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 DIAGNOSISHEATING AND AIR CONDITIONINGTESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESSCAN TOOL CONTROL OUTPUTS
1999 Cadillac Seville SLS V8-4.6L VIN Y
Scan Tool Control Outputs
1999 Cadillac Seville SLS V8-4.6L VIN YSECTION Scan Tool Control Outputs
Control Outputs
Use a Scan Tool to control the module output functions. When the module output control is selected, the Scan Tool can command the module to turn an output on or off. This feature can be used to determine if the module is able to control an output regardless of the inputs or any specific program instructions. Once a test is selected, the Scan Tool will command the module to energize the selected output. The Scan Tool then displays the status of the selected output. The displayed information represents only what was module commanded, not what action was actually taken. Check if the module is actually performing each of the selected output functions. It may be necessary to have the ignition in the RUN position to control outputs.
Use a Scan Tool to control the module output functions. When the module output control is selected, the Scan Tool can command the module to turn an output on or off. This feature can be used to determine if the module is able to control an output regardless of the inputs or any specific program instructions. Once a test is selected, the Scan Tool will command the module to energize the selected output. The Scan Tool then displays the status of the selected output. The displayed information represents only what was module commanded, not what action was actually taken. Check if the module is actually performing each of the selected output functions. It may be necessary to have the ignition in the RUN position to control outputs.
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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.