The Tail Lamps Do Not Work - Mitsubishi Electric Lancer Evolution-VII Workshop Manual

54B-20
Inspection Procedure F-1
Except for lighting switch "OFF" the headlamps only
respond to the "low-beam" position.
If the headlamps only go onto low-beam regardless of the switch position, the
headlamp fail - safe function is probably activated.
MUT-II diagnosis code
When the ignition switch is in the LOCK (OFF) position, is the
diagnosis code output?
Replace front-ECU.
Inspection Procedure F-2

The tail lamps do not work.

If none of the tail lamps light up, either the tail lamp switch input circuit system
or the front-ECU may be defective.
MUT-II diagnosis code
When the ignition switch is in the LOCK (OFF) position, is the
diagnosis code output?
Check the MUT-II input signals.
D Tail lamp switch
Measure at the front - ECU connector A-10X.
D Disconnect the connector and test on the relay box side.
D Voltage between terminal 5 and the body earth.
OK : System voltage
Replace front-ECU.
NOTE
If only one of the tail lamps fails to light up, check the bulb and the harness between the front-ECU
and the lamp, and between the lamp and body earth.
SWS -
NO
NO
OK
OK
Troubleshooting
Probable cause
D Column switch fault
D front-ECU fault
D Harness or connector fault
YES
Diagnosis Code Chart (Refer to P.54B-3).
Probable cause
D Column switch fault
D front-ECU fault
D Harness or connector fault
YES
Diagnosis Code Chart (Refer to P.54B-3).
NG
Check the tail lamp switch input circuit system (Refer to
P.54B-31, Inspection Procedure J-7).
NG
Check the following connector: A-10X
OK
Check the trouble
symptoms.
NG
Check the harness between the front - ECU and the battery,
and repair if necessary.
NG
Repair