Description:

Error code ECU 000647.06 is triggered when the ECU detects that the current at the proportional solenoid valve for the charge air cooler hydraulic motor is too high, indicating a grounded circuit. This affects the fan speed increase circuit.

Reaction:

The ECU may limit or disable the park lock function to prevent damage or malfunction due to the high current.

Recommendations:

• Inspect for Grounded Circuits: Check the wiring and connectors for the proportional solenoid valve for signs of grounding or short circuits.
• Measure Circuit Resistance: Use diagnostic tools to measure the resistance in the circuit and locate the short.
• Repair or Replace Damaged Components: Address any identified grounding issues by repairing or replacing faulty wiring or connectors.
• Test Solenoid Valve After Repair: Ensure the solenoid valve operates correctly after repairs, and the current is within the specified range.
• Reset ECU and Verify System: Reset the ECU and perform tests to ensure the solenoid valve functions correctly and no further errors are detected.

Note:

Proper electrical insulation and wiring maintenance are crucial to prevent short circuits and ensure reliable operation of the charge air cooler hydraulic motor.