DR-2B Checking Power Supply to MAP Sensor

1. With ignition switch in Off position, remove MAP sensor from logic module. Do not disconnect MAP sensor electrical connector.
2. Connect negative lead of voltmeter to engine ground, then place ignition switch in Run position.
3. Contact positive lead of voltmeter to red wire electrical connection at MAP sensor printed circuit board.
4. If voltmeter reads 4 volts, proceed to Test 2 step C.
5. If voltmeter indicates no voltage, replace logic module.
CAUTION: Make sure the red wire at the MAP sensor connector is okay before replacing the logic module.