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 a B1102 code, the battery voltage too low is indicated. When voltage returns to normal, the SRS warning light automatically goes off and a malfunction is no longer indicated.
Item
Detecting Condition
Possible Cause
DTC Strategy
? Detect system voltage
? Open/short in power.
? Contact resistance in connections.
? Faulty charging system.
? Low idle rpm.
? Loose alternator belt tension.
Enable Conditions
? Ignition "OFF"
Threshold Value
? Vbat < 9.0V
Diagnostic Time
Qualification
? More than 4 sec
De-Qualification
Test Condition
Battery Output Voltage (V)
Engine "ON"
Approx. 10.6V ~16.5V