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.
1999 Chrysler LHSFACTORY OEM SERVICE PROCEDURE
Identifying Diagnostic Trouble Codes
If scan tool displays fault messages in TEST 1A, record messages displayed and perform appropriate test(s) listed in SCAN TOOL MESSAGE DIRECTORY table.
SCAN TOOL MESSAGE DIRECTORY
| Scan Tool Display | Perform Test No. | ||||||
|---|---|---|---|---|---|---|---|
| A/C Control A/C Switch Failure | (1) | ||||||
| A/C Control EBL Switch Failure | (1) | ||||||
| A/C Control Blend Door Input Open Or Shorted To Ground | (1) | ||||||
| A/C Control Blend Door Input Shorted To Battery | (1) | ||||||
| A/C Control Mode Door Input Open Or Shorted To Battery | (1) | ||||||
| A/C Control Mode Door Input Shorted To Ground | (1) | ||||||
| ABS Bus Communication Failure | VEHICLE COMMUNICATIONS TEST 5A(3) | ||||||
| Air Bag Bus Communication Failure | VEHICLE COMMUNICATIONS TEST 2A(3) | ||||||
| Ambient Temperature Sensor Failure | OTIS TEST 2A | ||||||
| ATC Messages Not Received | VEHICLE COMMUNICATIONS TEST 3A (3) | ||||||
| ATC Switch Failure | (1) | ||||||
| Battery Power To Module Disconnected | VEHICLE COMMUNICATIONS TEST 4A (3) | ||||||
| BCM Bus Communication Failure | VEHICLE COMMUNICATIONS TEST 4A (3) | ||||||
| Blend Door Feedback Failure | (1) | ||||||
| Blend Door Output Shorted To Battery | (1) | ||||||
| Blend Door Output Shorted To Ground | (1) | ||||||
| Blend Door Stall Test Failure | (1) | ||||||
| Bus Shorted To Battery | VEHICLE COMMUNICATIONS TEST 13A (3) | ||||||
| Bus Shorted To Ground | VEHICLE COMMUNICATIONS TEST 14A (3) | ||||||
| Common Output Shorted To Battery | (1) | ||||||
| Common Output Shorted To Ground | (1) | ||||||
| Courtesy Lamp Output Short To Battery | INTERIOR LIGHT TEST 2A | ||||||
| Decklid Release Motor Output Failure | POWER DOOR LOCK TEST 18A | ||||||
| Decklid Release Switch Failure | POWER DOOR LOCK TEST 17A | ||||||
| Dimming Level Switch Input Failure | INSTRUMENT CLUSTER TEST 3A | ||||||
| EATX Bus Comm Failure | VEHICLE COMMUNICATIONS TEST 12A (3) | ||||||
| EEPROM Constant Checksum Failure | (2) | ||||||
| Evaporator Temperature Sensor Failure | (1) | ||||||
| Fuel Level Sending Unit Failure | INSTRUMENT CLUSTER TEST 2A | ||||||
| Headlamp Switch Input Failure | EXTERIOR LIGHT TEST 2A | ||||||
| In-Car Temperature Sensor Failure | (1) | ||||||
| Internal Base/Premium Select Failure | (2) | ||||||
| I/P Illumination Failure | INSTRUMENT CLUSTER TEST 9A | ||||||
| Left Central Lock/Unlock Switch Failure | POWER DOOR LOCK TEST 13A | ||||||
| MIC Messages Not Received | VEHICLE COMMUNICATIONS TEST 6A (3) | ||||||
| Mode Door Feedback Failure | (1) | ||||||
| Mode Door Output Shorted To Battery | (1) | ||||||
| Mode Door Output Shorted To Ground | (1) | ||||||
| Mode Door Stall Test Failure | (1) | ||||||
| OTIS Messages Not Received | VEHICLE COMMUNICATIONS TEST 8A (3) | ||||||
| Post Failure | (2) | ||||||
| Recirc Door Output Shorted To Ground | (1) | ||||||
| Recirc Door Output Shorted To Battery | (1) | ||||||
| Recirculation Door Test Failure | (1) | ||||||
| Right Central Lock/Unlock Switch Failure | POWER DOOR LOCK TEST 14A | ||||||
| RKE Unable To Enter Program Mode | POWER DOOR LOCK TEST 15A | ||||||
| RKE Program Mode Entered Without Program Request | POWER DOOR LOCK TEST 16A | ||||||
| SBEC Bus Communication Failure | VEHICLE COMMUNICATIONS TEST 9A (3) | ||||||
| Speed Proportional Steering Circuit Open Or Shorted To Ground | SPEED PROPORTIONAL STEERING TEST 2A | ||||||
| Speed Proportional Steering Circuit Shorted To Battery | SPEED PROPORTIONAL STEERING TEST 3A | ||||||
| Speed Proportional Steering Solenoid Over Temperature | SPEED PROPORTIONAL STEERING TEST 4A | ||||||
| Sun Load Sensor Failure | (1) | ||||||
| Wiper On/Off Relay Output Short High | WIPER TEST 4A | ||||||
| Wiper On/Off Relay Output Open Or Short Low | WIPER TEST 2A | ||||||
| Wiper Park Switch Failure | WIPER TEST 3A | ||||||
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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.