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 MANUALSVOLVO1987760 TURBO, 4D SEDAN, AW71LREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMFUEL INJECTION SYSTEM - BOSCH LH (NON TURBO)TESTINGINJECTOR CIRCUITS
1987 Volvo 760 Turbo, 4D Sedan, AW71L
Injector Circuits
1987 Volvo 760 Turbo, 4D Sedan, AW71LSECTION Injector Circuits
- On 2.3L models, turn ignition off. Connect an ohmmeter between pump relay terminal No. 87 and ECU terminal No. 13. Correct resistance should be approximately 4 ohms.
- On 2.8L models, turn ignition off. Connect an ohmmeter between control unit terminal No. 13 and terminal No. 9 of 25-terminal connector. Correct resistance should be approximately 2.6-2.7 ohms.
- On 2.3L models, if meter shows approximately 5.3 ohms, either an injector or injector wire is defective. If meter reads approximately 8 ohms, 2 injectors or injector wires are defective. If meter shows 16 ohms, 3 injectors or injector wires are defective.
- On 2.8L models, if meter shows approximately 3.2 ohms, either an injector or injector wire is defective. If meter reads approximately 4 ohms, 2 injectors or injector wires are defective. If meter shows 5.3 ohms, 3 injectors or injector wires are defective.
- On all models, injectors may be tested separately. Each injector should have a resistance of 16 ohms.
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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.