Operation Manual

FUEL INJECTION SYSTEM
8-43
Fault code No. 15
Item
Throttle position sensor: open or short circuit detected. (no normal
signals are received from the throttle position sensor.)
Fail-safe system
Under certain conditions
Under certain conditions
Diagnostic code No. d:01
Meter display
Throttle position sensor
• 14–20 (fully closed position)
• 97–107 (fully open position)
Procedure
• Check with throttle valves fully closed.
• Check with throttle valves fully open.
Item/components and
probable cause
Check or maintenance job
Sensor inspection proce-
dure
1 Connection of throttle posi-
tion sensor coupler
Check the connection of the
coupler is secure.
Disconnect the coupler, and
check each pin (for bending,
wear, or locking).
Poor connection → Connect it
securely, or repair/replace the
wire harness.
Place the main switch to the
ON position, and check the
fault code indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.
2 Connection of wire harness
ECU coupler
Check the connection of the
coupler is secure.
Disconnect the coupler, and
check each pin (for bending,
wear, or locking).
Poor connection → Connect it
securely, or repair/replace the
wire harness.
Place the main switch to the
ON position, and check the
fault code indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.
3 Connection of throttle posi-
tion sensor sub-wire harness
coupler
Check the connection of the
coupler is secure.
Disconnect the coupler and
check each pin (for bending,
wear, or locking).
Poor connection → Connect it
securely, or repair/replace the
wire harness.
Place the main switch to the
ON position, and check the
fault code indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.
4 Continuity of wire harness Open or short circuit →
Replace the wire harness.
Black/blue–Black/blue
Yellow–Yellow
Blue–Blue
Place the main switch to the
ON position, and check the
fault code indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.
5 Sensor installation status Check for loose mounting,
pinched mounting, or hard
mounting.
Make sure that the mounting
position is correct.
Refer to “ADJUSTING THE
THROTTLE POSITION SEN-
SOR” on page 7-9.
Place the main switch to the
ON position, and check the
fault code indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.