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.
Test 1B - Identifying Trouble Codes
1984 Plymouth Horizon Base, 1.6 ASECTION Test 1B - Identifying Trouble Codes
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.
If DRB displays trouble codes in TEST 1A, record trouble codes displayed and perform appropriate test(s) listed in BODY CONTROL MODULE TROUBLE CODES table.
BODY CONTROL MODULE TROUBLE CODES
| DRB Display | (1) Perform Test | ||||
|---|---|---|---|---|---|
| ATC A/C SWITCH FAILED | TEST 20A | ||||
| ATC AMBIENT TEMP SENSOR FAILURE | TEST 15E | ||||
| ATC AUTO SWITCH FAILED | TEST 20A | ||||
| ATC BI-LEVEL SWITCH FAILED | TEST 20A | ||||
| ATC BLEND DOOR FEEDBACK FAILURE | TEST 25C | ||||
| ATC BLEND DOOR OUTPUT SHORT | TEST 25H | ||||
| ATC BLEND DOOR STALL FAILURE | TEST 25C | ||||
| ATC COMMON DOOR OUTPUT SHORT | TEST 25C | ||||
| ATC DEFROST SWITCH FAILED | TEST 20A | ||||
| ATC EBL SWITCH FAILED | TEST 20A | ||||
| ATC FLOOR SWITCH FAILED | TEST 20A | ||||
| ATC HEAD CCD COMM FAILURE | TEST 18A | ||||
| ATC HEAD COMM TEST FAILED | TEST 18A | ||||
| ATC HEAD STATUS MESSAGE NOT RECEIVED | TEST 18A | ||||
| ATC IN CAR SENSOR FAILURE | TEST 25B | ||||
| ATC MIX SWITCH FAILED | TEST 20A | ||||
| ATC MODE DOOR FEEDBACK FAILURE | TEST 25D | ||||
| ATC MOOD DOOR OUTPUT SHORT | TEST 25J | ||||
| ATC MODE DOOR STALL FAILURE | TEST 25D | ||||
| ATC OFF SWITCH FAILED | TEST 20A | ||||
| ATC PANEL SWITCH FAILED | TEST 20A | ||||
| ATC RECIRC DOOR OUTPUT SHORT | TEST 25F | ||||
| ATC RECIRC DOOR STALL FAILURE | TEST 25E | ||||
| ATC RECIRC SWITCH FAILED | TEST 20A | ||||
| ATC SUN LOAD SENSOR FAILURE | TEST 25G | ||||
| COURTESY LAMP OUTPUT FAILURE | TEST 40A | ||||
| DIMMING MESSAGE | TEST 5A | ||||
| EEPROM CHECKSUM FAILURE | (2) * | ||||
| ENGINE TEMP MSG TEST FAILED | TEST 19B | ||||
| EVAPORATOR SENSOR FAILURE | TEST 25F | ||||
| FUEL SENSOR OPEN | TEST 8B | ||||
| INTERNAL MODULE TESTS FAILED | (2) * | ||||
| PANEL LAMP PWM OUTPUT FAILURE | TEST 5B | ||||
| STATUS 26 NOT RECEIVED | TEST 18A | ||||
| TRANS PRNDL MESSAGE TEST FAILED | TEST 4C | ||||
| WIPER PARK SWITCH FAILURE | TEST 33C | ||||
| BATTERY POWER TO MODULE DISCONNECTED | TEST 53A | ||||
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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.