Toyota 55937-08010 Knob, Center Cluster Module

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Disconnect the negative cable from the battery. On 2006 and earlier models, remove the kick panels, lower dash sound insulators, glove compartment, instrument cluster bezel, and center instrument trim panel. Pull off the control knobs (if equipped). On 2007 and later models, remove the center instrument cluster finish panels. Remove the shift knob. Remove the radio. Remove the A/C switch. Remove the A/C switch mounting screws. On 2006 and earlier models, pull the unit out a little, then push the temperature control shaft through and leave it in position as the control panel is pulled forward. Disconnect the electrical connectors from the A/C switch assembly. Disconnect the one cable at the top of the A/C switch assembly. Disconnect the three cables from the bottom of the A/C switch assembly. Detach the connectors and remove the unit. Installation is the reverse of the removal procedure. Run the engine and check for proper functioning of the heater (and air conditioning if equipped). Cable adjustment (except Automatic Air Conditioning) (2006 and earlier models): To adjust the air inlet control cable, set the control lever to RECIRC, install the cable, and clamp it in place. To adjust the air mix control cable, set the air mix to COOL, install the cable, and lock the clamp while applying slight pressure on the outer cable. To adjust the mode control cable, set the mode to DEF, install the cable, and lock the clamp while applying slight pressure on the outer cable. To adjust the water control cable, set the water valve lever to COOL, install the cable, and lock the clamp while applying slight pressure on the outer cable. Electrical checks (except Automatic Air Conditioning) (2006 and earlier models): Check the A/C switch operation by applying power and ground to the terminals. When the switch is pushed in (ON), the AC indicator light should come on. If it doesn't, replace the switch. Using a self-powered continuity tester, test the terminals on the back of the control unit, starting with the mode control switch. Test the blower speed control switch for continuity. Any tests that do not meet specifications indicate the control unit should be replaced. To replace any control panel components, remove the control knobs, then the screws on the back.