OD(diag)-25
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
OCCUPANT DETECTION SYSTEM (DIAGNOSTICS)
D: DTC 27 ODS COMMUNICATION ERROR
Perform the diagnosis following diagnostic procedures for the airbag system. <Ref. to AB(diag)-60, DTC 27
ODS COMMUNICATION ERROR, Diagnostic Chart with Trouble Code.>
Step
Check
Yes
No
1
CHECK POOR CONTACT OF CONNEC-
TORS.
Check for poor contact of the connectors
between the occupant detection control module
and belt tension sensor.
Is there poor contact?
Reconnect the
connector. If the
fault is not fixed,
replace the airbag
harness.
Go to step
2
.
2
CHECK BELT TENSION SENSOR.
1) Turn the ignition switch to OFF, disconnect
the ground cable from battery, and wait for 20
seconds or more.
2) Disconnect the belt tension sensor connec-
tor (AB56) from the airbag harness.
3) Connect the test harness AC to the connec-
tor (AB56).
4) Connect the battery ground terminal and
turn the ignition switch to ON.
Does the airbag warning light
illuminate for approximately 6
seconds and go off?
Replace the seat
belt outer. <Ref. to
SB-17, OUTER
SEAT BELT
ASSEMBLY,
REMOVAL, Front
Seat Belt.>
Go to step
3
.
3
CHECK AIRBAG HARNESS.
1) Turn the ignition switch to OFF, disconnect
the ground cable from battery, and wait for 20
seconds or more.
2) Disconnect the test harness AC from the
belt tension sensor connector (AB56).
3) Connect the test harness AD (1AD) to the
connector (AB56).
4) Disconnect the airbag harness connector
(AB53), and connect connector (1AB) of test
harness AB.
5) Measure the resistance between test har-
ness terminals.
Connector & terminal
(2AB) No. 5 — (2AD) No. 1:
(2AB) No. 4 — (2AD) No. 3:
(2AB) No. 6 — (2AD) No. 2:
Is the resistance less than 10
:
? Go to step
4
.
Replace the airbag
harness along with
chassis harness.
4
CHECK AIRBAG HARNESS.
Measure the resistance between test harness
terminals, and between test harness terminal
and chassis ground.
Connector & terminal
(2AB) No. 4 — (2AD) No. 1:
(2AB) No. 4 — (2AD) No. 2:
(2AB) No. 4 — chassis ground:
(2AB) No. 5 — (2AD) No. 2:
(2AB) No. 5 — chassis ground:
Is the resistance 1 M
:
or
more?
Go to step
5
.
Replace the airbag
harness along with
chassis harness.
5
CHECK AIRBAG HARNESS.
1) Connect the battery ground terminal and
turn the ignition switch to ON.
2) Measure the voltage between test harness
and chassis ground.
Connector & terminal
(2AD) No. 1 (+) — Chassis ground (–):
(2AD) No. 3 (+) — Chassis ground (–):
Is the voltage 1 V or less?
Replace the airbag
harness along with
chassis harness.
Check the seat
harness, and if any
fault is found,
replace the seat
harness. If no fault
is found in the seat
harness, replace
the seat cushion
frame assembly.
<Ref. to SE-8,
PASSENGER’S
SEAT, DISASSEM-
BLY, Front Seat.>
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