Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Alignment Procedure
- Remove the heater and air conditioning evaporator and blower module assembly (HVAC). Refer to Heater and Air Conditioning Evaporator and Blower Module Removal and Installation .
- Remove the mode control cam. Refer to Mode Control Cam Replacement .
Remove the mode cam screw (1) and the mode cam (2) from the HVAC module.
- Inspect the mode valve levers and internal vent valve operation prior to installing the new mode control cam assembly.
- Replace the components affecting the proper operation of the vent valves.
Rotate the defrost valve lever (1), and vent valve lever (2) clockwise, and heater valve lever (3) counter clockwise to the position shown.
- Using a small brush, apply a lithium based lubricant to the channels of the heater cam, and the mode cam where the levers travel.
Install the heater cam (1) aligning the channel on the back side heater cam with the heater valve lever pin (2).
- Install the mode control cable end (3) into the heater cam, aligning the large male tooth gear on the mode control cable end with the larger heater cam female tooth gear as indicated by the arrows (4).
- Install the mode control cable end screw (5).
- NOTE:
If the heater cam is not aligned to heater valve lever pin correctly, the mode control knob will not function properly.
Turn the control knob on the heater and air conditioning control head to the vent mode position as indicated by the arrow (1).
Install the mode cam (1) aligning the channels on the back side mode cam with the defroster valve lever pin (2), and the vent valve lever pin (3). The pins should be visible through the inspection windows.
- Verify that the large female tooth on the mode control cam (4) is aligned with the large male tooth (5) on the heater cam.
- Install the mode cam screw (6).
The HVAC module must be removed to accurately set the mode cam gear timing. Failure to do so may result in poor HVAC performance, and damage to the HVAC module.
Refer to Fastener Caution .
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.