
SRS –
Troubleshooting
52B-10
Code No.34 Connector lock system
Probable cause
This diagnosis code is output if a poor connection of the SRS-ECU is detected. However,
if the vehicle condition returns to normal, diagnosis code No.34 will be automatically
erased, and the SRS warning lamp will switch off.
D
Malfunction of connectors
D
Malfunction of SRS-ECU
Is B51 SRS-ECU connector correctly connected?
Yes
No
Repair
Check the following connector:
B-51
OK
Replace the SRS-ECU.
Replace
NG
Code No.35 SRS-ECU (deployed air bag) system
Probable cause
This diagnosis code is output after the air bag deploys. If this code is output before
the air bag has deployed, the cause is probably a malfunction inside the SRS-ECU.
D
Malfunction of SRS-ECU
Replace the SRS-ECU.
Code No.41 IG
1
(A) power circuit system
Probable cause
This diagnosis code is output if the voltage between the IG
1
(A) terminal and the
earth is lower than the specified value for a continuous period of 5 seconds or more.
However, if the vehicle condition returns to normal, diagnosis code No.41 will be
automatically erased, and the SRS warning lamp will switch off.
D
Malfunction of wiring harnesses or connectors
D
Malfunction of SRS-ECU
Measure at SRS check harness
connector (5).
D
Disconnect SRS-ECU
connector B-51.
D
Connect SRS check
harness connector (3).
D
Continuity between
terminals (20)
OK: Continuity
NG
Check the following
connectors:
B-51, B-78, B-80
NG
Repair
OK
Check trouble symptoms.
NG
Check the harness wire between the SRS-ECU and earth, and
repair if necessary.
OK
Measure at SRS check harness connector (5).
D
Disconnect SRS-ECU connector B-51.
D
Connect SRS check harness connector (3).
D
Ignition switch: ON
D
Voltage between terminal (14) and body earth
OK: 9 V or more
NG
Check the following
connectors:
B-51, B-78
NG
Repair
OK
Check trouble symptoms.
NG
Check the harness wire between the SRS-ECU and ignition switch
IG
1
, and repair if necessary.
OK
Replace the SRS-ECU.
SRS check harness
(MB991613)
3
5