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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. 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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