Circuit Description
The ECU-B Fuse supplies battery voltage at all times to the AIR BAG warning lamp that is connected to the AIR BAG Indicator Control connector C2 terminal 2. When the ignition switch is turned to ACC or ON, battery voltage is applied to the inflatable restraint Sensing and Diagnostic Module (SDM) at connector C2 terminal 4. The SDM responds by illuminating the AIR BAG warning lamp for approximately six seconds while performing diagnostic tests on the SIR system. The IGN Fuse supplies battery voltage to the SDM at connector C2 terminal 3 when the ignition switch is in the ON or START positions.
Test Description
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the SIR Diagnostic System Check performed? | -- | ||
Is the resistance measured within the specified values? | 0-5 ohms | |||
3 | Repair short to ground in the BLK/YEL wire between the data link connector, the SDM and the instrument cluster. Refer to Wiring Repair in this section. Are all the repairs complete? | -- | -- | |
4 | Replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement . Are all the repairs complete? | -- | -- | |
5 | Reconnect all the SIR components. Make sure all the components are properly mounted. Have all the SIR components been reconnected and properly mounted? | -- | -- |
