OEM 2003 Toyota Sequoia Evaporator

2003 Toyota Sequoia Parts Questions & Experts Answers

• Q: How to service and repair the rear evaporator core on 2003 Toyota Sequoia?

  A: Service technicians must begin with refrigerant discharging from the refrigeration system and then the system must be evacuated followed by a refrigerant charge using the specified amount of 1050-50 g (37.03-1.76 oz.) for Dual A/C and then the drainage of engine coolant from the radiator while leaving some coolant in place. The procedure begins by taking out the rear seat outer belt floor anchors followed by backdoor scuff plate extraction and subsequent removal of the rear door scuff plate on the right-hand side and upper back door garnish and rear window side garnish on the right-hand side. The technician should disconnect the liquid and suction tubes by removing 2 bolts before capping open fittings to prevent moisture or dirt. Installation requires lubricating 2 new O-rings with compressor oil ahead of time. Begin by removing the 3 clips and cover and then removing both air ducts from the rear A/C unit before disconnecting the connectors and wire harness clamps. To remove the expansion valve you need to eliminate the 4 screws, detach the 2 brackets, pry away the packings then eliminate the 2 bolts by using a 5.0 mm hexagon wrench (torque: 5.4 N.m (55 kgf.cm, 48 in..lbf)) plus remove the 3 bolts and lift the A/C unit to detach the tube and accessory and take the holder from its place and disconnect the heat sensing tube by loosening the 2 nuts then remove the expansion valve (Nut A torque: 13 N.m (135 kgf.cm, 10 in..l Add compressor oil to 2 new O-rings before installing them to the expansion valve and proceed with the reinstallation from the reverse order of disassembly.