Mitsubishi Electric Lancer Evolution-VII Workshop Manual page 564

Code No.43 SRS warning lamp drive circuit system (lamp
does not illuminate)
This code is output when open circuit has occurred in the SRS warning lamp
drive circuit for 5 seconds or more. However, if the code is output due to open
circuit faulty, code No.43 is automatically erased and the SRS warning lamp
functions normally as soon as a normal operation is resumed.
Check the SRS warning lamp.
D Connect the negative (- ) terminal of the battery
D Ignition switch: ON
D Does the lamp illuminate when the SRS-ECU connector C-21 is
disconnected?
OK: Lamp illuminates.
OK
Check the harness between the SRS-ECU and the
ignition switch IG
1
.
OK
Replace the SRS-ECU.
Code No.43 SRS warning lamp drive circuit system
(Lamp does not go out)
Harness between SRS warning lamp and SRS-ECU is being shorted to earth
However, once trouble is extinguished, this code will be automatically erased,
and SRS warning lamp will go out.
Check the SRS warning lamp.
D Connect negative (–) battery
terminal.
D Ignition switch: ON
D Does lamp go out when
combination meter connector
C-02 is disconnected?
NO
Replace combination meter.
Code No.44 SRS warning lamp drive circuit system
Short is present in SRS warning lamp drive circuit, or output transistor in
SRS-ECU is defective.
However, once trouble is extinguished, this code will be automatically erased,
and SRS warning lamp will go out.
Check the SRS warning lamp drive circuit system.
(Refer to P.52B-33.)
SRS -
Troubleshooting
NG
NG
Correct
YES
Check the following connectors: C-02,
C-21
Check trouble symptoms.
OK
Possible Cause
D Harness or connector fault
D Bulb fault
D SRS-ECU inoperable
D Combination meter fault
Check the bulb.
OK
Check connector: C-21, C-213, C-29, C-01, C-02
OK
Check the trouble symptoms.
NG
Check the harness between the SRS-ECU, the combination
meter, and the ignition switch IG
OK
Replace the combination meter.
Probable cause
D Harnesses or connector fault
D SRS-ECU inoperable
D Combination meter fault
NG
OK
NG
NG
Check the wiring harness between
SRS-ECU and combination meter
Replace the SRS-ECU.
Probable cause
D Harnesses or connector fault
D SRS-ECU inoperable
Replace the SRS-ECU.
52B-33
NG
Correct
NG
Correct
1.
NG
Correct
Repair
.
NG
OK
Repair