DR-2B MAP Sensor From Logic Module

1. Place ignition switch in the Off position, then remove MAP sensor from logic module and disconnect electrical connector.
2. Connect negative lead of voltmeter to MAP sensor electrical connector black wire.
3. Place ignition switch in Run position.
4. Contact position lead of voltmeter to red and white wires of MAP sensor electrical connector and note voltmeter reading.
5. If voltmeter reading is at least 4 volts at both the red and white wires, replace MAP sensor.
6. If voltmeter indicates no voltage either or both wires, replace logic module.