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 MANUALSPLYMOUTH1990LASER RS, 2.0 R, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES - 2.0LDRB-II DIAGNOSTIC MODEINTRODUCTION
1990 Plymouth Laser RS, 2.0 R, Standard
DRB-II Diagnostic Mode: Introduction
1990 Plymouth Laser RS, 2.0 R, StandardSECTION Introduction
- Turn ignition off. Attach DRB-II Tester (C-4805) and Mitsubishi Adapter (MM1000) to diagnostic connector. Diagnostic connector is located next to a junction block above left kick panel. See Figure .
- Ensure all accessories are off. Turn ignition on. All character positions will illuminate and copyright information will appear on screen for a few seconds. If DRB-II screen is blank, refer to DRB-II PROBLEMS & ERROR MESSAGES in this article. The DRB-II will offer 4 menus: VEHICLES SUPPORTED, HOW TO USE, CONFIGURE DRB-II and SELECT VEHICLE.
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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.