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Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Pontiac Sunfire and 2002 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
  1. If SIR Diagnostic System Check has been performed, go to next step. If SIR Diagnostic System Check has not been performed, go to SIR DIAGNOSTIC SYSTEM CHECK .
  2. Install scan tool to Data Link Connector (DLC), located below left side of instrument panel. If scan tool powers up, go to next step. If scan tool does not power up, inspect and repair data link communication circuits.
  3. If scan tool communicates with Sensing and Diagnostic Module (SDM), go to next step. If scan tool does not communicate with SDM, inspect and repair data link communication circuits.
  4. Select SIR DTC display on scan tool. If scan tool displays DTC's, go to next step. If scan tool does not display DTC's, check for malfunctioning data link communication circuits, addition of aftermarket accessories or damage to vehicle. Carefully inspect vehicle for signs of damage or conditions that could cause poor or intermittent electrical connections. Diagnose air bag warning light problems. See AIR BAG WARNING LIGHT CIRCUIT MALFUNCTION .
  5. If scan tool displays DTC's that start with "U", inspect and repair data link communication circuits. If scan tool displays DTC B1000, go to DTC B1000: BCM MALFUNCTION . If scan tool displays other DTC's, perform appropriate diagnostic procedures. See DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION  table.
DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

Trouble Code Possible Cause
B0016  Passenger deployment loop resistance low
B0017  Passenger deployment loop open
B0018  Passenger deployment loop short to ground/voltage out of range
B0022  Driver deployment loop resistance low
B0024  Driver deployment loop short to ground/voltage out of range
B0026  Driver deployment loop open
B0035  Front end discriminating sensor circuit closed or short to ground
B0036  Front end Discriminating sensor circuit open or short to voltage
B0051  Deployment commanded
B0053  Deployment commanded with loop malfunction
B1000  BCM Malfunction
B1001  Option configuration error
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