Chevrolet Cobalt Service & Repair Manual: Traction Control System, Inspection

Chevrolet Cobalt Service & Repair Manual / Brakes / General Procedures / Traction Control System, Inspection

A visual inspection must always be performed to confirm the presence of aftermarket components, potential collision damage, or areas of concern.
The test can be performed with a dynamometer or supporting vehicle on appropriate lift. Inspection must be completed within 20 seconds after pressing accelerator pedal or TCL system will stop functioning (fail-safe).
1. Visually inspect for obvious signs of mechanical or electrical damage.
2. If an obvious cause for an observed or reported concern is found, correct cause if possible before proceeding.
3. Connect a suitably programmed scan tool to vehicle DLC.
4. Carry out network test.
5. Clear continuous DTCs and carry out self-test diagnostics for ABS/Traction Control module.
6. Start and idle vehicle.
7. Press TCL mode switch to ON position.
8. Place front wheels on dynamometer rollers (if available). Ensure all safety procedures are followed when using dynamometer.
9. If dynamometer is not available, lift and support vehicle.
10. Place shift selector in drive D position.
11. When depressing accelerator pedal, determine if engine RPM is suppressed.
12. If TCL indicator light illuminates and engine speed is suppressed, system is functioning properly.
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