OEM 2004 Scion xB Heater Core

2004 Scion xB Heater Core Parts Q&A

• Q: How to service and repair the heater core on 2004 Scion xB?

  A: A technicians must begin heater core repair by discharging refrigerant from the refrigeration system through Special Service Tool: 09870-00015 07110-58060 (07117-58080, 07117-58090, 07117-78050, 07117-88060, 07117-88070, 07117-88080). Users should first disconnect the suction hose sub-assy and the liquid tube sub-assy A with Special Service Tool: 09870-00025 followed by removing the heater water inlet hose A by sliding its clip using pliers. After disconnection of the outer hose A follow the same approach. The technicians should remove the heater control knob followed by the instrument cluster finish panel sub-assy CTR and instrument panel sub-assy w/passenger Air Bag assy until they reach the instrument panel assy lower w/instrument panel reinforcement. First remove the defroster nozzle assembly with clip removal to free the claws then continue removing the ECM followed by the air conditioning blower assembly and defroster damper control cable sub-assembly when both outer and inner cables are disconnected and similar for the air mix damper control cable sub-assembly. Dismantle air duct rear No.2 along with air duct rear No.1 through the same procedure. To remove the heater radiator assembly begin by disconnecting the three connectors followed by unbolting and unearthing both the PTC heater and its attachments then use the two nuts to complete uninstallation. Start by removing the air duct assy after dislodging its 4 claws while subsequently removing the heater cover by unscrewing and separating the claws. To remove Cooler Wiring No.2 disconnect the 5 screws until the thermistor assembly becomes accessible for removal with a claw that can also release the clamp. Installation of the heater radiator unit sub-assembly requires you to first unscrew its bracket then remove the clamp followed by disconnecting the connector. Insert the defroster damper control cable sub-assy facing forward with the arm set at FACE position so that the control lever holds the inner cable end and the wire from the outer cable hooks onto the cable clamp securely without wire bending. The same installation sequence must be performed on the air mix damper control cable sub-assy while keeping the arm in MAX (COOL) position. COOL position. Reinstall the ECM together with instrument panel assy lower w/instrument panel reinforcement and the instrument panel sub-assy w/passenger Air Bag assy and both instrument cluster finish panel sub-assy CTR and heater control knob. The necessary next step includes the installation of liquid tube sub-assy A and suction hose sub-assy followed by engine coolant addition and refrigerant charging through Special Service Tool: 07110-58060 (07117-58060, 07117-58070, 07117-58080, 07117-58090, 07117-78050, 07117-88060, 07117-88070, 07117-88080) with a specified range of 380 plus or minus 30 g (13.9 plus or minus 1.1 oz.). First heat the engine while checking for coolant leaks alongside inspecting the refrigerant system for leaks.