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Diagnostic Procedure

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install scan tool to Data Link Connector (DLC), located near base of steering column. If scan tool powers up, go to next step. If scan tool does not power up, inspect and repair data link communication circuits.
  2. Turn ignition on. If scan tool communicates with SDM, go to next step. If scan tool does not communicate with SDM, inspect and repair data link communications circuits.
  3. Select SIR DTC's function on scan tool. If scan tool displays SIR DTC's, go to next step. If scan tool does not display any DTC's, inspect vehicle for damage to wiring system, visible body damage, faulty or intermittent electrical connections or addition of aftermarket devices which could affect SIR operation. Diagnose air bag warning light problems. See AIR BAG WARNING LIGHT CIRCUIT MALFUNCTION .
  4. If scan tool displays any DTC's that begin with "U", inspect and repair applicable Class 2 Data Link Communication circuit and component. If no DTC's are displayed that begin with "U", go to next step.
  5. If scan tool displays DTC B1000, go to DTC B1000 . If scan tool displays other DTC's, diagnose and repair applicable SIR DTC's. See DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION  table.
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