Toyota 1 MZ–FE Manual page 462

EG2–462
DTC P0116 Engine Coolant Temp Circuit Range Performance
Problem
CIRCUIT DESCRIPTION
Refer to engine coolant temp. circuit malfunction on page EG2–457.
DTC No. Diagnostic Trouble Code Detecting Condition
20 min. or more after starting engine, engine
coolant temp. sensor value is 30_C (86_F) or less.
P0116
(2 trip detection logic)
DIAGNOSTIC CHART
HINT: If diagnostic trouble codes "P0115" (engine coolant temp. circuit malfunction) and "P0116"
(engine coolant temp. circuit range/ performance) are output simultaneously, engine coolant
temp. sensor circuit may be open.
Perform troubleshooting of diagnostic trouble code P0115 first.
Are there any other codes (besides DTC P0116)
1
being output?
Replace engine coolant temp. sensor. (See page EG2–282)
1MZ–FE ENGINE – CIRCUIT INSPECTION
Engine coolant temp. sensor.
Cooling system.
YES
Trouble Area
Go to relevant diagnostic trouble code
chart.