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Home >> Toyota >> 2005 >> Prius >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (SFI) - Diagnostics >> DTC P2601: Coolant Pump Control Circuit Range/Performance >> Typical Enabling Conditions
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Typical Enabling Conditions

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not present See LIST OF DISABLE A MONITOR 
Coolant heat storage system malfunction Not detected
CHS water pump operation time 3 seconds or more
Variation in CHS tank outlet temperature and engine coolant temperature before and after preheating 2°C (3.6°F) or less
Storage coolant temperature More than 75°C (167°F)
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