ENGINE COOLANT TEMPERATURE (ECT)
METER AND SENSOR UNIT
ENGINE COOLANT TEMPERATURE (ECT) METER
INSPECTION
1) Disconnect Y/W lead wire going to ECT sensor.
2) Turn ignition switch ON, and check that ECT meter indicates
COOL.
3) Turn ignition switch OFF.
4) Ground Y/W lead wire through a 3.4 W test bulb (1) as illus-
trated.
5) Turn ignition switch ON, and check that bulb light up and pointer
(2) moves to hot side.
6) If ECT meter shows no operation, repair or replace defective
parts.
ENGINE COOLANT TEMPERATURE (ECT) SENSOR
FOR METER
REMOVAL AND INSTALLATION
Refer to ENGINE COOLANT TEMPERATURE SENSOR in sec-
tion 6E1.
WARNING:
Make sure that engine coolant temperature is cold be-
fore removing any part of cooling system.
Also be sure to disconnect negative cable from battery
terminal before removing any part.
1. ECT sensor
INSPECTION
Warm up ECT sensor (1) observing resistance between sensor ter-
minal (2) and sensor unit (1). Resistance should be decreased with
increase of its temperature.
8-14
BODY ELECTRICAL SYSTEM
Temperature
Resistance
50
C (122
F)
136 - 216
120
C (248
F)
16.4 - 19.4