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 B1101 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 remain lite up and the DTC is the normal code,this means a voltage source drops or high.
- This malfunction is not stored in memory by the SRS Control Module and if the power source voltage returns to normal,the SRS warning light will automatically go out.
- 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 |
