2006-2009 Suzuki LT-R450 Service Manual, Page 163Get this manual
FI SYSTEM DIAGNOSIS
Step 1) Turn the ignition switch OFF2) Remove the lAP sensor3) Connect the vacuum pump gauge to the vacuum port of the lAP sensorArrange new 1.5 batteries in series CD (check that total voltage is .55.0 V) and connect terminal to the ground terminal and CB terminal to the VCC terminal Q:l4) Check the voltage between Vout and groundAlso, check if voltage reduces when vacuum is applied up to 53 kPa (400 mmHg) by using vacuum pump gauge(c::::74-36)
n'OOti 09917-47011:
Vacuum pump gauge 09900-25008: Multi-circuit tester set Tester knob indication: Voltage (=-=-=)