Mitsubishi FUEL Manual page 263

INSPECTION PROCEDURE 3
The engine warning lamp does not illuminate right after
the ignition switch is turned to the ON position.
Because there is a burnt-out bulb, the engine-ECU <M/T> or engine-A/T-ECU <A/T>
causes the engine warning lamp to illuminate for five seconds immediately after the
ignitionswitch isturnedtoON.If theenginewarninglampdoesnotilluminateimmediately
after the ignition switch is turned to ON, one of the malfunctions listed at right has
probably occurred.
MUT-II Data list
16 engine-ECU (engine-A/T-ECU) power supply voltage (Refer
to P.13I-98.)
OK
Measure at the engine-ECU connector C-165 <M/T> or engine-A/T-
ECU connector C-177 <A/T>.
D Disconnect the connector, and measure at the harness side.
D Earth the terminal No. 31 <M/T> or 22 <A/T>.
OK: The engine warning lamp illuminates.
NG
NG
Check a burnt-out bulb.
OK
Measure at the combination meter connector D-03.
D Disconnect the connector, and measure at the harness side.
D Voltage between 4 and earth (Ignition switch: ON)
OK: System voltage
OK
Check the following connectors:
D-03, C-90, C-165 <M/T>, C-177 <A/T>
OK
Check trouble symptom.
INSPECTION PROCEDURE 4
The engine warning lamp remains illuminating and never
goes out.
In cases such as the above, the cause is probably that the engine-ECU <M/T> or
engine-A/T-ECU <A/T> is detecting a problem in a sensor or actuator, or that one
of the malfunctions listed at right has occurred.
MUT-II Self-Diag code
Are diagnosis codes displayed?
Measure at the combination meter connector D-03.
D Disconnect the connector, and measure at the harness side.
D Disconnect the engine-ECU
engine-A/T-ECU connector <A/T>
D Continuity between 16 and earth
OK: No continuity
Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.
GDI -
Replace
No
connector <M/T> or
OK
Troubleshooting
Probable cause
D Burnt-out bulb
D Defective warning lamp circuit
D Malfunction of the engine-ECU <M/T>
D Malfunction of the engine-A/T-ECU <A/T>
NG
Check the engine-ECU (engine-A/T-ECU) power supply and earth
circuit system.
(Refer to P.13I-89, INSPECTION PROCEDURE 25.)
OK
Check the following
connectors: C-165
<M/T>, C-177 <A/T>
OK
Check trouble symptom.
NG
Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.
NG
Check the engine warning lamp power supply circuit, and repair
if necessary.
NG
Repair
NG
Check the harness wire between combination meter and engine-
ECU <M/T> or engine-A/T-ECU <A/T>, and repair if necessary.
Probable cause
D Short-circuit between the engine warning lamp and
engine-ECU
D Malfunction of the engine-ECU <M/T>
D Malfunction of the engine-A/T-ECU <A/T>
Yes
Refer to P.13I-11, INSPECTION CHART FOR DIAGNOSIS
CODES.
NG
Check the harness wire between combination meter and engine-
ECU <M/T> or engine-A/T-ECU <A/T> connector, and repair if
necessary.
13I-69
NG
Repair