DR-20C Sensor Calibration MAP Sensor

1. With diagnostic read-out tool connected to engine test connector and engine cold, enter system into Sensor Test Mode 08. Display reading must be divided by ten to determine actual reading.
2. Disconnect vacuum hose from MAP sensor, then connect an auxiliary vacuum supply to the sensor.
3. Apply 5 inches Hg to sensor and record voltage reading displayed, then slowly increase vacuum to 20 inches and record reading. Subtract voltage recorded at 20 inches from that recorded at 5 inches.
4. If voltage display is un-interrupted as vacuum is increased and differential in readings if 2.3---2.9 volts, locate and repair restriction in vacuum line to MAP sensor and proceed to step D.
5. If voltage display is not as described in step 4, replace the MAP sensor.