P3225high severityPowertrain
Motor/Generator Coolant Pump Control Circuit
on 2010 Toyota Highlander 3.3L V6 Hybrid · AWD
What this code means
The coolant pump that provides cooling to the motor/generator has a control circuit fault.
Symptoms
- Motor temperature rising
- Reduced motor power output
- Motor protection mode may activate
- Coolant pump not running
- Overtemperature warning
Common causes
- Coolant pump motor failure
- Pump control relay fault
- Wiring damage to pump
- Pump control module failure
- Fuse blown for pump circuit
Diagnostic steps
- Command coolant pump on via scan tool
- Check pump motor voltage supply
- Test pump relay operation
- Measure pump motor current draw
- Inspect pump wiring and fuse
Repair notes
Replace motor coolant pump or repair control circuit. Verify motor temperatures return to normal after repair.
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