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Test 3A - Identifying Climate Control Related Codes

WARNING: This page is about a different car, the 1995 Eagle Vision, 1995 Dodge Intrepid, 1995 Chrysler New Yorker, 1995 Chrysler LHS, and 1995 Chrysler Concorde. However, it is still accessible from the selected car via links, so may be relevant.
  1. Using DRB, record and erase trouble codes. Set ATC control to 75°F (24°C). Start engine and check for Body Control Module (BCM) trouble codes. If no trouble codes are present, slowly change ATC control from 65°F (18°C) to 85°F (29°C), and then back to 65°F (18°C) while looking for BCM trouble codes. If no trouble codes are present, go to next step. If trouble code(s) are present, perform specified test. See TEST 3A TROUBLE CODES  table.
  2. If there are no trouble codes present, slowly change ATC control from 60°F (16°C) to 90°F (32°C), and then back to 60°F (16°C). Then push each of 8 mode buttons in turn, waiting 30 seconds after each is pushed. If no trouble codes are present, go to next step. If trouble codes are displayed, note first trouble code displayed, and perform specified test for that trouble code. See TEST 3A TROUBLE CODES  table.
  3. Calibrate mode doors by simultaneously pressing and holding floor, mix and defrost buttons until display begins to flash. Check DRB for any trouble codes. If trouble codes are displayed, note first trouble code displayed, and perform specified test for that trouble code. See TEST 3A TROUBLE CODES  table. If no trouble codes are displayed, operate automatic A/C system while observing performance, and then go to TEST 2A.
NOTE: If more than one trouble code is displayed, repair code(s) related to a short circuit first.
TEST 3A TROUBLE CODES

Trouble Code Perform Test
ATC Head Switches (1) 5A
ATC Ambient Temp. Sensor Failure 83A
ATC Blend Door Feedback/Stall Failure 6A
ATC Blend Door Output Short To Ground Or B+ 7A
ATC Common Door Output Short To Ground Or B+ 8A
ATC Communication Head Failures (2) 4A
ATC Aspirator & In-Car Sensor Failure 9A
ATC Mode Door Feedback Or Stall Failure 10A
ATC Mode Door Output Short To Ground Or B+ 11A
ATC Recirculation Door Stall Failure (3) 12A
ATC Recirculation Door Output Short To Ground Or B+ 13A
ATC Sun Load Sensor Failure 14A
ATC Engine Temp Msg Test Failed 15A
ATC Evaporator Sensor Failure 16A
(1) Includes ATC head A/C, AUTO, bi-level, FRT (front) defrost, REAR defogger, floor, mix, OFF, panel and REC (recirculation) switches.
(2) Includes ATC Head CCD COMM FAILURE, COMM TEST FAILED, STATUS MESSAGE NOT RECEIVED, NO RESPONSE, STATUS 26 NOT RECEIVED or DIMMING MESSAGE messages displayed on DRB.
(3) If this trouble code is displayed with other codes, repair other trouble code(s) first.
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