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 MANUALSCADILLAC1999SEVILLE SLS V8-4.6L VIN YREPAIR AND DIAGNOSISRESTRAINTS AND SAFETY SYSTEMSAIR BAG SYSTEMSTESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESSCAN TOOL DATA DEFINITIONS
1999 Cadillac Seville SLS V8-4.6L VIN Y
Scan Tool Data Definitions
1999 Cadillac Seville SLS V8-4.6L VIN YSECTION Scan Tool Data Definitions
SIR Scan Tool Definitions
The following list contain a brief description of all SIR related parameters available on the scan tool. The list is in the order it appears on the scan tool.
Ignition: The scan tool displays 0 - 25.5 Volts. The Ignition represents the system voltage measured by the SDM at its ignition feed.
Driver Senselo: The scan tool displays 0 - 20 Volts. The SDM measures the voltage of the driver frontal low terminal voltage and displays it as Driver Senselo.
Passenger Senselo: The scan tool displays 0 - 20 Volts. The SDM measures the voltage of the passenger frontal low terminal voltage and displays it as Passenger Senselo.
Driver VDIF: The scan tool displays 0 - 500 Millivolts. The SDM measures the difference between driver frontal high and driver frontal low to determine voltage differential.
Passenger VDIF: The scan tool displays 0 - 500 Millivolts. The SDM measures the difference between passenger frontal high and driver frontal low terminals to determine voltage differential.
Driver Energy Reserve: The scan tool displays 0 - 30 Volts. The SDM measures the voltage of the driver frontal energy reserve capacitors inside the SDM and displays it as Driver Energy Reserve.
Passenger Energy Reserve: The scan tool displays 0 - 30 Volts. The SDM measures the voltage of the passenger frontal energy reserve capacitors inside the SDM and displays it as Passenger Energy Reserve.
Warning Lamp ON Time: The scan tool displays 0 - 182 Hours. The SDM measures the continuous warning lamp on time.
Ignition Cycles Lamp ON: The scan tool displays 0 - 125 Cycles. The ignition cycles with the warning lamp ON.
Ignition Cycles Lamp OFF: The scan tool displays 0 - 125 Cycles. The ignition cycles with the warning lamp OFF.
Seatbelt Status: The scan tool displays Buckled or Unbuckled. The SDM receives a discrete signal from the seat belt switch at SDM terminal 1. The SDM sends the seat belt message status over the Class 2 Serial Data Line.
The following list contain a brief description of all SIR related parameters available on the scan tool. The list is in the order it appears on the scan tool.
Ignition: The scan tool displays 0 - 25.5 Volts. The Ignition represents the system voltage measured by the SDM at its ignition feed.
Driver Senselo: The scan tool displays 0 - 20 Volts. The SDM measures the voltage of the driver frontal low terminal voltage and displays it as Driver Senselo.
Passenger Senselo: The scan tool displays 0 - 20 Volts. The SDM measures the voltage of the passenger frontal low terminal voltage and displays it as Passenger Senselo.
Driver VDIF: The scan tool displays 0 - 500 Millivolts. The SDM measures the difference between driver frontal high and driver frontal low to determine voltage differential.
Passenger VDIF: The scan tool displays 0 - 500 Millivolts. The SDM measures the difference between passenger frontal high and driver frontal low terminals to determine voltage differential.
Driver Energy Reserve: The scan tool displays 0 - 30 Volts. The SDM measures the voltage of the driver frontal energy reserve capacitors inside the SDM and displays it as Driver Energy Reserve.
Passenger Energy Reserve: The scan tool displays 0 - 30 Volts. The SDM measures the voltage of the passenger frontal energy reserve capacitors inside the SDM and displays it as Passenger Energy Reserve.
Warning Lamp ON Time: The scan tool displays 0 - 182 Hours. The SDM measures the continuous warning lamp on time.
Ignition Cycles Lamp ON: The scan tool displays 0 - 125 Cycles. The ignition cycles with the warning lamp ON.
Ignition Cycles Lamp OFF: The scan tool displays 0 - 125 Cycles. The ignition cycles with the warning lamp OFF.
Seatbelt Status: The scan tool displays Buckled or Unbuckled. The SDM receives a discrete signal from the seat belt switch at SDM terminal 1. The SDM sends the seat belt message status over the Class 2 Serial Data Line.
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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.