Mitsubishi FUEL Manual page 251

Code No. P1221 Throttle valve position feedback
system
The throttle valve controller judges a malfunction, and then transmit the result to
the engine-ECU <M/T> or engine-A/T-ECU <A/T>.
Range of Check
D Ignition switch: ON
D Battery voltage: 10 V or more
Set Conditions
D Failure in the motor position feedback
(The engine-ECU <M/T> or engine-A/T-ECU <A/T> detects that the current in
the motor is excessive and the opening angle difference between the target
value of throttle position sensor (1st channel) and the actual value of throttle
position sensor (1st channel) is 1.0 V or more)
MUT-II Self-Diag Code
Is code No. P0120 set?
MUT-II Self-Diag Code
Is Code No. P1224 set?
MUT-II Self-Diag Code
Is Code No. P1228 set?
Adjust the throttle position sensor. (Refer to P.13I-98*.)
Check the throttle valve control servo. (Refer to P.13I-112*.)
Check the following connectors: B-07, C-160
Check the harness wires between the throttle position sensor
and the throttle valve controller, and between the throttle valve
control servo and the throttle valve controller.
Check the trouble symptoms.
Replace the throttle valve controller.
NOTE:
*: Refer to the '99 GALANT Workshop Manual (Pub. No. PWDE9611-A)
GDI -
NO
NO
NO
OK
OK
NG
OK
NG
Troubleshooting
Probable cause
D Malfunction of throttle position sensor (1st channel)
D Open or short circuit in the throttle position sensor
(1st channel) circuit or loose connector contact
D Malfunction of the throttle valve controller
YES
Refer to Code No. P0120, Throttle position sensor (1st
channel) system (Refer to P.13I-21.)
YES
Refer to Code No. P1224, Throttle valve control servo motor
(motor 1st phase malfunction) system (Refer to P.13I-59.)
YES
Refer to Code No. P1228, Throttle valve control servo motor
(motor 2nd phase malfunction) system (Refer to P.13I-62.)
NG
Replace the throttle body assembly.
NG
Repair
NG
Repair
13I-57