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.
Scan Tool Data Definitions: Data
- Console Switch Illumination
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The scan tool displays 0-100%. The illumination percentage varies based upon the dimming switch information sent by the IPC on the serial data line. When the dimming switch is rotated to bright, the console switch illumination percentage will increase. When the dimming switch is rotated to dim, console switch illumination percentage will decrease. The headlamps or parklamps must be ON to read console illumination data.
- DRL Ambient Light Sensor
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The scan tool displays 0-5.0 volts. The voltage level varies based upon the ambient light level at the sensor. When light levels are high (Light), voltage will increase. When light levels are low (Dark), voltage will decrease. The BCM uses this information for automatic headlamp operation.
- Fog Light Illumination
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The scan tool displays 0-100%. The illumination percentage varies based upon the dimming switch information sent by the IPC on the serial data line. When the dimming switch is rotated to bright, the fog light switch illumination percentage will increase. When the dimming switch is rotated to dim, fog light switch illumination percentage will decrease. The headlamps or parklamps must be ON to read fog light illumination data.
- HVAC Bulb Illumination
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The scan tool displays 0-100%. The illumination percentage varies based upon the dimming switch information sent by the IPC on the serial data line. When the dimming switch is rotated to bright, the HVAC illumination percentage will increase. When the dimming switch is rotated to dim, HVAC illumination percentage will decrease. The headlamps or parklamps must be ON to read HVAC illumination data.
- PRNDL Illumination
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The scan tool displays 0-100%. The illumination percentage varies based upon the dimming switch information sent by the IPC on the serial data line. When the dimming switch is rotated to bright, the PRNDL illumination percentage will increase. When the dimming switch is rotated to dim, PRNDL illumination percentage will decrease. The headlamps or parklamps must be ON to read PRNDL illumination data.
- Door Switch Pad Illumination
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The scan tool displays 0-100%. The illumination percentage varies based upon the dimming switch information sent by the IPC on the serial data line. When the headlamps or parklamps are ON, and the dimming switch is rotated to bright, the LH door switch illumination percentage will increase. When the dimming switch is rotated to dim the LH door switch illumination percentage will decrease.
- Door Switch Pad Illumination
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The scan tool displays 0-100%. The illumination percentage varies based upon the dimming switch information sent by the IPC on the serial data line. When the headlamps or parklamps are ON, and the dimming switch is rotated to bright, the RH door switch illumination percentage will increase. When the dimming switch is rotated to dim the RH door switch illumination percentage will decrease.
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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.