Component Test
- Ignition OFF, remove the MAP sensor.
- Install a 3A fused jumper wire between the 5-volt reference terminal C of the sensor and 5 volts.
- Install a jumper wire between the low reference terminal A of the sensor and ground.
- Install a jumper wire at terminal B of the MAP sensor.
- Connect a DMM between the jumper wire from terminal B of the MAP sensor and ground.
- 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 B and the low reference terminal A. the voltage should vary between 4.9-0.04 volts, without any spikes or dropouts.
- If the voltage is not within the specified range or is erratic, replace the MAP sensor.
IMPORTANT:
You must perform the Circuit/System Testing before proceeding with the circuit/system testing.