FUEL INJECTION SYSTEM
8-49
Fault code No. 15 Symptom Throttle position sensor: open or short circuit detected.
Diagnostic code No. 01 Throttle position sensor
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 Installed condition of throttle position
sensor.
• Check for looseness or pinch-
ing.
• Check that the sensor is in-
stalled in the specified position.
Turning the
main switch to
“ON”.
2 Connections
• Throttle position sensor coupler
• 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 se-
curely.
3 Open or short circuit in wire harness. • 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 open cir-
cuit output voltage check.
• Check for open circuit and re-
place the throttle position sen-
sor.
(black/blue–yellow)
Open circuit
item
Output voltage
Ground wire
open circuit
5 V
Output wire
open circuit
0 V
Power supply
wire open cir-
cuit
0 V
5 Defective throttle position sensor. • Execute the diagnostic mode.
(Code No. 01)
• Replace if defective.
Refer to “CHECKING THE
THROTTLE POSITION SEN-
SOR” on page 8-101.
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