Table of Contents
Advertisement
NOTE:
·
When there is poor connection between the air bag
ECU and the squib, the code 31 is indicated, too.
(1) Turn off the ignition switch and wait for 60 seconds.
(2) Remove the console box. Disconnect the connector at
the vehicle wire harness side from the air bag ECU.
NOTE:
·
When the connector is disconnected from the air bag
ECU, the connector terminals 2 and 3 are shorted au-
tomatically by the short circuit bridge.
(3) Disconnect the connector which connects the wire
harness of the air bag unit and the wire cowl.
NOTE:
·
When the connector is disconnected from the air bag
unit, the connector terminals (h) and (j) are shorted au-
tomatically by the short circuit bridge.
(4) Connect the circuit tester to the connector terminal at
the wire cowl side with the tester set to the ohmmeter
range. Ensure that there is no open wire in the wire
harness.
Between terminal 3 (P+) and H (+):
Continuity exists.
Between terminal 2 (P–) and J (–):
Continuity exists.
(5) If there is no open wire, connect both ends of the con-
nector terminal with a jump wire to short them.
(6) Connect the connector at the vehicle wire harness
side and the air bag ECU connector that were discon-
nected at Step (2).
(7) Turn on the ignition switch and take a reading of the di-
agnosis code.
CAUTION:
·
If the code 32 (short circuit of squib circuit) is indicated,
it proves indirectly that there is open wire in the squib
of the air bag unit in the front passenger seat side.
Therefore, replace the air bag unit.
·
After the replacement, cancel the diagnosis code and
confirm that the code 31 is not outputted any more.
2nd lock
1st
lock
Airbag unit side
Air bag ECU
Cowl wire
P+
3
3
H
P–
J
2
2
Air bag ECU
Cowl wire
P+
3
P–
2
ECUT
Diagnosis
connector
E
Diagnosis connector
Test terminal
(ECU-T)
BE–75
Connector
Air bag ECU
JBE00257-05095
JBE00258-05096
Squib
(Passenger's
seat side)
h
j
JBE00259-05097
Jump wire
H
J
IG ON
JBE00260-05098
Earth
terminal (E)
JBE00261-05099
Advertisement
Table of Contents
