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 MANUALSPLYMOUTH1994LASER RS TURBO, AWD, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)EXTERNAL PAGESDIFFERENT CARSECTION 12 (ENGINE CONTROLS - TESTS W/CODES - BODY CONTROL COMPUTER)
1994 Plymouth Laser RS Turbo, AWD, Automatic
Section 12 (Engine Controls - Tests W/Codes - Body Control Computer)
1994 Plymouth Laser RS Turbo, AWD, AutomaticSECTION Section 12 (Engine Controls - Tests W/Codes - Body Control Computer)
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.
- Introduction
- Description
- Operation
- Self-Diagnostic System
- Diagnostic Procedure
- Connector Identification
- Self-Diagnostic Tests
- Notes
- Test 1A - Identifying Vehicle Equipment & System Problems
- Test 1B - Identifying Trouble Codes
- Test 2A - Identifying Instrument Cluster Problems
- Test 2B - Instrument Cluster Gauge Problem
- Test 2C - Repairing Instrument Cluster Power Supply
- Test 2D - Repairing Instrument Cluster Ignition Supply
- Test 3A - Repairing Instrument Cluster Sense Circuits
- Test 3B - Repairing Instrument Cluster Sense Circuits
- Test 4A - Diagnosing Warning Lamp Problems
- Test 4B - Repairing Instrument Cluster Printed Circuit Board
- Test 4C - Repairing Communication W/ Trans CNTRL Module
- Test 5A - Diagnosing Instrument Cluster Illumination Problem
- Test 5B - Repairing PRKNG Lamp SW Output CKT For Short To GND
- Test 5C - Repairing PRKNG Lamp SW Output CKT For Short To Batt
- Test 5D - Repairing Parking Lamp Switch Power Supply
- Test 5E - Repairing Open Panel Lamps Driver Circuit
- Test 5F - Diagnosing Parking Lamp Switch
- Test 5G - Repairing PRKNG Lamp SW Output CKT For Short To GND
- Test 6A - Repairing Instrument Cluster Temperature Gauge
- Test 7A - Repairing Faulty Gauge
- Test 8A - Repairing Fuel Gauge Warning Lamp
- Test 8B - Repairing Fuel Gauge Warning Lamp
- Test 8C - Repairing Fuel Gauge Warning Lamp
- Test 9A - Repairing Faulty Speedometer
- Test 10A - Repairing Oil Press SW Sense CKT For Short To GND
- Test 10B - Repairing Open Oil Pressure Switch Sense Circuit
- Test 11A - Repairing Seat Belt Switch CKT For Short To Ground
- Test 12A - Repairing Open Seat Belt Switch Circuit
- Test 13A - Diagnosing Parking Brake Warning Lamp
- Test 13B - Repairing Open Brake Fluid Level Switch Circuit
- Test 13C - Repairing Open Parking Brake Switch Circuit
- Test 13D - Repairing Open Parking Brake Switch Circuit
- Test 14A - Repairing Shorted Parking Brake Circuit
- Test 15A - Diagnosing Overhead Travel Information SYS (OTIS)
- Test 15B - OTIS Screen Blank
- Test 15C - Testing OTIS Switches
- Test 15D - Testing OTIS Mileage & Distance Functions
- Test 15E - Repairing OTIS Ambient Temperature Sensor
- Test 26A - Diagnosing Wiper System Problems
- Test 26B - Repairing Wiper Switch, Controller & Power Supply
- Test 26C - Wiper Switch Mode Sense Circuit
- Test 26D - Wiper Motor Output Circuit Short
- Test 27A - Repairing Low Speed (On/Off) WPR MTR RLY & CNTRLS
- Test 28A - Inoperative Wiper Motor Low Speed
- Test 29A - Wiper Switch Power Supply
- Test 30A - Wiper Switch Power Supply Short To Ground
- Test 31A - Wiper Motor High Speed Operation
- Test 31B - Wiper Motor Does Not Shut Off
- Test 32A - Wiper Motor Low Speed Operation
- Test 32B - Wiper Motor Does Not Switch Between High & Low
- Test 32C - Wiper Motor Does Not Switch Between High & Low
- Test 32D - Wiper Motor Low Speed Operation
- Test 33A - Wiper Motor Intermittent Speed Operation
- Test 33B - Wiper Motor On/Off Wiper Relay Control Circuit
- Test 33C - Open Park Switch Sense Circuit
- Test 33D - Wiper Motor Control Circuit
- Test 33E - Windshield Wiper Switch Signal Circuit
- Test 34A - Washer Pump Operation
- Test 34B - Washer Pump Controls
- Test 35A - Auto Door Lock Problem
- Test 35B - Repairing Doors Fail To LCK & UNLCK From Any SW
- Test 35C - Repairing Doors Fail To LCK & UNLCK From Any SW
- Test 35D - One Door Fails To Lock & Unlock From Any SW
- Test 35E - All Doors Fail To Lock & Unlock From One SW
- Test 35F - Repairing Doors Fail To Lock From Any Switch
- Test 35G - Repairing Shorted Door Lock Switch Circuit
- Test 35H - Repairing Doors Fail To Unlock From Any Switch
- Test 35J - Repairing Inoperative Door Lock Inhibit Circuit
- Test 35K - Diagnosing Automatic Speed Sensitive Door Locks
- Test 36A - Power Door Lock & Remote Keyless Entry Problem Id
- Test 36B - Repairing LF Door Fails To LCK & UNLCK From Any SW
- Test 36C - Repairing Left Front Door Lock Problem
- Test 36D - LF Door Unlock Problem W/ Remote Keyless Entry
- Test 36E - All Doors (Exc Left Front) Fail To Lock & Unlock
- Test 36F - All Doors (Except Left Front) Fail To Lock
- Test 36G - All Doors (Except Left Front) Fail To Unlock
- Test 36H - Remote Keyless Entry Problem
- Test 37A - Diagnosing Message Center
- Test 38A - Repairing Fluid Lamp Circuit
- Test 38B - Inoperative Washer Fluid Lamp
- Test 39A - Door Ajar Lamp Control Circuit
- Test 40A - Diagnosing Courtesy Lamp Circuit
- Test 40B - Repairing Courtesy Lamp System & Power Supply
- Test 41A - Repairing One Inoperative Courtesy Lamp
- Test 42A - Repairing Courtesy Lamp Inputs
- Test 43A - Repairing Left Front Door Ajar Circuit
- Test 43B - Repairing Right Front Door Ajar Circuit
- Test 43C - Repairing Left Rear Door Ajar Circuit
- Test 43D - Repairing Right Rear Door Ajar Circuit
- Test 43E - Open Courtesy Lamp Switch Circuit
- Test 44A - Shorted Left Front Door Ajar Circuit
- Test 45A - Shorted RF, RR, & LR Door Ajar CKT
- Test 46A - Shorted Courtesy Lamp Switch Circuit
- Test 47A - Inoperative Illuminated Entry
- Test 47B - Identifying Vehicle Headlamp System
- Test 48A - Diag Headlamp Delay Problems (W/O Auto Headlamps)
- Test 48B - Headlamps Will Not Turn Off
- Test 49A - Headlamp Time Delay Will Not Turn On
- Test 49B - Headlamp Time Delay Will Not Turn On
- Test 50A - Headlamp Time Delay Will Not Turn On
- Test 51A - Identifying Key-In Lamp Problems
- Test 51B - Repairing Inoperative Key-In Lamp
- Test 51C - Repairing Key-In Lamp On Constantly
- Test 52A - Diagnosing Chime System
- Test 52B - Repairing Chime Inoperative At All Times
- Test 52C - Repairing Chime Inoperative With External Lamps On
- Test 52D - Repairing Chime Inoperative W/ Seat BLT Unfastened
- Test 53A - Repairing BCM No Response Condition
- Test 54A - Testing Fused Ignition SW Output To BCM
- Test 55A - Headlamp SYS Problem Id (W/ Auto Headlamp SYS)
- Test 55B - Headlamp & PRKNG Lamps Inoperative In Auto Mode
- Test 55C - Repairing Headlamps Inoperative In Auto Mode
- Test 55D - Repairing Parking Lamps Inoperative In Auto Mode
- Test 55E - Headlamps & Parking Lamps Do Not Turn Off
- Test 55F - Parking Lamps Will Not Turn Off
- Test 55G - Repairing Auto Headlamp Sun Sensor Input Circuit
- Test 56A - Repairing PWRTRAIN CNTRL Mod No Response Condition
- Test VER-1 - Verification Procedure
- Vehicle Communications Tests
- Notes
- Test 1A - Trouble Codes
- Test 2A - Blank DRB Message Screen
- Test 3A - Ram Test Failure
- Test 4A - Cartridge Error
- Test 5A - Key Pad Test Failure
- Test 6A - Low Or High Battery
- Test 7B - Short To Battery
- Test 7C - Short To Battery
- Test 7E - Short To Battery
- Test 7G - Short To Battery
- Test 7H - Short To Battery
- Test 8B - Short To 5 Volts
- Test 8E - Short To 5 Volts
- Test 8F - Short To 5 Volts
- Test 8H - Short To 5 Volts
- Test 9B - Short To Ground
- Test 11A - No Termination
- Test 11C - No Termination
- Test 12A - Bus Bias Level Or Bus (+/-) Open
- Test 12C - Bus Bias Level Or Bus (+/-) Open
- Test 13A - No Bus Bias
- Test 13C - No Bus Bias
- Test VER-1 - Verification Procedure
- Wiring Diagrams
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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.