The SRS is equipped with a voltage control circuit (DC-DC converter) in the SRSCM to maintain certain voltage and current for the system. When the battery voltage is higher than the specification, due to alternator voltage regulator malfunction, or other reasons, the warning lamp will remain lit and a DTC B1111 code will occur. However the DTC is not stored in memory by the SRS Control Module and when the voltage returns to normal, the SRS warning light will automatically turn off.
- When the SRS warning light remains lit and the DTC displayed is a normal code, this signifies the voltage rise is too high.
- This malfunction is not stored in memory by the SRS Control Module so if the power source voltage returns to normal, the SRS warning light will automatically go off.
- If a code not listed on the chart is displayed, the SRS Control Module is faulty.
Item
Detecting Condition
Possible Cause
DTC Strategy
? Detect system voltage
? SRSCM poor ground contact.
? Alternator voltage regulator malfunction
? SRSCM faulty.
Enable Conditions
? Ignition "ON"
Threshold Value
? 16.0V < Vbat <= 24.0V
Diagnostic Time
Qualification
? 12 sec remaining
De-Qualification
? 10 sec remaining
Test Condition
Battery Output Voltage (V)
Idle & WOT
10-16V