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.
Bulb Check
2000 Chevrolet Malibu V6-3.1L VIN JSECTION Bulb Check
The bulb check function resides in the BCM. Every time the ignition switch
transitions from ACC to ON, an instrument cluster bulb check will occur for a calibrated amount of time for specified indicators. The bulb check will override the OFF state of the affected indicators. The BCM will determine which indicators to bulb check by looking at an EEPROM table. Every Serial Peripheral Interface (SPI) indicator has a bit in the EEPROM table. The gauges will WOW during a bulb check. A WOW occurs when all of the gauge indicators are moved at the same time. If there is an indicator lit before the WOW, the indicator will remain lit after this function has concluded.
transitions from ACC to ON, an instrument cluster bulb check will occur for a calibrated amount of time for specified indicators. The bulb check will override the OFF state of the affected indicators. The BCM will determine which indicators to bulb check by looking at an EEPROM table. Every Serial Peripheral Interface (SPI) indicator has a bit in the EEPROM table. The gauges will WOW during a bulb check. A WOW occurs when all of the gauge indicators are moved at the same time. If there is an indicator lit before the WOW, the indicator will remain lit after this function has concluded.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.