DESCRIPTION
The heater system consists of blower case, heater case and air distribution ducts.
On Festiva, the blower case is mounted to the bulkhead, behind the instrument panel on the passenger's side of vehicle. The blower case houses the blower motor, blower motor resistor and the fresh/recirculated air door.
On Tracer, the heater case is mounted to the bulkhead behind the center of the instrument panel. The blower is housed in a common housing with the heater core, air discharge doors and air temperature door.
All air control doors are cable operated from the control panel, located in the center of the instrument panel. Both models have rear floor ducts to supply heated air to rear passengers.
OPERATION
The heater and ventilation assembly uses a blend air system. Outside air enters the system through the cowl and air inlet duct. The fresh/recirculated air door, located in the air inlet duct, regulates the mixture of outside and recirculated air in the interior of the vehicle.
From the air inlet duct, air flows into the air distribution plenum where it is routed to the discharge outlets. The temperature of air leaving the outlets depends upon the position of the temperature control door. In the "MAX" heat position, incoming air flows through the heater core. In the "MAX" cool position, air by-passes the heater core. Intermediate positions, between "MAX" cool and "MAX" heat, provide a blend of heated and outside air.
MODE WIRE (FESTIVA)
Set mode control knob to "DEF" position. Pull mode lever downward to its extreme stop and install loop of wire onto lever. Set fan speed to "3" position and ensure proper air circulation. Adjust as required.
MODE WIRE (TRACER)
- Set mode control knob to "DEF" position. Pull mode lever downward to its extreme stop and install loop of wire onto lever.
- Pull connecting rod downward to its extreme stop. Use clip to install connecting rod to fastener. Set fan speed to "4" position to ensure proper air circulation. Adjust as required.
AIR-MIX DOOR CONTROL WIRE
- Set "TEMP" lever to "MAX-COLD" position. Pull wire lever downward to its extreme stop. Attach air-mix wire loop onto lever.
- Pull connecting rod lever upward to its extreme stop. Use clip to install connecting rod to fastener. Ensure proper operation of temperature control.
OUTSIDE/RECIR AIR CONTROL DOOR WIRE
Set selector lever at fresh air intake position. Push door lever forward to its extreme stop and attach wire loop to lever. Ensure proper operation of "REC-FRESH" air selector control.
INSUFFICIENT HEATER TEMPERATURE
Check for proper coolant level. Check water pump for noise, leaks or wear. Check heater hoses for leaks or restrictions. Check heater core for leaks, plugs or restrictions. Check inlet and outlet heater hoses for hot water flow. Check thermostat condition and operation. Check air mix door position and adjust cable if necessary.
IMPROPER WARM AIR DISTRIBUTION
Check air mix door position. Adjust cable as necessary. Check function control door position. Adjust cable as necessary. Check for restriction in ventilation air duct assembly. Repair as necessary.
BLOWER MOTOR POWER CIRCUIT
Using voltmeter, check for battery voltage at blower motor with ignition on. Check Blue/Yellow wire on Festiva models and Blue wire on Tracer models. If battery voltage is not present, check fuses and wiring.
Removal & Installation
- Disconnect negative battery cable. Remove steering wheel by prying out center trim insert and removing steering wheel retaining nut. Remove 2 steering wheel cover retaining screws and remove cover. Using a steering wheel puller, remove steering wheel.
- Remove 5 screws and remove lower and upper steering column covers. Disconnect electrical connections and remove multifunction switch. Remove 5 screws and pull instrument cluster hood rearward. Disconnect electrical connections and remove instrument cluster hood.
- Disconnect speedometer cable at transaxle. Remove 4 instrument cluster screws. Pull instrument cluster rearward and disconnect speedometer cable and electrical connections. Remove instrument cluster.
- Remove 2 center bracket mounting bolts under steering column and remove bracket. Remove glove box attaching screws and remove glove box. Remove left and right heater ducts. Remove fuse panel cover. Remove 2 screws securing fuse panel and push fuse panel inward. DO NOT remove fuse panel.
- Slide both seats to most forward position. Remove 2 console attaching screws, just in front of seat belt anchors. Slide both seats to rearmost position. Remove park brake console insert. Using a Phillips screwdriver, remove push retainer insert, located at front lower edge of park brake console. Pull back on park brake lever and remove park brake console.
- Remove gearshift knob. Remove screws and remove shift console. Remove radio/heater control panel bezel screws and remove bezel. Remove 4 radio attaching screws. Pull radio out and disconnect antenna lead and electrical connections. Disconnect radio ground lead and remove radio.
- Remove 4 screws attaching heater control panel. Disconnect control cables and electrical connections and remove control panel, pulling cables through opening.
- Pry out bolt cover trim inserts in top corners of dash. Remove bolts located under trim panels. Remove 7 instrument panel attaching bolts and 2 nuts. Pull instrument panel rearward disconnecting any harness connectors and clips. Remove instrument panel.
- Disconnect electrical connections at blower and resistor. Remove harness from routing brackets on heater box. Loosen clamp screw securing air inlet housing. Remove attaching nuts at top and bottom of heater box. Disconnect defroster ducts and remove heater assembly.
- Disconnect link connecting 2 defroster doors. Remove attaching screw just above and right of blower resistor. Turn heater assembly around and remove screw just to left of blower motor opening. Remove clips securing 2 halves of heater assembly. Separate halves. Lift out heater core.
- To install, reverse removal procedure. Ensure all heater control cables are routed and adjusted properly. Fill cooling system.
- Disconnect negative battery cable. Drain cooling system. Remove left and right sound deadening panels. Remove screws and remove lap register panel.
- Disconnect 3 heater control cables at heater assembly. Reach behind instrument panel and disconnect speedometer cable. Disconnect 3 electrical connectors on back of instrument panel. Remove 3 screws securing brace below lap duct. Remove lap duct and driver's demister tube.
- Remove 5 screws and remove steering column covers. Remove 4 steering column mount bolts and lower steering column. Remove 2 screws and remove glove box. Loosen nut securing hood release cable and move cable to one side.
- Remove rear console by sliding seats full forward. Remove 2 console retaining screws. Slide seats full rearward. Remove 2 rear console-to-front console retaining screws. Remove rear console. Remove shifter knob. Remove front console attaching screws. Remove front console.
- Remove 2 screws and remove lower trim panel below radio. Using a screwdriver, pry out 5 instrument panel mounting bolt covers at top of dash. Remove 9 instrument panel attaching bolts and 2 nuts. Lift up on instrument panel and pull out slightly. Disconnect blower motor, instrument panel and radio electrical connections. Remove instrument panel.
- Disconnect heater hoses. Remove push pins attaching defroster tubes to heater case and remove defroster tubes. Remove push pin and remove main air duct from heater case. Remove 2 push pins and one screw retaining lower carpet panel under heater case.
- Disconnect all wiring harness clips from heater case brace. Remove 3 lower brace screws and remove brace. Remove 2 heater case lower mounting bolts and 2 upper nuts. Remove one mounting nut on passenger side. Remove 2 push pins attaching lower duct to heater case. Remove heater case by pulling straight back.
- Remove 3 screws and remove heater core cover. Remove heater core tube braces. Pull heater core straight out of heater case. Remove extension tube clips and remove outlet and inlet extension tubes. To install, reverse removal procedure. Always use new "O" ring on outlet extension tube.
Disconnect negative battery cable. On Festiva, remove instrument panel spacer brace located below steering column. Remove airflow duct below steering column. On Tracer, remove passenger sound deadening panel. On all models, disconnect blower motor or resistor wiring. Remove 3 blower motor attaching screws or 2 resistor attaching screws and remove component. To install, reverse removal procedure.
