Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Celica 1988-1989.1993-1994.2000 Approved Toyota Celica 1989 heater system
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HEATER SYSTEM
1988 Toyota Celica
1988 Heater Systems
Celica
DESCRIPTION
Heater assembly consists of heater core, control panel,
blower motor assembly, control cables (electric servo motors on button
controlled models) and air ducts. All components are located under
instrument panel. Blower motor operation is electrically controlled.
OPERATION
SYSTEM CONTROLS
Lever Controlled Models
Temperature and mode levers are cable connected to heater
coolant valve and air doors. All models have a fresh/recirc lever to
provide choice of outside air entry or inside air recirculation.
Button Controlled Models
Air vent, air mix and recirc/fresh electric servo motors
control all heater functions. Celica button models use an air mix
servo motor to control hot air.
BLOWER SWITCH
Switch controls speed of blower motor through resistor
assembly. Switch is operated by control lever or rotating knob (push
buttons on button controlled models).
HEATER RELAY
A heater (or main) relay is used in heater circuit to control
current flow through system. See WIRING DIAGRAMS at end of this
article for electrical circuit connections.
Relay for heater is located on right kick panel, beneath
emission control computer.
CIRCUIT BREAKER
Circuit breaker is used for electrical system protection. It
is identified by its round shape, with 2-prong connection. Circuit
breaker is located on main fuse/relay panel under center dash. Circuit
breaker can be reset (if tripped) by pushing a thin rod into hole on
flat end of circuit breaker. See WIRING DIAGRAMS at end of this
article.
ADJUSTMENTS
AIR INTAKE DOOR CABLE
Lever Controlled Models
Position door lever against stop in "FRESH" position. Attach
control cable with retaining clip and check operation of air intake
door.
MODE DOOR CABLE
Lever Type
Move mode door lever to "VENT" position. Attach cable and
hold in position with retaining clip.
AIR-MIX DOOR CABLE
Lever Controlled Models
Position air door lever to "COOL" position and attach control
cable. Hold in position with retaining clip.
HEATER COOLANT VALVE CABLE
Lever Controlled Models
Place coolant valve lever in "COOL" position. Hold lever in
this position, attach cable, pull slack from cable and attach
retaining clip. Make sure pin is located in lever hole.
TROUBLE SHOOTING
BLOWER DOES NOT WORK WHEN FAN IS ON
Check for the following conditions: Heater fuse blown. Heater
relay faulty. Heater blower switch faulty. Heater blower resistor
faulty. Heater blower motor faulty. Wiring or ground faulty.
INCORRECT TEMPERATURE OUTPUT
Lever Controlled Models
Check for the following conditions: Control cables broken or
binding. Heater hoses leaking or clogged. Water pump faulty. Air
dampers broken. Air ducts clogged. Heater core leaking or clogged.
Heater control faulty.
TESTING
BLOWER SWITCH
Detach multi-pin terminal from blower switch. Use ohmmeter or
circuit tester to check for continuity between terminals at different
switch positions. If continuity is not as shown, replace blower
switch. See BLOWER SWITCH CONTINUITY table. See Figs. 1-3.
BLOWER SWITCH CONTINUITY TABLE
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