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Home >> Lexus >> 2008 >> IS 350 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2GR-FSE) - DTC P0010 - P0159 >> DTC P0116 Engine Coolant Temperature Circuit Range / Performance Problem >> Typical Enabling Conditions
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Typical Enabling Conditions

ECT sensor cold start monitor: 

TYPICAL ENABLING CONDITIONS

Monitor runs whenever following DTCs are not present P0100 - P0103: MAF meter
Battery voltage 10.5 V or more
Time after engine start 1 second or more
ECT at engine start Less than 60°C (140°F)
IAT sensor circuit OK
Soak time 0 seconds or more
Accumulated MAF 1290.65 g or more
Engine Running
Fuel cut OFF
Difference between ECT at engine start and IAT Less than 40°C (72°F)

ECT sensor soak monitor: 

TYPICAL ENABLING CONDITIONS

Monitor runs whenever following DTCs not present P0100 - P0103: MAF meter
Battery voltage 10.5 V or more
Engine Running
Soak time 5 hours or more
ECT at engine start 60°C (140°F) or higher
Accumulated MAF 3641.5 g or more