Toyota T100 1996 Service Manual page 423

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−129).
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
CHECK:
4 20
THW
E6 E6
Read temp. value on the OBD II scan tool or TOYOTA
9 22
E2
E6 E6
hand−held tester.
E1
(A/T)
(M/T)
OK:
A00046
− ENGINE (5VZ−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.
DI−159