Toyota Celica Supra 1986 Service And Repair Manual page 579

BODY ELECTRICAL SYSTEM- Instruments and Sender Gauges BE-31
Watt' Temperature Gauge
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2. INSPECT LEVEL WARNING SWITCH OPERATION
(a} Apply battery voltage between terminals 1 and 3
through a 3 .4W bulb. Check that the bulb lights.
(b) Submerge the switch in gasoline or water.
Check that the bulb goes out.
If
operation is not as specified, replace the sender gauge.
Water Temperature Gauge
INSPECTION OF WATER TEMPERATURE GAUGE
1. INSPECT RECEIVER GAUGE OPERATION
2.
3.
(a) Disconnect the connector from the sender gauge.
Ground the tenminal through a
3.4W
bulb
as
shown.
(b) Tum the ignition switch on. Check that the bulb lights
up and that the receiver gauge needle rises to the
upper position.
If indications are not as specified, remove and test the
receiver gauge.
MEASURE RESISTANCE OF RECEIVER GAUGE
Using an ohmmeter, measure the resistance between termi·
nals.
If each resistance value is not as shown in the table below,
replace the receiver gauge.
Between terminals
Resistance
(!1)
IG - U
Approx. 56
u-e
Api)(OX. 201.8
IG- E
Apl)(ox. 145.8
MEASURE RESISTANCE OF SENDER GAUGE
Using an ohmmeter. measure the resistance between the
terminal and ground.
If each resistance value is not as shown in the table below,
replace the sender gauge.
Wateftemptrature °C (°F)
Resinanot
(!1)
50 (1221
226.0
~~~:~
115 1 2391
284 +1.7 1
. - 2.21