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 MANUALSVOLVO1987240 GL, 4D SEDAN, AUTOMATIC, AW70REPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISBOSCH LH-JETRONIC - ENGINE CONTROL SYSTEMDIAGNOSIS & TESTINGENGINE DOES NOT STARTB280F
1987 Volvo 240 GL, 4D Sedan, Automatic, AW70
Engine Does Not Start: B280F
1987 Volvo 240 GL, 4D Sedan, Automatic, AW70SECTION B280F
- Ensure that ground connections (BN) from control unit (ignition ECU), and power stage unit (next to left side front fender), are properly connected to intake manifold ground.
- Disconnect lead from one of the spark plugs and connect a separate spark plug to it. Ground spark plug and crank starter motor. A strong, Blue/White spark indicates engine or fuel system malfunction. If there is no spark, or if a weak spark occurs, turn off ignition.
- Connect a lead, plus spark plug, to ignition coil (HT) terminal. Ground spark plug and crank starter motor. No spark or weak spark indicates ignition system malfunction. If spark plug fires, check distributor rotor and cap, and HT leads. Replace if necessary.
RENDER: 1.0x
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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.