DR-2B MAP Sensor Circuit In Logic Module

1. With ignition switch in Off position, remove MAP sensor from logic module.
2. Disconnect MAP sensor electrical connector, then connect negative lead of a digital voltmeter to electrical connector terminal with black wire.
3. Place ignition switch in Run position, then contact positive lead of voltmeter to MAP sensor electrical connector terminals with white and red wires.
4. If voltmeter reads at least 4 volts at both red and white wire, replace MAP sensor.
5. If voltmeter indicates no voltage at either or both red and white wires, replace logic module.