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Home >> Jeep >> 1996 >> Grand Cherokee Limited, 5.2 Y >> Repair and Diagnosis >> External Pages >> Different car >> Section 32 (A/C-Heater System - Automatic) >> Trouble Shooting >> Test 20A - ATC Head Switches

Test 20A - ATC Head Switches

WARNING: This page is about a different car, the 1994 Eagle Vision, 1994 Dodge Intrepid, 1994 Chrysler New Yorker, 1994 Chrysler LHS, and 1994 Chrysler Concorde. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Perform TEST 17A or 19A before proceeding with this test.
  1. Connect DRB. Read ATC HEAD PANEL SWITCH. If PANEL SW: OPEN appears on display, go to next step. If display is otherwise, replace ATC head. Perform VERIFICATION TEST.
  2. Read ATC HEAD PANEL SWITCH while pressing panel button. If DRB display is not PANEL SW: OPEN, go to next step. If display is PANEL SW: OPEN, replace ATC head. Perform VERIFICATION TEST.
  3. Release panel button. Read ATC HEAD BILEVEL SWITCH. If BILEVEL SW: OPEN appears on display, go to next step. If display is otherwise, replace ATC head. Perform VERIFICATION TEST.
  4. Read ATC HEAD BILEVEL SWITCH while pressing bi-level button. If DRB display is not BILEVEL SW: OPEN, go to next step. If display is BILEVEL SW: OPEN, replace ATC head. Perform VERIFICATION TEST.
  5. Release bi-level button. Read ATC HEAD RECIRCULATION SWITCH. If RECIRC SW: OPEN appears on display, go to next step. If display is otherwise, replace ATC head. Perform VERIFICATION TEST.
  6. Read ATC HEAD RECIRCULATION SWITCH while pressing recirculation button. If DRB display is not RECIRC SW: OPEN, go to next step. If display is RECIRC SW: OPEN, replace ATC head. Perform VERIFICATION TEST.
  7. Release recirculation button. Read ATC HEAD REAR DEFROSTER SWITCH. If REAR DEF SW: OPEN appears on display, go to next step. If display is otherwise, replace ATC head. Perform VERIFICATION TEST.
  8. Read ATC HEAD REAR DEFROSTER SWITCH while pressing rear defroster button. If DRB display is not REAR SW: OPEN, go to next step. If display is REAR DEF SW: OPEN, replace ATC head. Perform VERIFICATION TEST.
  9. Release rear defroster button. Read ATC HEAD FLOOR SWITCH. If FLOOR SW: OPEN appears on display, go to next step. If display is otherwise, replace ATC head. Perform VERIFICATION TEST.
  10. Read ATC HEAD FLOOR SWITCH while pressing floor button. If DRB display is not FLOOR SW: OPEN, go to next step. If display is FLOOR SW: OPEN, replace ATC head. Perform VERIFICATION TEST.
  11. Release floor button. Read ATC HEAD MIX (FLOOR AND DEFROST) SWITCH. If MIX SW: OPEN appears on display, go to next step. If display is otherwise, replace ATC head. Perform VERIFICATION TEST.
  12. Read ATC HEAD MIX (FLOOR AND DEFROST) SWITCH while pressing mix (floor and defrost) button. If DRB display is not MIX SW: OPEN, go to next step. If display is MIX SW: OPEN, replace ATC head. Perform VERIFICATION TEST.
  13. Release mix button. Read ATC HEAD A/C SWITCH. If A/C SW: OPEN appears on display, go to next step. If display is otherwise, replace ATC head. Perform VERIFICATION TEST.
  14. Read ATC A/C SWITCH while pressing A/C button. If DRB display is not A/C SW: OPEN, go to next step. If display is A/C SW: OPEN, replace ATC head. Perform VERIFICATION TEST.
  15. Release A/C button. Read ATC HEAD WINDSHIELD DEFROSTER SWITCH. If DEFROST SW: OPEN appears on display, go to next step. If display is otherwise, replace ATC head. Perform VERIFICATION TEST.
  16. Read ATC WINDSHIELD DEFROSTER SWITCH while pressing windshield defroster button. If DRB display is not DEFROST SW: OPEN, go to next step. If display is DEFROST SW: OPEN, replace ATC head. Perform VERIFICATION TEST.
  17. Release windshield defroster button. Read ATC HEAD OFF SWITCH. If OFF SW: OPEN appears on display, go to next step. If display is otherwise, replace ATC head. Perform VERIFICATION TEST.
  18. Read ATC OFF SWITCH while pressing ATC head off button. If DRB display is not OFF SW: OPEN, go to next step. If display is OFF SW: OPEN, replace ATC head. Perform VERIFICATION TEST.
  19. Release off button. Read ATC HEAD AUTO SWITCH. If AUTO SW: OPEN appears on display, go to next step. If display is otherwise, replace ATC head. Perform VERIFICATION TEST.
  20. Read ATC AUTO SWITCH while pressing ATC head auto button. If DRB display is not AUTO SW: OPEN, system is okay. If display is AUTO SW: OPEN, replace ATC head. Perform VERIFICATION TEST.
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