Service manual

FUEL INJECTION SYSTEM
8-69
Fault code No. 47 Symptom
Sub-throttle position sensor:open or short circuit
detected.
Diagnostic monitor-
ing code No.
56 Sub-throttle servo motor
Order
Item/components and probable
cause
Check or maintenance job
Reinstatement
method
1
Installed state of sub-throttle position
sensor.
• Check for looseness or pinch-
ing.
• Check that the sensor is
installed in the specified posi-
tion.
Turning the
main switch to
“ON”.
2
Connections
• Sub-throttle position sensor coupler
• Main wire harness ECU coupler
• Sub-wire harness coupler
• Check the couplers for any pins
that may be pulled out.
• Check the locking condition of
the couplers.
• If there is a malfunction, repair it
and connect the coupler
securely.
3
Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between sub-throttle position
sensor coupler and ECU cou-
pler.
(Black/Blue–Black/Blue)
(Green/Yellow–Green/Yellow)
(Blue–Blue)
4
Defective sub-throttle position sensor. • Execute the diagnostic mode.
(Code No. 56)
• Replace if defective.
Refer to "CHECKING THE
SUB-THROTTLE POSITION
SENSOR" on page 8-97.