Mitsubishi Lancer Evolution 7. Manual — part 366
SRS -
Troubleshooting
52B-29
Code No.34 Connector Lock System
Probable Cause
The SRS-ECU connector is mounted with a connector lock switch terminal for
detecting the connected state of the connector.
SRS-ECU connector is poorly connected.
However, when the vehicle condition returns to normal, this code will be
automatically erased, and the SRS warning lamp will go out.
D
Faulby connector
D
SRS-ECU inperable
NO
Is the SRS-ECU connector C-21 connected properly?
Replace the SRS-ECU.
Correct
YES
OK
Correct the connector connection.
Check trouble symptoms.
NG
NG
Check the C-21 SRS-ECU connector.
D
Disconnect the connector.
D
Check the connector lock switch terminal in the harness
side connector for contact pressure and deformation, etc.
(See Figure A.)
Is the connector lock switch terminal normal?
Connector lock switch terminal
Front view of the SRS-ECU connector
(harness side)
Figure A
Code No.35 SRS-ECU (deployed air bag) system
Probable cause
This code is displayed after deployment of air bags. If displayed before
deployment, the code indicates malfunction probably present in SRS-ECU.
D
SRS-ECU inperable
If the above-mentioned code No. is output, replace the SRS-ECU.
SRS -
Troubleshooting
52B-30
Code No.41 Power supply circuit system (fuse No.2
circuit)
Possible Cause
This codes output when the voltage between terminal IG
1
(SRS-ECU, terminal
No.16) and earth has been below the standard value for 5 seconds.
However, code No.41 is automatically erased and SRS warning lamp goes out
when a normal operation is resumed. If code No.41 and 42 are output at the
same time, check the battery first since the battery voltage may have decreased.
D
Harness or connector fault
D
SRS-ECU inoperable
<Check the circuit between the junction
block and the combination meter>
Measure at the junction block connector
C-213.
D
Disconnect the junction block connector
C-213 and measure at the harness
side.
D
Continuity check between terminal 25
and body earth
Caution
Do not directly insert a probe or
other devices at the front of the
connector to avoid a possible
decrease in the contact pressure.
OK: No continuity
<Check the circuit between the SRS-ECU and the junction
block>
Measure at the junction block connector C-213.
D
Disconnect the junction block connector C-213 and
measure at the harness side.
D
Continuity check between terminal 24 and body earth
Caution
Do not directly insert a probe or other devices at the
front of the connector to avoid a possible decrease in
the contact pressure.
OK: No continuity
NG
Correct the harness between the junction block and
combination meter (SRS warning lamp).
NG
OK
NG
NG
Check the trouble symptoms.
Correct
Check the harness between the SRS-ECU and the ignition
switch IG
1
, and repair if necessary.
Fuse is normal
NG
Fuse disconnection
Check the junction block general fuse No.2.
Fuse disconnection
Check when fuse disconnects
D
Replace the fuse.
D
Turn the ignition switch to the ON position and then turn it
to the OFF position after one minute or more has passed.
Check the fuse.
OK
OK
Replace the SRS-ECU.
<Between the SRS-ECU and the ignition switch IG
1
>
Measure at the SRS-ECU connector C-21.
D
Disconnect the SRS-ECU connector C-21.
D
Connect the negative (-) terminal of the battery
D
Ignition switch: ON
D
Measure at the harness side
D
Voltage between terminal 16 and body earth
Caution
Do not directly insert a probe or other devices at the
front of the connector to avoid a possible decrease in
the contact pressure.
OK: 9 V or more
Check the other circuits using the general fuse No.2.
(See the Electrical Wiring Diagram.)
OK
Check connector: C-21, C-213, C-210
Go to Next Page
Connector C-21
Connector C-213
Connector C-213
SRS -
Troubleshooting
52B-31
<Check the circuit between the SRS-ECU and the junction
block>
Measure at the SRS-ECU connector C-21.
D
Disconnect the SRS-ECU connector C-21 and measure at
the harness side.
D
Continuity check between terminal 16 and body earth
Caution
Do not directly insert a probe or other devices at the
front of the connector to avoid a possible decrease in
the contact pressure.
OK: No continuity
Connector C-41
OK
Check the harness between the SRS-ECU and junction block,
and repair if necessary.
Replace the SRS-ECU.
NG
NG
From Previous Page
SRS -
Troubleshooting
52B-32
Code No.42 Power supply circuit system (fuse No.3
circuit)
Possible Cause
This code is output when the voltage between terminal IG
1
(SRS-ECU, terminal
No.13) and earth has been below the standard value for 5 seconds.
However, code No.42 is automatically erased and SRS warning lamp goes out
when a normal operation is resumed.If code No.41 and 42 are output at the
same time, check the battery first since the battery voltage may have decreased.
D
Harness or connector fault
D
SRS-ECU inoperable
OK
Check the other circuits using the general
fuse No.3. (See the Electrical Wiring
Diagram.)
NG
OK
NG
NG
NG
Check connector: C-21, C-213, C-210
Check the trouble
symptoms.
Correct
Check the harness between the SRS-ECU and the ignition
switch IG
1
, and repair if necessary.
NG
Fuse disconnection
Fuse disconnection
OK
Replace the SRS-ECU.
<Check the circuit between the SRS-ECU and the ignition
switch IG
1>
Measure at the SRS-ECU connector C-21.
D
Disconnect the SRS-ECU connector C-21 and measure at
the harness side.
D
Connect the negative (-) terminal of the battery
D
Ignition switch: ON
D
Voltage between terminal 13 and body earth
Caution
Do not directly insert a probe or other devices at the
front of the connector to avoid a possible decrease in
the contact pressure.
OK: 9 V or more
OK
Check the harness between the SRS-ECU and junction block,
and repair if necessary.
<Check the circuit between the SRS-ECU and the junction
block>
Measure at the C-21 SRS-ECU connector.
D
Disconnect the SRS-ECU connector C-21 and measure at
the harness side.
D
Continuity check between terminal 13 and body earth
Caution
Do not directly insert a probe or other devices at the
front of the connector to avoid a possible decrease in
the contact pressure.
OK: No continuity
Replace the SRS-ECU.
Fuse is normal
Check the junction block general fuse No.3.
Check when fuse disconnects
D
Replace the fuse.
D
Turn the ignition switch to the ON position and then turn it
to the OFF position after one minute or more has passed.
Check the fuse.
<Check the circuit between the SRS-ECU and the junction
block>
Measure at the junction block connector C-213.
D
Disconnect the junction block connector C-213 and
measure at the harness side.
D
Continuity check between terminal 7 and body earth
Caution
Do not directly insert a probe or other devices at the
front of the connector to avoid a possible decrease in
the contact pressure.
OK: No continuity
Connector C-21
Connector C-213
Connector C-21
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