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Go to next stop.
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Replace the BS.
5. CLEAR THE DTC AND CHECK THE VEHICLE AGAIN
(1) Install the DAB module and connect the DAB connector.
(2) Connect the connectors of the PAB, SAB, CAB, BPT, BUPT, FIS and SIS.
(3) Connect the SRSCM connector.
(4) Connect the negative () terminal to the battery.
(5) Connect a HiScan(Pro) to the data link connector.
(6) Turn the ignition switch to ON .
(7) Clear the DTC stored in the SRSCM memory with the HiScan(Pro).
(8) Turn the ignition switch to LOCK and wait for at least 30 seconds.
(9) Turn the ignition switch to ON and wait for at least 30 seconds.
(10) Check the vehicle again with the HiScan(Pro).
Does the above DTC(s) go off?
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Problem is intermittent or was repaired and SRSCM memory was not cleared.
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Replace the SRSCM with a new one, and then check the vehicle again. At this time, if the vehicle normally
operates with a new SRSCM, the fault may be the SRSCM(Replace SRSCM).
Restraint > Troubleshooting > B1523
DTC Description
The Seat Belt Buckle Switch (BS) circuit consists of the SRSCM and two BS. The SRSCM sets above DTC(s) if it
detects short or short to battery line on the BS circuit. This system decides whether the driver or passenger seat belt is
locked or not.
DTC Detecting Condition
DTC
Condition
Probable cause
B1521
B1523
• Short between BS and SRSCM
• Short to battery line between BS and SRSCM
• Seat Belt Buckle Switch (BS) Malfunction
• SRSCM Malfunction
• Short or short to battery
line circuit on wiring
harness
• Seat Belt Buckle Switch
(BS)
• SRSCM
Specification
BS Satus
Resistance(R) or Current (mA)
Related DTC(s)
Short to ground
R < 70Ω (low line, BS Buckled)
B1522, B1524
"UNBUCKLED" status
4 < I < 7mA
"BUCKLED" status
12 < I < 17mA
Short to battery
R < 600Ω (low line, BS Unbuckled)
B1521, B1523
Schematic Diagram