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Home >> Volvo >> 1983 >> 242 DL, Standard >> Repair and Diagnosis >> Engine Performance >> System >> BOSCH LH-JETRONIC - Engine Control System >> Diagnosis & Testing >> Air Control Valve
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Air Control Valve

  1. Connect ohmmeter between fuel pump relay terminal 87 and electronic control unit connecter terminal 10. Then connect ohmmeter between same fuel pump relay terminal and electronic control unit connecter terminal 23. Resistance should be about 20 ohms for both connections.
  2. If not, replace fuel pump relay and repeat test. If resistance is still not correct, repair short or open circuit.
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