6 - 17 FUEL INJECTION SYSTEM FI FI Fault code No. 16 Symptom Stuck throttle position sensor 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 the installed area for looseness or pinching. • Check that the throttle position sensor is installed in the speci- fied position. Refer to “CHECKING AND ADJUSTING THE THROTTLE POSITION SENSOR”. Reinstated by starting the engine, operat- ing it at idle, and then racing it. 2 Defective throttle position sensor. • Execute the diagnostic monitor- ing mode. (Code No.D01) • Replace if defective.
Refer to “CHECKING AND ADJUSTING THE THROTTLE POSITION SENSOR”. Fault code No. 21 Symptom Coolant temperature sensor: open or short circuit detected. Diagnostic code No. D06 Coolant temperature sensor Order Item/components and probable cause Check or maintenance job Reinstatement method 1 Installed condition of coolant tem- perature sensor. Check the installed area for loose- ness or pinching. Turning the main switch to “ON”. 2 Connections • Coolant temperature sensor cou- pler • Main wire harness-ECU coupler • Check the coupler for any pins that may have 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 coolant temperature sensor coupler and ECU cou- pler. (black/blue–black/blue) (green/yellow–green/yellow) 4 Defective coolant temperature sensor. • Execute the diagnostic mode. (Code No.D06) • Replace if defective. Refer to “SIGNALING SYSTEM” in chapter 9.