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Home >> Toyota >> 2004 >> Prius >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (SFI) - Diagnosis >> DTC P2601: Coolant Pump Control Circuit Range/Performance >> Typical Enabling Conditions

Typical Enabling Conditions

TYPICAL ENABLING CONDITION

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)