
SRS –
Troubleshooting
52B-9
Code No.24, 25, 64 or 65 Front passenger’s side air bag
module (squib) system
Probable cause
These diagnosis codes are output if there is abnormal resistance between the input
terminals of the driver’s side air bag module (squib).
The trouble causes for each diagnosis code No. are as follows.
D
Malfunction of wiring harnesses or connectors
D
Malfunction of front passenger’s side air bag module
(squib)
D
Malfunction of SRS-ECU
Code No.
Trouble symptom
24
D
Short in front passenger’s side air bag module (squib) or harness short
D
Malfunction of connector*
25
D
Open circuit in front passenger’s side air bag module (squib) or open harness
D
Malfunction of connector contact
64
D
Short in front passenger’s side air bag module (squib) harness leading to the power
supply
65
D
Short in front passenger’s side air bag module (squib) harness leading to the earth
NOTE
*:
The connector in the squib circuit has a built-in short bar which short-circuits between plus (+) lead and minus
(–) lead of the squib circuit when the connector is not being connected to prevent an accidental air bag deployment
possibly caused by static electricity, etc. Therefore, malfunction of the connector can also be caused by this
short bar which fails to be released even when the connector is reconnected if it is damaged.
OK
Check trouble symptoms.
NG
Check the harness wire
between the front passen-
ger’s side air bag module
(squib) and SRS-ECU.
NG
Repair
OK
Replace the SRS-ECU.
Yes
Check the following
connectors:
B-01, B-51
NG
Repair
SRS check harness
(MB991613)
Body
wiring
harness
1
No
Replace the front passenger’s side air bag module.
MUT-
II
Self-diag code
D
Disconnect front
passenger’s side air bag
module connector B-01.
D
Connect SRS check
harness connector (1).
D
Erase diagnosis code
memory.
Are code Nos.24, 25, 64 or 65
output?
Code No.31 or 32 SRS-ECU capacitor system
Probable cause
Probable cause
These diagnosis codes are output if there is abnormal resistance between the input
terminals of the driver’s side air bag module (squib).
D
Malfunction of SRS-ECU
Code No.
Trouble symptom
31
D
Voltage at the capacitor terminal is higher than the specified value for five seconds
or more
32
D
Voltage at the capacitor terminal is lower than the specified value for five seconds
or more (this is not detected if diagnosis code No.41 or 42 indicating system voltage
drop has been output.)
Replace the SRS-ECU.