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Component Test

    IMPORTANT: You must perform the circuit/system verification before proceeding with the circuit/system testing.
  1. Ignition OFF, remove the MAP sensor.
  2. Install a 3A fused jumper wire between the 5-volt reference terminal of the sensor and 5 volts.
  3. Install a jumper wire between the low reference terminal of the sensor and ground.
  4. Ignition ON, install the J 35555  to the MAP sensor vacuum fitting. See Special Tools . Slowly apply vacuum to the sensor while monitoring the voltage between the signal terminal and the low reference terminal. the voltage should vary between 5-0 volts, without any spikes or dropouts.
    • If the voltage is not within the specified range or is erratic, replace the MAP sensor.
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