2005-2008 Honda ATV TRX500FA/FGA Fourtrax, Rubicon Factory Service Manual, Page 496Get this manual
HONDAMATIC PROBLEM CODE 4: THROTTLE POSITION (TP) SENSOR SYSTEM 1TP Sensor Connection Inspection Check for loose or poor contact on the ECM 21P (Gray) connectorECM 21P (GRAY) CONNECTOR
'05, '06 shown: Check for loose or poor contact on the TP sensor 3P (Black) connectorIs there normal condition? NO Loose or poor contact on the ECM 21P (Gray) connector and the TP sensor 3P (Black) connector YES GO TO STEP 2
3P (BLACK) CONNECTOR 2TP Sensor Resistance Inspection Measure the resistance at the TP sensor terminals of the sensor sideConnection: Blackred (+) Greenyellow () Is the resistance within 4.0 6.0 NO (20C68F)?