2008 Arctic Cat ThunderCat ATV Service Manual, Page 105Get this manual
3Locate the diagnostic connector under the seat next to the PDM; then install the test plug from Test PlugError Code List onto the connector4Turn the ignition switch to the ON position and note the position of the TPS indicator icon (A, B, or C); then adjust the TPS until the TPS icon appears in the center position (B) FI454A