30
20
10
0.5
0.3
0.2
0.1
--20
20
40
60
80 100
F14741
(--4)
(104) (140) (176)
(32) (68)
(212)
A56276
Acceptable
(Figure 1)
Resist
ance
k
Ω
Temperature
_
C (
_
F)
05--80
--
DIAGNOSTICS
ECD SYSTEM (1ND--TV)
COROLLA Supplement (RM1129E)
DTC
P0182
FUEL TEMPERATURE SENSOR ”A”
CIRCUIT LOW INPUT
DTC
P0183
FUEL TEMPERATURE SENSOR ”A”
CIRCUIT HIGH INPUT
CIRCUIT DESCRIPTION
The fuel temperature sensor monitors the fuel temperature. A
thermistor built into the sensor changes the resistance value
according to the fuel temperature. The lower the fuel tempera-
ture is, the greater the thermistor resistance becomes, and the
higher the temperature is, the lower the resistance becomes
(see figure 1).
The fuel temperature sensor is connected to the ECM. The 5
V power source voltage in the ECM is applied to the fuel temper-
ature sensor from terminal THF via resistor R. Resistor R and
the fuel temperature sensor are connected in series. When the
resistance value of the fuel temperature sensor changes in ac-
cordance with the fuel temperature, the voltage at terminal THF
also changes. Based on this signal, the ECM corrects the pres-
sure control compensation of the supply pump and errors.
HINT:
When the fuel temperature sensor output is outside the normal range, the ECM determines this as a malfunc-
tion.
DTC No.
DTC Detection Condition
Trouble Area
P0182
Open or short in fuel temperature sensor circuit for 2.0 se-
conds
(The MIL is illuminated as well as a DTC being set immediately
malfunction is detected)
S
Open or short in fuel temperature sensor circuit
S
Fuel temperature sensor
S
ECM
P0183
Open or short in fuel temperature sensor circuit for 2.0 se-
conds
(The MIL is illuminated as well as a DTC being set immediately
malfunction is detected)
S
Open or short in fuel temperature sensor circuit
S
Fuel temperature sensor
S
ECM
HINT:
These DTCs are set when the engine idles for approximately 15 seconds.
05MRS--01
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TOYOTA COROLLA REPAIR MANUAL SUPP 1129E