The Hazard Warning Lamps Do Not Light Up - Mitsubishi Electric Lancer Evolution-VII Workshop Manual

54B-24
Inspection Procedure H-1
The turn signal lamp do not light.
The ETACS-ECU controls the turn signal lamps based on input signals from the
following switches.
D Ignition switch (IG1)
D Turn signal lamp left-hand switch
D Turn signal lamp right-hand switch
If none of the turn signal lamps are operating normally, either one of the above
input circuit systems or the ETACS-ECU may be defective.
Are the hazard warning lamps lighting up normally?
Measure at ETACS-ECU connector C-226.
D Disconnect the connector and test on the junction box
side.
D Voltage between terminal 11 and the body earth.
OK : System voltage
Replace ETACS-ECU.
NOTE
If only one of the turn signal lamps is not lighting, check the bulb and the harness between the ETACS-ECU
and the lamp, and between the lamp and the body earth.
Inspection Procedure H-2

The hazard warning lamps do not light up.

The ETACS-ECU controls the hazard warning lamps based on input signals from
the hazard warning lamp switch.
If the hazard warning lamps are not operating normally, either the hazard
warning lamp switch input circuit system or the ETACS-ECU may be defective.
Are the turn signal lamps operating normally?
Do all of the following functions operate when the ignition
switch is in the LOCK (OFF) position?
D Lights left ON reminder warning function
D Central locking
Check the MUT-II input signals.
D Hazard lamp switch
Replace ETACS-ECU.
SWS - SWS -
NO
OK
YES
OK
OK
Troubleshooting Troubleshooting
Probable cause
D Column switch fault
D ETACS-ECU fault
D Harness or connector fault
YES
Check the MUT-II input signals.
D Ignition switch (IG1)
D Turn signal lamp left-hand switch
D Turn signal lamp right-hand switch
OK
Replace ETACS-ECU.
NG
Check the following connectors: C-226, C-209, C-135
OK
Check the trouble
symptoms.
NG
Check the harness between the ETACS-ECU and the battery,
and repair if necessary.
Probable cause
D Hazard warning lamp switch fault
D ETACS-ECU fault
D Harness or connector fault
NO
Check the turn signal lamps (Refer to P.54B-24, Inspection
Procedure H-1).
NG
Check ETACS-ECU battery power circuit system (Refer to
P.54B-33, Inspection Procedure K-1).
NG
Check the hazard lamp switch input circuit (Refer to P.54B-27,
Inspection Procedure J-3).
NG
Check the defective
input circuit. (Refer to
P.54B-8, Defects Found
by Input Signal Check).
NG
Repair