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.
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HOMESERVICE MANUALSPLYMOUTH1984HORIZON BASE, 1.6 AREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 19 (ENGINE CONTROLS - TESTS W/CODES - BODY CONTROL COMPUTER (CONVERT))SELF-DIAGNOSTIC TESTSTEST 1A - IDENTIFYING VEHICLE EQUIPMENT & SYSTEM PROBLEMS
1984 Plymouth Horizon Base, 1.6 A
Test 1A - Identifying Vehicle Equipment & System Problems
1984 Plymouth Horizon Base, 1.6 ASECTION Test 1A - Identifying Vehicle Equipment & System Problems
WARNING: This page is about a different car, the 1994 Chrysler LeBaron. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For connector terminal identification, see CONNECTOR
IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS
. When directed to go to next step, disregard step if vehicle is not equipped with module being tested.
- Connect DRB to Chrysler Collision Detection (CCD) DATA LINK CONNECTOR (DLC). DLC is located under dash to left of steering column. Turn ignition switch to ON position. Using DRB, select BODY SYSTEM.
- If DRB does not display BUS OPERATIONAL, see VEHICLE COMMUNICATIONS. If DRB displays BUS OPERATIONAL, go to next step.
- Using DRB, select body controller. If DRB displays NO RESPONSE, go to TEST 69A . If DRB does not display NO RESPONSE, go to next step.
- Using DRB, select electronic cluster, if equipped. If DRB displays NO RESPONSE, go to TEST 70A . If DRB does not display NO RESPONSE, go to next step.
- Using DRB, select Electronic Vehicle Information Center (EVIC), if equipped. If DRB displays NO RESPONSE, go to TEST 71A. If DRB does not display NO RESPONSE, go to next step.
- Using DRB, select traveler, if equipped. If DRB displays NO RESPONSE, go to TEST 72A . If DRB does not display NO RESPONSE, go to next step.
- Using DRB, select compass temperature, if equipped. If DRB displays NO RESPONSE, go to TEST 73A . If DRB does not display NO RESPONSE, go to next step.
- Using DRB, select engine node, if equipped. If DRB displays NO RESPONSE, go to TEST 74A . If DRB does not display NO RESPONSE, go to next step.
- Using DRB, select PCM monitor. If DRB displays NO RESPONSE, go to TEST 75A
. If DRB does not display NO RESPONSE, go to next step.NOTE: Perform TEST VER-1 after each repair.
- Using DRB, read trouble codes. If DRB does not display trouble codes, see DIAGNOSTIC TEST DIRECTORY table for specific diagnosis. If DRB displays trouble codes, go to next step.
- If DRB displays NO VOLTAGE AT PIN 16 OF BODY COMPUTER, go to TEST 69A. If DRB does not display NO VOLTAGE AT PIN 16 OF BODY COMPUTER, go to next step.
- If DRB displays EEPROM CHECKSUM FAILURE, replace Body Control Module (BCM). If DRB does not display EEPROM CHECKSUM FAILURE, go to next step.
- If DRB displays ODOMETER TEST FAILURE, replace BCM. If DRB does not display ODOMETER TEST FAILURE, go to next step.
- If DRB displays WRONG BODY COMPUTER, install correct BCM. If DRB does not display WRONG BODY COMPUTER, proceed to DIAGNOSTIC TEST DIRECTORY for specific diagnosis.
DIAGNOSTIC TEST DIRECTORY
| Problem/Message | Perform Test |
|---|---|
| EVIC Panel Blank | 2A |
| Message On The EVIC Panel | 3A |
| Missing Message On The EVIC | 3A |
| EVIC Panel Switches | 31A |
| EVIC Panel Switch Function | 31A |
| EVIC Panel Illumination | 40A |
| Electronic Instrument Cluster | 32A |
| Door Lock System | 41A |
| Intermittent Wiper System | 43A |
| Illuminated Entry System | 46A |
| Courtesy Lamp System | 47A |
| Traveler Module | 52A |
| Compass/Temp Module | 55A |
| Key-In Lamp | 57A |
| Headlamp Time Delay Will Not Work | 58A |
| Mechanical Cluster Warning Lamp | 59A |
| Chime Functions | 63A |
RENDER: 1.0x
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.