In some cases, the SRS electronic control unit cannot function normally and, accordingly, control the indicator lamp. However, the indicator lamp can be activated directly and independently of the control unit state. Such activation is carried out in the cases listed below.
1. No power to the SRS electronic control unit from the ignition switch: the indicator lamp is constantly on.
2. No internal working voltage: the indicator lamp is constantly on.
3. The SRS electronic control unit connector is not connected: the indicator lamp circuit is shorted by the jumper in the connector, and the lamp lights up constantly.
Fig. 8.42. Operation diagram of the control lamp