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 MANUALSCHEVROLET1999CUTAWAY 7.4 JREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSANTI-THEFT SYSTEMDIAGNOSTIC TESTSDTC B2948: SECURITY SYSTEM SENSOR POWER CKT HIGHTESTING PROCEDURE
1999 Chevrolet Cutaway 7.4 J
Testing Procedure
1999 Chevrolet Cutaway 7.4 JSECTION Testing Procedure
- If the VTD Diagnostic System Check was performed, go to the next step. If not, go to DIAGNOSTIC SYSTEM OPERATION CHECK - ANTI-THEFT (DOMESTIC) under TROUBLE SHOOTING.
- Turn the ignition switch to OFF. Disconnect the Passlock™ module connector. See ANTI-THEFT MODULE under REMOVAL & INSTALLATION. Use a Digital Multimeter (DMM) in order to measure the voltage (9-16 volts) from the Passlock™ module connector terminal A5 to ground. See Figure. This step isolates the short to battery between the Passlock™ module and the harness. If the voltage is within the specified range, go to the next step. If the voltage is not within the specified range, go to step 6.
- Disconnect the C200 at the base of the steering column. Use a DMM in order to measure the voltage (9-16 volts) from the Passlock™ module connector terminal A5 to ground. This step isolates the short to battery between the Passlock™ sensor and the harness. If the voltage is within the specified range, go to the next step. If the voltage is not within the specified range, go to step 5.
- Repair the short to battery in CKT 812. If the repair is complete, go to DIAGNOSTIC SYSTEM OPERATION CHECK - ANTI-THEFT (DOMESTIC) under TROUBLE SHOOTING.
- Replace the Passlock™ sensor in the electronic column lock module assembly. To disassemble and assemble the lock module assembly on models with tilt wheels and standard wheels, see REMOVAL & INSTALLATION in STEERING COLUMNS - TRUCKS - EXCEPT TRACKER article. If the repairs are complete, go to the next step.
- Replace the Passlock™ module. See ANTI-THEFT MODULE under REMOVAL & INSTALLATION. If the repairs are complete, go to the next step.
- Reconnect all of the previously disconnected connectors and the components. Turn the ignition switch ON. Connect the scan tool. Clear the DTCs. Perform one of the following Passlock™ reprogramming procedures:
- PASSLOCK™ Reprogramming Seed and Key. See PASSLOCK™ SEED & KEY under PROGRAMMING.
- PASSLOCK™ Reprogramming Auto Learn. See PASSLOCK™ AUTO LEARN under PROGRAMMING.
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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.