Transmission Fluid Temperature Sensor Malfunction (ATF Temperature Sensor)
DTC
P0711
Transmission Fluid Temperature Sensor Circuit Range/Performance Problem
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. (2-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 kΩ
Open or short in ATF temperature sensor ATF temperature sensor ECM
P0711
Both (a) and (b) is detected. (a) After 12 seconds of the engine start, the temp. of the atmosphere and that of the engine coolant is more than -10°C. (b) After a normal driving for over 20 minutes and 6.2 miles (10 km), the ATF temp. is less than 10°C.
Open in ATF temp. sensor circuit ATF temp. sensor ECM
WIRING DIAGRAM
ECM
ATF Temperature Sensor O
6
O
1 E1
Y
10 E5
OIL
9 E6
E2
E1
BR
D07917
2002 ECHO (RM884U)
Author:
Date:
340
DI-171 DIAGNOSTICS
-
AUTOMATIC TRANSAXLE
INSPECTION PROCEDURE 1
Check ATF temperature sensor. 6
1 D02967
PREPARATION: Remove the solenoid wiring (See page AX-9 ). CHECK: Measure resistance between terminals of ATF temperature sensor at 25 °C (77 °F) and 110 °C (230 °F). OK: Resistance (Approx.): 25 °C (77 °F): 3.5 kΩ 110 °C (230 °F): 247 Ω NG
Replace the solenoid wiring.
OK
2
Check harness and connector between solenoid wiring and ECM (See page IN-29 ).
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