In some cases, the SRS electronic control unit cannot function normally and, accordingly, control the warning lamp. However, the warning lamp can be activated directly and independently of the state of the control unit. Such activation is carried out in the cases listed below.
1. No power to the SRS electronic control unit from the ignition switch: the control lamp is constantly on.
2. No internal operating voltage: the control lamp is permanently on.
3. The connector of the SRS ECM is not connected: the control lamp circuit is closed by a jumper in the connector, and the lamp is constantly on.
Pic. 8.42. Scheme of operation of the control lamp