Toyota TERCEL 1985 Repair Manual page 150

EC-62
Ohmmeter
(Large)
Ohmmeter
/
00 0
CMH Relay
/ \
íl
(Large)
EMISSION CONTROL SYSTEMS - Auxiliary Systems
3.
IF NO PROBLEM IS FOUND WITH THIS INSPECTION, THE
SYSTEM IS OKAY; OTHERWISE INSPECT EACH PART
ÉC4202
INSPECTION OF CMH
MEASURE RESISTANCE
INSPECTION OF CMH RELAY
Ohmmeter
1.
EC4204
2.
(Small)
INSPECTION OF THERMO SWITCH
(See page EC-11)
CHECK CMH WITH W A R M ENGINE
(a) Warm up the engine to above 55°C (131°F).
(b) Check that there is no voltage.
(a) Unplug the wiring connector.
(b) Using an ohmmeter, measure the resistance between
the termináis.
Resistance: 0.5 - 2.0 fí (20°C, 68°F)
(c) Plug in the wiring connector.
INSPECT RELAY CONTINUITY
Check that there is continuity between termináis 1 and 2.
Check that there is no continuity between termináis 3 and
4.
Relay location: Right fender apron
INSPECT RELAY OPERATION
Check the continuity between termináis 3 and 4 with bat-
tery voltage applied between termináis 1 and 2.