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DTC Description
The SRSCM shall also cyclically monitor the following :
1. Functional readliness of the firing circuit activation transistors.
2. Adequacy of deployment energy reserves.
3. Safing sensor integtity : detection of faulty closure.
4. Plausibility of accelerometer signal.
5. Operation of SRSCM components.
Inspection Procedure
The SRSCM must be replaced once the fault codes except B1657 mentioned above are confirmed. Be able to reuse
SRSCM 5 times, when B1657 is only monitored.
Restraint > Troubleshooting > B1670
DTC Description
The SRSCM shall also cyclically monitor the following :
1. Functional readliness of the firing circuit activation transistors.
2. Adequacy of deployment energy reserves.
3. Safing sensor integtity : detection of faulty closure.
4. Plausibility of accelerometer signal.
5. Operation of SRSCM components.
Inspection Procedure
The SRSCM must be replaced once the fault codes except B1657 mentioned above are confirmed. Be able to reuse
SRSCM 5 times, when B1657 is only monitored.
Restraint > Troubleshooting > B2500
DTC Description
The SRS warning lamp is located in the cluster. When the airbag system is normal, the SRS warning lamp flashes for
approx. 6 seconds after the ignition switch is turned ON, and then turns off automatically. If there is a malfunction in the
airbag system, the SRS warning lamp lights up to inform the driver of the abnormality. The SRSCM shall measure the
voltage at the SRS warning lamp output pin, both when the lamp is on and when the lamp is off, to detect whether the
commanded state matches the actual state.
DTC Detecting Condition
DTC
Condition
Probable cause
B2500
• Airbag fuse
• Warning Lamp Bulb
• Open between warning lamp and SRSCM
• Short to ground or battery line between the warning lamp and SRSCM
• SRSCM Malfunction
• Fuse
• Warning lamp bulb
• Wiring Harness
• SRSCM
Schematic Diagram