the transmission oil temperature sensor (lead 6002). This typically means the temperature value is below 34°C (29°F), suggesting that the sensor’s circuit is either open or shorted to a positive lead.

Reaction:

When this error is detected, the control unit may not accurately monitor the transmission oil temperature, potentially leading to improper transmission operation and protection measures.

Recommendations:

Inspect Sensor Wiring:

• Check the wiring associated with the transmission oil temperature sensor (B60) for any signs of open circuits or shorts to a positive lead. Repair or replace any damaged wiring.

Test Sensor Functionality:

• Use diagnostic tools to test the transmission oil temperature sensor. Replace the sensor if it is found to be faulty.

Verify Connections:

• Ensure all connectors and terminals in the sensor circuit are secure and free of corrosion. Repair or replace any faulty connections.

Check for Voltage Anomalies:

• Measure the voltage at the signal input to confirm it is within the normal operating range. Investigate and resolve any anomalies.

Reset and Test System:

• After addressing the issues, reset the system and monitor the transmission oil temperature readings to ensure they are accurate.

Note:

Regular inspection and maintenance of sensor wiring and connections are important to ensure accurate temperature readings and proper transmission operation.