6 - 16 FUEL INJECTION SYSTEM FI FI Fault code No. 15 Symptom Throttle position sensor: open or short circuit detected. Diagnostic code No. D01 Throttle position sensor Order Item/components and probable cause Check or maintenance job Reinstatement method 1 Installed condition of throttle posi- tion sensor. • Check for looseness or pinching. • Check that the sensor is installed in the specified position. Turning the main switch to “ON”. 2 Connections • Throttle position sensor coupler • Main wire harness-ECU coupler • Check the coupler for any pins that may be pulled out. • Check the locking condition of the coupler. • If there is a malfunction, repair it and connect the coupler securely.
3 Open or short circuit in wire har- ness. • Repair or replace if there is an open or short circuit. • Between throttle position sensor coupler and ECU coupler (blue–blue) (yellow–yellow) (black/blue–black/blue) 4 Throttle position sensor lead wire open circuit output voltage check. • Check for open circuit and replace the throttle position sen- sor. (yellow–black/blue) 5 Defective throttle position sensor. • Execute the diagnostic mode. (Code No.D01) • Replace if defective. Refer to “CHECKING AND ADJUSTING THE THROTTLE POSITION SENSOR”.