Toyota Celica 2005 Repair Manual page 290

3 Check for open in harness or ECM.
ON
Engine Coolant
Temp. Sensor
2
1
THW
A09084
NG
Confirm good connection at ECM. If OK, re-
place ECM (See page SF−78).
2005 CELICA (RM1131U)
DIAGNOSTICS
PREPARATION:
(a)
(b)
ECM
HINT:
5V
Engine coolant temp. sensor connector is disconnected. Be-
14
THW
fore checking, do a visual and contact pressure checks for the
E4
18
ECM connector (See page IN−30).
E2
E4
E1
(c)
(d)
CHECK:
Read temperature value on the OBD II scan tool or
hand−held tester.
OK:
E2
A11408
− ENGINE (1ZZ−FE)
Remove the ECM cover.
Connect between terminals THW and E2 of the ECM con-
nector.
Turn the ignition switch ON.
When using hand−held tester, enter the following menus:
DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL /
COOLANT TEMP.
Temperature value: 140°C (284°F) or more
OK Repair or replace harness or connector.
289
DI−91