Toyota Celica 2005, Repair Manual

Page: 995 / 2497

DI − 794
− DIAGNOSTICS AUTOMATIC TRANSAXLE (U341E)
2005 CELICA (RM1131U)
DTC P0710 Transmission Fluid Temperature Sensor ”A”
Circuit
CIRCUIT DESCRIPTION
The ATF temperature sensor converts fluid temperature into a resistance value which is input into the ECM.
DTC No. DTC Detecting Condition Trouble Area
P0710
Either (a) or (b) is detected for 0.5 sec. or more.
(1
− trip detection logic)
(a) Temperature sensor resistance is less than 79 Ω
(b) After the engine has been operating for 15 minutes or
more, the resistance at the temp. sensor is more than 156 k
Ω
S Open or short in ATF temp. sensor circuit
S ATF temp. sensor
S ECM
MONITOR DESCRIPTION
The automatic transmission fluid (ATF) temperature sensor converts ATF temperature to an electrical resis-
tance value. Based on the resistance, the ECM determines the ATF temperature, and the ECM detects an
open or short in the ATF temperature circuit. If the resistance value of the ATF temperature is less than 79
Ω
*1
or more than 156 k Ω
*2
, the ECM interprets this as a fault in the ATF sensor or wiring. The ECM will turn
on the MIL and store the DTC.
*1: 150
_ C (302 _ F) or more is indicated regardless of the actual ATF temperature.
*2: − 40 _ C ( − 40 _ F) is indicated regardless of the actual ATF temperature.
HINT:
The ATF temperature can be checked on the OBD II scan tool or hand
− held tester display.
MONITOR STRATEGY
Related DTCs P0710
ATF temperature sensor/Range check (Chattering)
ATF temperature sensor/Range check (Low resistance)
ATF temperature sensor/Range check (High resistance)
Required sensors/Components ATF temperature sensor (TFT sensor)
Frequency of operation Continuous
Duration 0.5 sec.
MIL operation Immediate
Sequence of operation None
TYPICAL ENABLING CONDITIONS
Item
Specification
Minimum Maximum
The monitor will run whenever this DTC is
not present.
See page DI − 758
Range check (Chattering, Low resistance)
The typical enabling condition is not avail-
able.
− −
Range check (High resistance)
Time after engine start 15 min. or more −
DI3RU − 13
994