2009 Suzuki 400 LTZ Quad Sport Service Manual, Page 257Get this manual
1H-6 Ignition System:
CKP Sensor Inspection
Refer to "Electrical Components Location in Section 0A (Page 0A-7)"
B933H21806004
CKP Sensor Peak Voltage 1) Remove the ignition switch and connect the ignition switch couplerRefer to "Ignition Switch Removal and Installation (Page 1H-7)"2) Disconnect the CKP sensor coupler (1)NOTE Be sure that all of the couplers are connected properly and the battery is fully-charged
b) Press the starter button and allow the engine to crank for few seconds, and then measure the CKP sensor peak voltage5) Repeat the b) procedure few times and measure the highest CKP sensor peak voltageCKP sensor peak voltage 1.0 and more (Blue Green) 6) If the peak voltage is within the specification, check the continuity between the CKP sensor coupler and ECM coupler
CAUTION
Normally, use the needle pointed probe to the backside of the lead wire coupler to prevent the terminal bend and terminal alignment7) After measuring the CKP sensor peak voltage, reinstall the removed partsCKP Sensor Resistance 1) Disconnect the CKP sensor coupler (1)