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A/C Functional Test

WARNING: This page is about a different car, the 1998 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Start engine and allow to idle until operating temperature is reached. Ambient temperature should be 43°F (6°C) or higher.
  1. Rotate mode control (AUTO-PUSH) knob to OFF position. Outside temperature (OUTSIDE TEMP) will be displayed, blower will be set to OFF and OFF LED will turn on.
  2. Rotate mode control knob to max A/C upper (instrument panel outlets), and select either high or low fan setting. Upper LED icon will turn on, air delivery indicator and set temperature are displayed. Blower runs in relation to number of fan speed indicator segments that are lit up. A/C compressor turns on if ambient air temp is greater than 43°F (6°C) and air flows from instrument panel outlets. OUTSIDE TEMP is displayed after 5 seconds of mode operation.
  3. Press mode control knob once and press TEMP button to decrease set temperature. Temperature display will drop in one degree increments down to 65°F (18°C) and then jump down to maximum cold temperature of 60°F (16°C). A/C compressor turns on if ambient air temp is greater than 43°F (6°C) and cool air flows from instrument panel outlets. Blower motor increases to maximum speed. OUTSIDE TEMP is displayed after 5 seconds of mode operation.
  4. Press TEMP button to increase set temperature. Temperature display will increase in one degree increments to 85°F (29°C) and then jump to maximum heat temperature of 90°F (32°C). A/C compressor turns on if ambient air temp is greater than 43°F (6°C) and warm air flows from instrument panel outlets. Blower motor increases to maximum speed. OUTSIDE TEMP is displayed after 5 seconds of mode operation.
  5. Rotate mode control knob to upper and lower (bi-level) position. Blend LED icon will turn on. A/C compressor turns on if ambient air temp is greater than 43°F (6°C) and warm air flows from floor and instrument panel outlets. SET TEMP will be displayed, OUTSIDE TEMP is displayed after 5 seconds of mode operation.
  6. Rotate mode control knob to lower (floor) position. Lower LED icon will turn on. Warm air will flow from floor outlets with small amount from defrost outlets. SET TEMP will be displayed, OUTSIDE TEMP is displayed after 5 seconds of mode operation.
  7. Rotate mode control knob to defog/lower position. A/C compressor turns on if ambient air temp is greater than 43°F (6°C) and warm air will flow from defrost and floor outlets. OUTSIDE TEMP is displayed after 5 seconds of mode operation.
  8. Rotate mode control knob to defrost position. Defog LED icon will turn on. A/C compressor turns on if ambient air temp is greater than 43°F (6°C) and warm air will flow from defrost outlets with small amount from floor outlets. OUTSIDE TEMP is displayed after 5 seconds of mode operation.
  9. Press mode button to activate auto mode. Press A/C button. A/C LED will turn off. A/C compressor will turn off.
  10. Press mode button to activate auto mode. Press A/C button. A/C LED will turn on. A/C compressor will turn on. Air will be delivered based on sensor inputs.
  11. Close all vehicle doors and windows. Set temperature to 75°F (24°C) and press mode control button. Temperature display will increase in one degree increments to 75°F (24°C) and system will adjust to set temperature. OUTSIDE TEMP is displayed after 5 seconds of mode operation. Blower motor speed decreases to minimum after set temperature is achieved.
  12. Turn blower control knob to LOW speed. One blower speed indicator segment will be lit.
  13. Turn blower control knob to HIGH speed. Verify operation of steering wheel blower speed control switch by commanding blower motor to high speed with switch. Blower speed will increase until all blower speed indicator segments are lit.
  14. Turn ignition switch to OFF for 10 seconds, turn ignition switch to ON position. Climate control returns to last setting before ignition switch was turned off. OUTSIDE TEMP is displayed after 5 seconds.
  15. Set temperature to 65°F (18°F), set passenger temperature control to full warm. Temperature on passenger side will be noticeably warmer than driver side.
  16. Set temperature to 85°F (29°F), set passenger temperature control to full cold. Temperature on passenger side will be noticeably cooler than driver side.
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