1A-4 HEATER AND VENTILATION
ON-VEHICLE SERVICE
SUPPLEMENTARY HEATER
REMOVAL
1) Remove heater unit referring to HEATER UNIT REMOVAL in
this section.
2) Detach clamp to separate heater unit upper and lower cases
from each other.
3) Remove upper case and remove supplementary heater (1) from
lower case (2).
INSPECTION
D Check that there is continuity between heater terminals. If there
are no continuity, replace supplementary heater.
D Check heater for crack or any other damage.
Replace as necessary.
INSTALLATION
Reverse removal procedure for installation nothing the following.
D When installing supplementary ceramic heater, be careful not to
keep in contact with wiring harness or other parts.
D Install heater unit referring to HEATER UNIT INSTALLATION in
this section.
SUPPLEMENTARY HEATER RELAY
INSPECTION
1) Disconnect negative (–) cable at battery.
2) Remove supplementary ceramic heater relay (1) from junction
box (2).
3) Check that there is no continuity between terminal “c” and “d”.
If there is continuity, replace relay.
4) Check that there is continuity between terminals “c” and “d”
when a 12 V battery is connected to terminals “a” and “b”.
If malfunction is found, replace it with a new one.
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