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Home >> Saturn >> 2002 >> SC2 Automatic, MP6 >> Repair and Diagnosis >> External Pages >> Different car >> Section 18 (Supplemental Inflatable Restraint System) >> Diagnostic Tests >> DTC B0077, B0078, B0079, B0080, B0081, B0082: Driver-Side Sis Valid Identification Message Not Received/Passenger-Side Sis Valid Identification Message Not Received/Driver-Side Sis Identification Error/Driver-Side Sis NOK Message/Passenger-Side Sis Identification Error/Passenger-Side Sis NOK Message >> Circuit Description
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Circuit Description

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

Side Impact Sensor (SIS) uses a unidirectional 2-wire circuit. SIS modulates current on the interface to send identification, State Of Health (SOH) and deployment commands to Sensing and Diagnostic Module (SDM). SDM provides power and ground to Side Impact Sensor (SIS). When ignition is turned on and power from SDM is detected by SIS, SIS performs internal diagnostics, then sends an identification message to SDM. SDM receives identification message within 5 seconds of power being turned on and determines if message is valid. SIS continually communicates a status message to SDM. When a fault is detected, SDM resets SIS twice by removing and reapplying power to SIS. If fault is still present, SDM will set DTC.

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