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Home >> Jeep >> 1994 >> Wrangler S, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Body Control Computer >> Self-Diagnostic Tests >> Test 1A - Identifying Vehicle Equipment & System Problems

Test 1A - Identifying Vehicle Equipment & System Problems

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION  . For wiring diagram, see WIRING DIAGRAMS article in this section.
  1. Connect DRB to Chrysler Collision Detection (CCD) Data Link Connector (DLC). Turn ignition on. Using DRB, select BODY SYSTEM.
  2. If DRB does not display BUS OPERATIONAL, see VEHICLE COMMUNICATIONS  in this article. If DRB displays BUS OPERATIONAL, go to next step.
  3. If vehicle is equipped with a Mechanical Instrument Cluster (MIC), go to next step. Using DRB, select Electronic Instrument Cluster (EIC). If DRB displays NO RESPONSE, go to TEST 48A  . If DRB does not display NO RESPONSE, go to step 5).
  4. Using DRB, select Mechanical Instrument Cluster (MIC). If DRB displays NO RESPONSE, replace Body Control Module (BCM). Perform TEST VER-1B  . If DRB does not display NO RESPONSE, go to next step.
  5. Using DRB, select body computer. If DRB displays NO RESPONSE, go to TEST 49A  . If DRB does not display NO RESPONSE, go to next step.
  6. Using DRB, select compass mini-trip module (if equipped). If DRB displays NO RESPONSE, go to TEST 50A  . If DRB does not display NO RESPONSE, go to next step.
  7. Using DRB, select Powertrain Control Module (PCM). If DRB displays NO RESPONSE, go to TEST 51A  . If DRB does not display NO RESPONSE, go to next step.
  8. Using DRB, read trouble codes. If DRB does not display any trouble code, see appropriate TC TEST for specific diagnosis. If DRB displays NO VOLTAGE AT PIN 16 OF BODY COMPUTER, go to TEST 49A  . If DRB displays EEPROM CHECKSUM FAILURE, replace BCM. Perform TEST VER-1B  . If DRB displays, WRONG BODY COMPUTER, replace BCM. Perform TEST VER-1B  .
DIAGNOSTIC TEST DIRECTORY (1)

Problem/DRB Message Perform TEST
Electronic Instrument Cluster TEST 2A  .
Electro/Mechanical Instrument Cluster TEST 9A  .
Compass/Mini-Trip Module TEST 15A  .
Power Door Lock System TEST 19A  .
Side Door Memory Lock TEST 21A  .
Windshield Wiper System TEST 22A  .
Illuminated Entry System TEST 25A  .
Courtesy Light System TEST 28A  .
Key-In Light TEST 33A  .
Headlight Time Delay Problem TEST 34A  .
Liftgate Release TEST 36A  .
Seat Belt Light TEST 37A  .
Chime Function TEST 38A  .
(1) When diagnosing a system with many apparent failures, start at top of directory and perform test(s) indicated in order. Make required repairs and perform TEST VER-1B  after each repair.