2006-2008 Yamaha Snowmobiles Apex/Attak Factory Service Manual, Page 405Get this manual
FUEL INJECTION SYSTEM
Fault code No13 Symptom Intake air pressure sensor open or short circuit detectedUsed diagnostic code No03 (intake air pressure sensor) Order Inspection operation item and probable Operation item and countermeasure cause Connected condition of connector If there is malfunction, repair it and connect it Inspect the coupler for any pins that securelymay have pulled outIntake air pressure sensor coupler Check the locking condition of the Main wiring harness ECU coupler couplerSub-wire harness coupler Open or short circuit in wiring harness Repair or replace if there is an open or short circuitandor sub leadBetween sensor coupler and ECU coupler BlackBlue BlackBlue PinkWhite PinkWhite Blue Blue Defective intake air pressure sensor Execute the diagnostic monitoring mode (Code No.03)Replace if defective1Connect the pocket tester (DC 20 V) to the intake air pressure sensor coupler terminal as shownTester positive probe Tester negative probe pinkwhite blackblue