Mitsubishi FUEL Manual page 110

13A-110
From the previous page
OK
Measure at throttle position sensor
connector B-07.
D Use test harness (MB991536) to
connect the connector, and
measure at the pick-up harness.
D Ignition switch: ON
(1) Voltage between terminal 4 and
earth
OK: 4.8 - 5.2 V
(2) Voltage between terminal 3 and
earth
OK: Accelerator pedal fully re-
leased: 0.3 - 1.0 V
Accelerator pedal fully de-
pressed: 4.5 - 5.5 V
(3) Voltage between terminal 1 and
earth
OK: 0.5 V or less
OK
Measure at engine-ECU connector
C-166.
D Measure voltage at the
engine-ECU connector terminals.
D Ignition switch: ON
D Voltage between terminal 78 and
earth
OK: Accelerator pedal fully re-
leased: 0.3 - 1.0 V
Accelerator pedal fully de-
pressed: 4.5 - 5.5 V
NOTE:
*: Refer to the '97 GALANT Workshop Manual (Pub. No. PWDE9611).
Code No. P0125 Feedback system
Range of Check
D The engine coolant temperature is approx. 80_C or more.
D During stoichiometric feedback control
D The vehicle is not being decelerated.
Set Conditions
D Right bank oxygen sensor (front) output voltage has been higher or lower
than 0.5 V for at least thirty seconds.
D Left bank oxygen sensor (front) output voltage has been higher or lower than
0.5 V for at least thirty seconds.
MPI <6A1> -
(1) NG
Check the following connector:
(3) NG
C-167
Check the harness wire between the
throttle position sensor and the
engine-ECU, and repair if necessary.
(2) NG
Adjust the throttle position sensor.
(Refer to P.13A-184*.)
Check the following connector:
C-166
Check the harness wire between the
throttle position sensor and the
engine-ECU, and repair if necessary.
NG
Check the following connector:
C-166
Check the harness wire between the
throttle position sensor and the
engine-ECU, and repair if necessary.
OK
Check the following connector:
C-166
Check the trouble symptoms.
Replace the engine-ECU.
Troubleshooting
NG
OK
NG
OK
NG
OK
NG
OK
NG
Probable cause
D Malfunction of oxygen sensor (front)
D Open or short circuit in the right bank oxygen
sensor (front) circuit or loose connector contact
D Open or short circuit in the left bank oxygen
sensor (front) circuit or loose connector contact
D Malfunction of engine-ECU
Repair
Repair
Repair
Repair