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 MANUALSSATURN2000LW2 AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 12 (MEMORY SYSTEMS)DIAGNOSTIC TESTSDTC B2860: COLUMN POSITION SENSOR FAILURE (SCM)TESTING
2000 Saturn LW2 Automatic
DTC B2860: Column Position Sensor Failure (SCM): Testing
2000 Saturn LW2 AutomaticSECTION Testing
WARNING: This page is about a different car, the 2000 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- If diagnostic system check was performed, go to next step. If diagnostic system check has not been performed, go to DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM.
- Using scan tool, display SCM DTCs. If DTC B2860 is set as history, go to next step. If DTC B2860 is not set as history, go to step 6 .
- Using scan tool, monitor SCM data display for telescoping steering column position sensor. Attempt to operate steering column using switch. If scan tool does not display 0.10-4.78 volts, go to next step. If scan tool displays 0.10-4.78 volts, go to step 12 .
- Turn ignition off. Disconnect steering column actuator 3-pin connector. Turn ignition on. Using DVOM, measure voltage between steering column actuator connector terminal "A" (Purple wire) and ground while operating steering column in and out using switch. If voltage is 4.0-5.5 volts, go to next step. If voltage is not 4.5-5.5 volts, go to step 7 .
- Measure voltage between steering column actuator 3-pin connector terminals "A" (Purple wire) and "B" (Black wire) while operating steering column in and out using switch. If voltage is not 4.0-5.5 volts, go to step 8 . If voltage is 4.0-5.5 volts, go to step 10 .
- Turn ignition off. Disconnect steering column actuator 3-pin connector. Turn ignition on. Using DVOM, measure voltage between steering column actuator connector terminal "C" (White wire) and ground while operating steering column in and out using switch. If voltage is not 3.5-5.5 volts, go to step 9 . If voltage is 3.5-5.5 volts, go to step 10 .
- Check for open, short to ground or short to voltage in 5 volt supply circuit between steering column actuator connector and SCM connector C1. See WIRING DIAGRAMS . If circuit is okay, go to step 11 . If faulty circuit is found and repaired, go to step 14 .
- Check for open or short to voltage in sensor ground circuit between steering column actuator connector and SCM connector C1. See WIRING DIAGRAMS . If circuit is okay, go to step 11 . If faulty circuit is found and repaired, go to step 14 .
- Check for open, short to ground or short to voltage in White wire between steering column actuator connector and SCM connector C1. If circuit is okay, go to step 11 . If faulty circuit is found and repaired, go to step 14 .
- Replace telescoping actuator assembly. See STEERING COLUMN SWITCHES - CORVETTE article. After repairs, go to step 14 .
- Replace SCM. See SEAT CONTROL MODULE under REMOVAL & INSTALLATION. After repairs, go to step 14 .
- Check steering column actuator position sensor wiring and connectors for intermittent malfunctions. See WIRING DIAGRAMS . If problem is not found, go to next step. If problem circuit or connector is repaired, go to step 14 .
- Turn ignition off. Reconnect all disconnected components and connectors. Turn ignition on and clear any DTCs. Wait 2 seconds. If DTC B2860 sets as history, go to step 11 . If DTC B2860 does not set as history, system is okay at this time.
- Turn ignition off. Reconnect all disconnected components and connectors. Turn ignition on and clear any DTCs. If DTC resets, go to DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM.
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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.