Toyota Camry Manual page 1260

DTC P0115
CIRCUIT DESCRIPTION
A thermistor built into the engine coolant temp. sensor changes the resistance value according to the engine
coolant temp.
The structure of the sensor and connection to the ECM is the same as in the intake air temp. circuit malfunc-
tion shown on page DI–228.
If the ECM detects the DTC P0115, it operates fail–safe function in which the engine coolant temperature
is assumed to be 80°C (176°F).
DTC No.
P0115 Open or short in engine coolant temp. sensor circuit
HINT:
After confirming DTC P0115, use the OBD II scan tool or TOYOTA hand–held tester to confirm the engine
coolant temp. from CURRENT DATA.
Temperature Displayed
140°C (284°F) or more
WIRING DIAGRAM
Engine Coolant Temp. Sensor
INSPECTION PROCEDURE
HINT:
D
If DTCs P0110 (Intake Air Temp. Circuit Malfunction), P0115 (Engine Coolant Temp. Circuit Malfunc-
tion), P0120 (Throttle/Pedal/Position Sensor/Switch "A" Circuit Malfunction) and P1410 (EGR Valve
Position Sensor Circuit Malfunction) are output simultaneously, E2 (Sensor Ground) may be open.
D
Read freeze frame data using TOYOTA hand–held tester or OBD II scan tool. Because freeze frame
records the engine conditions when the malfunction is detected, when troubleshooting it is useful for
determining whether the vehicle was running or stopped, the engine warmed up or not, the air–fuel
ratio lean or rich, etc. at the time of the malfunction.
DIAGNOSTICS
Engine Coolant Temp. Circuit Malfunction
Detection Item
–40°C (–40°F)
2
1
– ENGINE (1MZ–FE)
D Open or short in engine coolant temp. sensor circuit
D Engine coolant temp. sensor
D ECM
14
G–B
E10
18
BR
E10
Author :
Trouble Area
Malfunction
Open circuit
Short circuit
ECM
5V
THW
E2
E1
Date :
DI–233
DI07I–06
FI6448
468