Mitsubishi FUEL Manual page 253

Code No. P1224 Throttle valve control servo motor
(Motor 1st phase malfunction) system
Range of Check
D Throttle valve control servo relay: ON
D System voltage: 8 V or more.
Set Conditions
D Throttle valve control servo drive circuit is shorted to earth.
D Other power source interferences with throttle valve control servo drive
circuit.
D Throttle valve control servo drive circuit is open circuit.
Check the throttle valve control
servo (Refer to P.13A-112*.)
OK
Check the following connector:
C-160
OK
Measure at throttle valve controller
connector C-160.
D Measure voltage at the throttle
valve controller connector
terminals.
D Ignition switch: ON
D The voltage between terminal 1,
9 and earth
(Accelerator pedal: Fully open to
fully closed)
OK: The battery voltage tempo-
rarily shows a slight de-
crease.
D The voltage between terminal 14,
15 and earth
(Accelerator pedal: Fully closed
to fully open)
OK: The battery voltage show a
slight (approximately 2 V)
decrease.
OK
Check the trouble symptoms.
NG
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
NOTE:
*: Refer to the '99 GALANT Workshop Manual (Pub. No. PWDE9611-A)
GDI -
Troubleshooting
NG
Replace the throttle body assembly.
NG
Repair
NG
Check the following connector: B-97
Check the harness wire between the
throttle valve control servo and the throttle
valve controller.
Check the trouble symptoms.
Replace the throttle valve controller.
Probable cause
D Malfunction of the throttle valve control servo
D Open circuit or short-circuited harness wire in
throttle valve control servo system, or poor
connector contact
D Malfunction of the throttle valve controller
NG
OK
NG
OK
NG
13I-59
Repair
Repair