Toyota T100 1996 Service Manual page 298

DI−34
INSPECTION PROCEDURE
HINT:
If DTCs P0110, P0115 and P0120 are output simultaneously, E2 (Sensor Ground) may be open.
1 Connect OBD II scan tool or TOYOTA hand−held tester and read value of engine
coolant temp.
PREPARATION:
(a) Connect the OBD II scan tool or TOYOTA hand−held tester to the DLC3.
(b) Turn the ignition switch ON and push the OBD II scan tool or TOYOTA hand−held tester main switch
ON.
CHECK:
Read temp. value on the OBD II scan tool or TOYOTA hand−held tester.
OK:
Same as actual engine coolant temp.
HINT:
If there is open circuit, OBD II scan tool or TOYOTA hand−held tester indicates − 40°C (− 40°F).
S
If there is open circuit, OBD II scan tool or TOYOTA hand−held tester indicates 140°C (284°F) or more.
S
OK
Check for intermittent problems (See page
DI−3).
2 Check for open in harness or ECM.
ON
Engine Coolant
Temp. Sensor
2
1
BE6653
P19555
NG
1996 TOYOTA T100 (RM449U)
DIAGNOSTICS
PREPARATION:
(a)
(b)
ECM
(c)
5 V
4 4
CHECK:
THW
E6 E6
Read temp. value on the OBD II scan tool or TOYOTA hand−
9 9
E2
E6 E6
held tester.
E1
(M/T)(A/T)
OK:
A00046
− ENGINE (3RZ−FE)
NG − 40°C (− 40°F) ... Go to step 2.
140°C (284°F) or more ... Go to step 4.
Disconnect the engine coolant temp. sensor connector.
Connect the sensor wire harness terminals together.
Turn the ignition switch ON.
Temp. value: 140°C (284°F) or more
OK Confirm good connection at sensor.
If OK, replace engine coolant temp. sensor.