1999 Chrysler LHSFACTORY OEM SERVICE PROCEDURE

Identifying Vehicle Equipment & System Problems

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION in BODY CONTROL COMPUTER - INTRODUCTION article.
  1. Connect scan tool to Data Link Connector (DLC). DLC is located under instrument cluster, right of steering column. If scan tool screen is blank, see appropriate VEHICLE COMMUNICATIONS article. If scan tool is not blank, go to next step.
  2. Using scan tool, read body DTCs (fault messages). If any fault messages are displayed, go to SYSTEM ID TEST 1B . If no fault messages are displayed, see SYSTEM DIAGNOSTIC TEST DIRECTORY  table for specific system diagnosis. When diagnosing a vehicle with many apparent failures, start at top of table and perform indicated tests. Failures may occur separately or in various combinations. After repairs, ensure specific failure or group of failures have been corrected.
SYSTEM DIAGNOSTIC TEST DIRECTORY (1)

Suspected System Perform Test No.
Chime System CHIME TEST 1A 
Door Ajar Indicator System DOOR AJAR TEST 1A 
Exterior Lighting System EXTERIOR LIGHT TEST 1A 
Instrument Cluster INSTRUMENT CLUSTER TEST 1A 
Interior Lighting System INTERIOR LIGHT TEST 1A 
Memory System MEMORY SYSTEM TEST 1A 
Overhead Travel Information System (OTIS) OTIS TEST 1A 
PCI BUS Failures (2) VEHICLE COMMUNICATIONS TEST 1A
Power Door Lock System POWER DOOR LOCK TEST 1A 
Remote Keyless Entry System POWER DOOR LOCK TEST 1A 
Sentry Key Immobilizer System SKIS TEST 1A 
Speed Proportional Steering System SPEED PROPORTIONAL STEERING SYSTEM TEST 1A 
Vehicle Communication System (2) VEHICLE COMM. TEST 1A
Vehicle Theft Security System VTSS TEST 1A 
Windshield Wiper System WIPER TEST 1A 
(1) For automatic or manual A/C-heater system test procedures, see appropriate lemon-25® AIR CONDITIONING & HEATING SERVICE & REPAIR, DOMESTIC CARS, LIGHT TRUCKS & VANS manual. For testing information on air bag systems, see appropriate lemon-25® AIR BAG SERVICE & REPAIR, DOMESTIC & IMPORTED.
(2) See appropriate VEHICLE COMMUNICATIONS article.
Factory Service Tools

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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.

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