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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSPLYMOUTH1990LASER RS, 2.0 R, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - TESTS W/CODES - 1.8L
1990 Plymouth Laser RS, 2.0 R, Standard
Engine Controls - Tests W/Codes - 1.8L
1990 Plymouth Laser RS, 2.0 R, StandardSECTION Engine Controls - Tests W/Codes - 1.8L
- Introduction
- System Diagnosis
- "Hard Failures"
- "Intermittent Failures"
- Diagnostic Procedure
- Entering On-Board Diagnostics
- Check Engine Light Diagnostic Mode
- DRB-II Diagnostic Mode
- DRB-II Error Screens
- Clearing Codes
- Summary
- Code Charts
- No Start Tests
- DRIVEABILITY Tests
- Dr-1: Fault Code Check
- Dr-2: Checking Oxygen Sensor
- Dr-3: Checking Airflow Sensor
- Dr-4: Checking Intake Air Temp Sensor
- Dr-5: Checking Throttle Position Sensor (TPS)
- Dr-6: Testing ISC Motor Position Sensor
- Dr-7: Checking Coolant Temperature Sensor (Cts)
- Dr-8: Checking Crank Angle Sensor
- Dr-9: Checking Top Dead Center Sensor
- Dr-10: Checking Vehicle Speed Sensor
- Dr-11: Checking Barometric Pressure Sensor
- Dr-12: Checking Injector Circuit
- Dr-13: Checking Fuel Pump Control Circuit
- Dr-14: Testing EGR Temperature Sensor Circuit (CALIF.)
- Dr-15: No-Fault Code Test, DRB-II ATM Not Running Test
- Dr-16: No-Fault Code Test, DRB-II Switches Not Running Test
- Dr-17: No-Fault Code Test, DRB-II Sensor Test
- Dr-18: No-Fault Code Mechanical Test
- Verification Tests
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.