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(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 > B1409
DTC Description
The detecting system for side crash consists of the SRSCM and two Side Impact Sensors (SIS). The SRSCM sets
above DTC(s) if it detects that any SIS is defective or there is communication error between any front SIS and the
SRSCM.
DTC Detecting Condition
DTC
Condition
Probable cause
B1400
B1403
B1409
B1410
• Open between SIS and SRSCM
• Side Impact Sensor (SIS) Malfunction
• SRSCM Malfunction
• Wiring Harness
• Side Impact Sensor
(SIS) squib
• SRSCM
Schematic Diagram
Terminal & Connector Inspection
1. Visually inspect all connectors related to the affected circuit for damage and secure connection.
2. Inspect terminals for damage and corrosion.