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 MANUALSCHEVROLET1999CORVETTE 2D COUPE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)RESTRAINTSAIR BAG, SRSSUPPLEMENTAL INFLATABLE RESTRAINT SYSTEMDIAGNOSTIC TESTSDTC B0026: DRIVER DEPLOYMENT LOOP OPENDIAGNOSTIC PROCEDURE
1999 Chevrolet Corvette 2D Coupe, Standard
Diagnostic Procedure
1999 Chevrolet Corvette 2D Coupe, StandardSECTION Diagnostic Procedure
- 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 .
- Disconnect driver-side air bag Yellow 2-pin connector located at base of steering column. See Figure . Check for proper connection driver-side air bag Yellow 2-pin connector. If terminals are damage or corroded, go to next step. If terminals are okay, go to step 4 .
- Replace driver-side air bag harness Yellow 2-pin connector. Go to step 16 .
- Reconnect driver-side air bag Yellow 2-pin connector. Ensure CPA clip is installed correctly. Turn ignition on. Using scan tool, check for SIR DTCs. If DTC B0026 is retrieved, go to next step. If DTC B0026 is not retrieved, go to step 3 .
- Turn ignition off. Disconnect driver and passenger-side air bag Yellow 2-pin connectors located at base and right-side of steering column. See Figure and Figure . Install SIR Driver/Passenger Load Tool (J-38715-A) to harness connectors. Turn ignition on. Using scan tool, check for SIR DTCs. If DTC B0026 is retrieved, go to step 9 . If DTC B0026 is not retrieved, go to next step.
- Turn ignition off. Remove SIR Driver/Passenger Load Tool (J-38715-A) from harness connectors. Reconnect driver-side air bag Yellow 2-pin connector. Connect SIR Driver/Passenger Load Tool (J-38715-A) to SIR coil-to-air bag module connector. Turn ignition on. Using scan tool, check for SIR DTCs. If DTC B0024 is retrieved, go to step 8 . If DTC B0024 is not retrieved, go to next step.
- Turn ignition off. Replace driver-side air bag. See AIR BAG MODULES under REMOVAL & INSTALLATION . Go to step 16 .
- Turn ignition off. Replace SIR coil. See SIR COIL ASSEMBLY under REMOVAL & INSTALLATION . Go to step 16 .
- Turn ignition off. Remove SIR Driver/Passenger Load Tool (J-38715-A) from harness connectors. Disconnect SDM harness connector. Inspect for proper connection at SDM harness connector terminals No. 6 and 7. See Figure . If terminals are damaged or corroded, go to next step. If terminals are okay, go to step 11 .
- Replace SDM harness connector. Go to step 16 .
- Using Digital Multimeter (J-39200), measure resistance between driver-side harness connector terminal "B" and SDM connector terminal No. 6. See Figure and Figure . If resistance is 0-0.5 ohms, go to step 13 . If resistance is greater than 0.5 ohms, go to next step.
- Repair open or high resistance in circuit 347. Go to step 16 .
- Measure resistance between driver-side harness connector terminal "A" and SDM connector terminal No. 7. See Figure and Figure . If resistance is 0-0.5 ohms, go to step 15 . If resistance is greater than 0.5 ohms, go to next step.
- Repair open or high resistance in circuit 348. Go to step 16 .
- Replace SDM. See SENSING & DIAGNOSTIC MODULE (SDM) under REMOVAL & INSTALLATION . Go to next step.
- Reconnect all SIR components. Ensure that all components are properly mounted. Clear all SIR DTCs. Go to SIR DIAGNOSTIC SYSTEM CHECK .
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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.