XB20 - Continuous Code 581: Clear and Try to Regenerate Code

Continuous Memory Diagnostic Trouble Code (DTC) 581 indicates that when the cooling fan was activated, the Power-to-Cooling Fan circuit exceeded the normal current draw. This could be due to a hard fault or an intermittent condition.

Possible causes:
- Power-to-Cooling Fan circuit short to ground.
- Damaged cooling fan motor.
- Damaged VCRM.

- Clear continuous memory. Clearing Diagnostic Trouble Codes

- Start engine.

- Turn A/C "ON", wait 15 seconds.

- A/C "OFF".

- Engine "OFF".

- Rerun Key On Engine Off (KOEO) Self-Test. Quick Test Appendix (Detailed Testing Instructions)

- Is Continuous Memory DTC 581 present?

Yes -- DTC 581 is a hard fault. Go to XB21. XB21 - Check Cooling Fan Motor

No -- DTC 581 is intermittent. Go to XB24. XB24 - Check Power to Cooling Fan Circuit: Intermittent Ground