DTC B0079 Coupe
Circuit Description
When the ignition is turned ON, the SDM performs a self-test to diagnose malfunctions
inside the module. The SDM provides input power to the SIS. When input power is first
detected, the SIS responds by performing internal diagnostics. Next the SIS sends
an ID message to the SDM. The SDM will consider this to be a valid ID if the response
time is less than 5 seconds after the SIS is powered up. The SIS will continually
communicate a status message to the SDM. The SDM can reset the SIS by removing and
applying power to it.
DTC Parameters
DTC B0079 can be set when an incorrect left SIS is installed. The following
conditions must be met to set this DTC:
| • | Ignition voltage is present at the SDM and continuous. |
| • | The SDM has received an ID message from the left SIS that does not match
the ID stored in the SDM memory. |
| • | The SDM resets the left SIS twice without detecting correct operation. |
Action Taken
| • | The air bag telltale will be ON. |
Diagnostic Aids
| • | Always start diagnosis of SIR DTCs with an inspection of vehicle, including
its wiring and SIR components for visible damage. |
DTC B0079 Sedan
Circuit Description
When the ignition is turned ON, the SDM performs a self-test to diagnose malfunctions
inside the module. The SDM provides input power to the SIS. When input power is first
detected, the SIS responds by performing internal diagnostics. Next the SIS sends
an ID message to the SDM. The SDM will consider this to be a valid ID if the response
time is less than 5 seconds after the SIS is powered up. The SIS will continually
communicate a status message to the SDM. The SDM can reset the SIS by removing and
applying power to it.
DTC Parameters
DTC B0079 can be set when an incorrect left SIS is installed. The following
conditions must be met to set this DTC:
| • | Ignition voltage is present at the SDM and continuous. |
| • | The SDM has received an ID message from the left SIS that does not match
the ID stored in the SDM memory. |
| • | The SDM resets the left SIS twice without detecting correct operation. |
Action Taken
| • | The air bag telltale will be ON. |
Diagnostic Aids
| • | Always start diagnosis of SIR DTCs with an inspection of vehicle, including
its wiring and SIR components for visible damage. |
