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FUEL INJECTION SYSTEM
Code No. 15 Symptom Throttle position sensor - open or short circuit detected.
Used diagnostic code No. 01 (throttle position sensor)
Inspection operation item and probable cause Operation item and countermeasure Reinstatement
method
Defective throttle position sensor. Replace if defective.
Refer to “FUEL INJECTION SYSTEM” in
chapter 8.
Reinstated by turn-
ing the main switch
ON.
Throttle position sensor lead wire open circuit
output voltage check
(B/L - Y)
Black/Blue - Yellow
Open circuit item: Output voltage
Ground wire open circuit: 5 V
Output wire open circuit: 0 V
Power supply wire open circuit: 0 V
Check for open circuit and replace the throttle
position sensor.
Open or short circuit in wiring harness or sub
lead.
Repair or replace if there is an open or short
circuit.
Main wiring harness
Black/Blue - Black/Blue
Yellow - Yellow
Blue - Blue
Sub lead
Black/Blue - Black/Blue
Yellow - Yellow
Blue - Blue
Installed state of throttle position sensor. Check the installed area for looseness or
pinching.
Check that it is installed in the specified posi-
tion.
Refer to “FUEL INJECTION SYSTEM” in
chapter 8.
Connected state of connector
Inspect 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 it
securely.
Throttle position sensor coupler
Main wiring harness ECU coupler