The SRS is equipped with a voltage-increase or decrease circuit (DC-DC converter) in the SRSCM in case the source voltage goes down or up. When the battery voltage is down or up the voltage-increase or decrease circuit (DC-DC converter) function will increase or decrease the voltage of the SRS to normal voltage.
When the SRS warning lamp remains lit up and the DTC is the B1103 code, the communication voltage too low is indicated.
Item
Detecting Condition
Possible Cause
DTC Strategy
? Voltage check
? Open/short in power.
? Contact resistance in connections.
? Faulty charging system.
? Low idle rpm.
? Loose alternator belt tension.
Enable Conditions
? Engine "ON"
Threshold Value
? Vbat < 10.6 V
Diagnostic Time
Qualification
? More than 16 sec
De-Qualification
? More than 9.6 sec