How to Replace Heater Core on Toyota Avalon & Camry?

The heater core replacing procedure for Toyota car models.The perfect detail for " How to Replace Heater core".
The diagrams and complete procedure to refer.
The instructions are for Toyota Avalon and Camry / Camry Solara car models.

Heater Core replacing help:---

1. Disconnect the negative battery cable.
   
   CAUTION

   After disconnecting the negative battery cable, wait for at least 1 ¹ / ₂minutes for the SRS to deplete its energy.
2. Drain the cooling system into a clean container for reuse.
3. Remove the air bag module and the steering wheel by performing the following procedure:
   
   
   Place the front wheels in the straight-ahead position.

   At both sides of the steering wheel, remove the screw covers.

   Using a Torx socket, loosen the 2 air bag module-to-steering wheel Torx screws until the circumference ring catches on the screw case.

   Carefully, remove the air bag module and disconnect the electrical connector.

   Remove the steering wheel nut.

   Using a steering wheel puller, press the steering wheel from the steering column.
4. Remove the instrument panel by performing the following procedure:
   
   
   Remove the front pillar garnishes and the door scuff plates.

   Remove the hood lock release lever and the cowl side trims.

   Remove the steering column covers and the combination switch.

   Remove the lower finish panel assembly and the instrument panel finish lower left side panel.

   Remove the fuse box bolt and the No. 2 heater-to-register duct.

   Remove the parking brake release lever and the No. 2 undercover.

   Remove the lower No. 2 finish panel.

   If equipped with a column shifter, disconnect the shift control cable from the shift lever housing; then, disconnect the shift control cable from the steering column cable bracket.

   Matchmark the steering column shaft and the control valve shaft.

   Remove the steering column shaft-to-intermediate shaft bolt.

   Remove the steering column-to-instrument panel nuts and remove the steering column assembly.

   Inside the glove compartment, pry out the glove compartment door finish plate.

   Pull out the air bag electrical connector and disconnect it.

   Remove the 3 glove compartment door-to-instrument panel nuts and the door.

   Remove the 4 glove compartment-to-instrument panel screws and the glove compartment; then, disconnect the glove box light connector.

   Remove the passenger-s side air bag module-to-instrument panel 2 bolts and 4 nuts. Carefully, remove the air bag module from the instrument panel.

   Remove the center cluster finish panel and the radio.

   Remove the heater control assembly.

   If equipped with a floor shifter, remove the upper console panel, the rear console box and the front console box.

   If equipped with a column shifter, remove the finish panel.

   Pry out the cluster finish panel.

   Remove the 6 cluster finish panel screws, the cluster finish panel assembly.

   Remove the 4 combination meter screws and the combination meter.

   Disconnect instrument panel electrical connectors.

   Remove the instrument panel-to-chassis nuts/bolts and the remove the instrument panel.
5. Remove the instrument panels No. 2 brace.
6. Disconnect the heater hoses from the heater core.
7. Remove the 2 heater pipes-to-heater core screws and clips; then, disconnect the heater pipes from the heater core.
8. Remove the heater core O-rings and discard them.
9. Remove the heater core from the heater housing. 
   
   
   
   Fig. Exploded view of the air bag module, the steering wheel, the floor shift steering column and related components-2002-04 Avalon
   
   
   
   
   Fig. Exploded view of the air bag module, the steering wheel, the column shift steering column and related components-2002-04 Avalon
   
   
   
   

   

   Fig. Releasing the air bag module-to-steering wheel screws-2002-04 Avalon
   
   
   
   

   

   Fig. Disconnecting and positioning the air bag module-2002-04 Avalon
   
   
   
   

   

   Fig. Exploded view of the instrument panel and related components-2002-04 Avalon
   
   
   
   

   

   Fig. Exploded view of the wiring harness, ventilation system and related components-2002-04 Avalon
   
   
   
   

   

   Fig. View of the heater/air conditioning assembly and related components-2002-04 Avalon
   
   
   
   

   

   Fig. Exploded view of the evaporator housing, heater housing, heater core and related components-2002-04 Avalon

To install:

1. Install the heater core to the heater housing.
2. Install new heater core O-rings.
3. Install the heater pipes to the heater core; then, the 2 heater pipes-to-heater core screws and clips.
4. Install the heater hoses to the heater core.
5. Install the instrument panels No. 2 brace.
6. Install the instrument panel by performing the following procedure:
   
   
   Install the instrument panel and the instrument panel-to-chassis nuts/bolts.

   Install instrument panel electrical connectors.

   Install the combination meter and the 4 combination meter screws.

   Install the cluster finish panel, the 6 cluster finish panel assembly screws.

   Install the cluster finish panel.

   If equipped with a column shifter, install the finish panel.

   If equipped with a floor shifter, install the upper console panel, the rear console box and the front console box.

   Install the heater control assembly.

   Install the center cluster finish panel and the radio.

   Carefully, install the air bag module to the instrument panel; then, install the passenger-s side air bag module-to-instrument panel 2 bolts and 4 nuts.

   Install the glove compartment and the 4 glove compartment-to-instrument panel screws; then, install the glove box light connector.

   Install the glove compartment door and the 3 door-to-instrument panel nuts.

   Connect the air bag electrical connector.

   Inside the glove compartment, install the glove compartment door finish plate.

   Install the steering column assembly and the steering column-to-instrument panel nuts; then, torque the nuts to 19 ft. lbs. (25 Nm).

   Align the matchmarks and install the steering column shaft-to-intermediate shaft bolt.

   If equipped with a column shifter, install the shift control cable to the shift lever housing; then, install the shift control cable to the steering column cable bracket.

   Install the lower No. 2 finish panel.

   Install the parking brake release lever and the No. 2 undercover.

   Install the fuse box bolt and the No. 2 heater-to-register duct.

   Install the lower finish panel assembly and the instrument panel finish lower left side panel.

   Install the steering column covers and the combination switch.

   Install the hood lock release lever and the cowl side trims.

   Install the front pillar garnishes and the door scuff plates.
7. Install the air bag module and the steering wheel by performing the following procedure:
   
   
   Align the matchmarks and install the steering wheel to the steering column.

   Install the steering wheel nut and torque to 26 ft. lbs. (35 Nm).

   Carefully, connect the electrical connector and install the air bag module.

   Using a Torx socket, tighten the 2 air bag module-to-steering wheel Torx screws to 78 inch lbs. (8.8 Nm).

   At both sides of the steering wheel, install the screw covers.
8. Refill the cooling system.
9. Install the negative battery cable.
10. Operate the engine to normal operating temperatures; then, check the climate control operation and check for leaks.

1. Before servicing the vehicle, refer to the Precautions Section.
2. Discharge and recover the refrigerant from the air conditioning system.
3. Drain the cooling system.
4. Remove or disconnect the following:
   
   
   Negative battery cable

   Wiper arm and blade assembly

   Right-side top cowl ventilator louver

   Wiper motor and linkage assembly

   Outside top cowl panel

   Air conditioner lines

   Heater hoses
5. To remove the instrument panel safety pad, remove or disconnect the following:
   
   
   Steering wheel covers

   Horn button

   Steering wheel assembly

   Steering column covers

   Turn signal switch assembly

   Instrument cluster finishing trim

   Instrument panel trim around the steering column

   Instrument panel center panel

   Radio

   Instrument cluster cover

   Gauge cluster assembly

   Accessory cluster assembly

   Instrument panel registers

   Speaker covers

   Front speakers

   Side cowl trim

   Front door scuff plates

   Instrument panel under cover

   Lower finishing panels

   Lower instrument panel airbag assembly

   Shift lever knob

   Shift indicator housing

   Seat heater switch, if equipped

   Center console upper panel
   
   

   

   

   Fig. Location of the clips holding the center console-2005-06 Avalon
   
   
   
   
   Center console

   Lower center instrument panel

   Instrument side panels

   A-pillar trim

   Passenger airbag connector

   Instrument panel safety pad
   
   

   

   

   Fig. Location of the instrument panel mounting clips and nuts-2005-06 Avalon
6. Remove or disconnect the following:
   
   
   No. 2 heater duct

   No. 6 heater duct

   Console box duct

   Floor carpet brackets

   Rear air ducts

   No. 1 air duct

   Steering intermediate shaft

   Steering column assembly

   Instrument panel reinforcement
   
   

   

   

   Fig. Location of the clamps for the instrument panel reinforcement wiring harness-2005-06 Avalon

   
   
   

   

   

   Fig. Location of the mounting points for the instrument panel reinforcement and exploded view of the ventilation system-2005-06 Avalon
   
   
   
   
   Blower assembly
7. Remove or disconnect the following from the blower assembly:
   
   
   Air outlet control servomotor

   Air mix control servomotor

   Heater pipe clamps

   Heater core
8. Installation is the reverse order of removal.
9. Refill the cooling system to the correct level.
10. Start the engine and check for leaks.

NOTE

Removal of the heater core requires removal of the entire heater air conditioning assembly.

1. Before servicing the vehicle, refer to the Precautions Section.
2. Drain the cooling system into a clean container for reuse.
3. Disconnect the negative battery cable. Wait 90 seconds before doing any further work while the airbag system de-energizes.
4. Discharge and recover the air conditioning system refrigerant.
5. Disconnect A/C suction hose (No. 1) and Liquid pipe (A)
   1. Install SST to piping clamp
   2. Push down SST and release the clamp lock
      
      WARNING

      Be careful not to deform the tube, when pushing the SST
      
      
      
      NOTE

      Cap the open fittings immediately to prevent system contamination
6. Remove or disconnect the following:
   
   
   Heater core hoses
7. Disassemble the dash components as follows
   
   WARNING

   Follow air bag removal procedures
   
   
   
   
   Lower steering column cover

   Steering wheel

   Instrument cluster finish panel sub-assembly

   Steering column cover

   Headlamp dimmer switch assembly

   Windshield wiper switch assembly

   Combination meter assembly

   Door scuff plates

   LH instrument panel under cover sub-assembly

   Cowl side trim

   Coin box

   LH upper instrument panel sub assembly

   LH lower instrument panel brace

   Air conditioning control assembly
   
   

   

   

   Fig.  Instrument cluster finish panel clip locations-Camry

   
   
   

   

   

   Fig.  Air conditioning control panel clips-Camry

   
   
   

   

   

   Fig. Radio panel clips-Camry

   Instrument panel center cluster finish panel

   Glove box door

   RH lower instrument panel sub-assembly

   Shift lever knob on M/T

   Remove the console panel

   Rear console box

   Cup holder and ashtray

   Upper console panel

   Front console box

   Instrument panel finish plate

   LH & RH front pillar garnish

   Instrument panel speakers

   Passenger air bag connector

   Instrument panel safety pad cap

   Instrument panel safety pad sub-assembly
8. Remove or disconnect the following:
   
   
   Rear air ducts

   Console box duct

   Floor shift parking lock cable assembly

   Windshield wiper relay assembly

   Instrument panel brace assemblies

   Lower instrument finish panel retainer

   Heater to foot ducts

   Steering column assembly

   Instrument panel reinforcements

   Heater blower assembly

   Lower defroster nozzles

   Air conditioning radiator assembly

   Mode damper servo sub-assembly

   Airmix damper servo sub-assembly

   Heater radiator (core) sub-assembly
   
   

   

   

   Fig. Instrument panel safety pad fastener locations-Camry

   
   
   

   

   

   Fig.  Air conditioning radiator assembly-Camry

To install:

Install or connect the following:

1. Heater core unit sub assembly
   
   
   Heater core into A/C assembly

   Screw and clamp

   Air conditioning radiator assembly

   Lower defroster nozzles

   Heater blower assembly

   Instrument panel reinforcements

   Steering column assembly

   Heater to foot ducts

   Lower instrument finish panel retainer

   Instrument panel brace assemblies

   Windshield wiper relay assembly and

   Floor shift parking lock cable assembly

   Console box duct

   Rear air ducts
2. Reassemble the dash components in the reverse of removal.
3. Install or connect the following:
   
   NOTE

   Lubricate O-rings with compressor oil
   
   
   
   
   Heater core hoses

   A/C suction and pressure hoses, attach with bolt and plate
   
   
   
   
   Negative battery cable
4. Refill the cooling system to the correct level.
5. Evacuate and recharge A/C system
6. Start the engine and check for leaks.

1. Disconnect the negative battery cable.
2. Drain the cooling system into a clean container for reuse.
3. Disconnect the heater hoses from the heater core.
4. At the driver-s side, remove the lower instrument panel.
5. Remove the left hand instrument lower panel.
6. At the heater/air conditioning housing, disengage the 3 heater protector-to-heater/air conditioning housing clips and remove the heater protector.
7. Remove the 3 heater core pipe clamp screws and the clamps.
8. Remove the 2 heater core pipe clamp screws and the clamps; then, disconnect the pipes from the heater core.
9. Remove the heater core.
   
   
   

   

   Fig. Exploded view of the instrument panel, heater/air conditioning housing and related components-Solara
   
   
   
   

   

   Fig. Exploded view of the heater/air conditioning housing, heater core, evaporator core and related components-Solara
   
   
   
   

   

   Fig. View of the heater core-Solara

To install:

1. Install the heater core.
2. Connect the pipes to the heater core and install the heater core pipe clamp and the 2 clamp screws.
3. Install the heater core pipe clamps and the 3 clamp screws.
4. At the heater/air conditioning housing, install the heater protector and engage the 3 heater protector-to-heater/air conditioning housing clips.
5. Install the left hand instrument lower panel.
6. At the driver-s side, install the lower instrument panel.
7. Connect the negative battery cable.
8. Connect the heater hoses to the heater core.
9. Refill the cooling system to the correct level.

These details will help.

Thanks.

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