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Home >> Lexus >> 2008 >> LX 570 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTC P0010 - P0125 >> 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 not stored P0102 - P0103: Mass Air Flow (MAF) meter
P0110 - P0113: Intake Air Temperature (IAT) sensor
Battery voltage 10.5 V or higher
Time after engine start 1 second or more
ECT at engine start Below 60°C (140°F)
IAT sensor circuit OK
Soak time 0 seconds or more
Accumulated MAF 1,968 g or more
Fuel cut OFF
Difference between ECT at engine start and IAT Below 40°C (72°F)

ECT sensor soak monitor: 

TYPICAL ENABLING CONDITIONS

Monitor runs whenever following DTCs not stored P0102 - P0103: MAF meter
Battery voltage 10.5 V or higher
Engine Running
Soak time 5 hours or more
Either (a) or (b) condition met -
(a) ECT 60°C (140°F) or higher
(b) Accumulated MAF 4,165 g or more