Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2001CAVALIER LS, 2.4 TREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 104 (SUPPLEMENTAL INFLATABLE RESTRAINT SYSTEM)DIAGNOSTIC TESTSSIR DIAGNOSTIC SYSTEM CHECKDIAGNOSTIC PROCEDURE
2001 Chevrolet Cavalier LS, 2.4 T
Diagnostic Procedure
2001 Chevrolet Cavalier LS, 2.4 TSECTION Diagnostic Procedure
WARNING: This page is about a different car, the 2003 Pontiac Sunfire and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
- 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 .
- 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.
- If scan tool communicates with SDM, go to next step. If scan tool does not communicate with SDM, inspect and repair data link communication circuits.
- 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. See AIR BAG WARNING LIGHT CIRCUIT MALFUNCTION .
- 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 . 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 |
| B0022 | Driver deployment loop resistance low |
| B0024 | Driver deployment loop short to ground voltage |
| B0026 | Driver deployment loop open |
| B0028 | Passenger side impact deployment loop resistance low |
| B0029 | Passenger side impact deployment loop open |
| B0030 | Passenger side impact deployment loop short to ground/voltage |
| B0035 | Electronic frontal sensor circuit closed or short to ground |
| B0036 | Electronic frontal sensor circuit open or short to voltage |
| B0040 | Driver side impact deployment loop resistance low |
| B0041 | Driver side impact deployment loop open |
| B0045 | Driver side impact deployment loop short to |
| B0051 | Deployment commanded |
| B0053 | Deployment commanded with loop malfunction |
| B0077 | Driver SIS valid identification message not received |
| B0078 | Passenger SIS valid identification message not received |
| B0079 | Driver SIS identification not correct |
| B0080 | Driver SIS NOK message |
| B0081 | Passenger SIS identification not correct |
| B0082 | Passenger SIS NOK message |
| B1000 | BCM Malfunction |
| B1001 | Option configuration error |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.