Common questions

What happens if a turbo learn is not performed?

What happens if a turbo learn is not performed?

If a TC Learn is not performed after a related turbocharger repair, the ECM will use a stored vane position value that may be invalid. The ECM may then cause a diagnostic to fail and set an invalid DTC. Certain enable criteria must be met for the ECM to perform this procedure.

When does the turbocharger learn procedure take place?

The engine control module (ECM) performs the turbocharger learn procedure automatically when the engine coolant temperature (ECT) is least 72°C (162°F) . After each ignition cycle, and before the enable criteria have been met, the ECM will use the previously learned value.

When does the turbocharger learn the vane position?

The turbocharger (TC) learns the vane positions automatically during each ignition cycle. The engine control module (ECM) performs the turbocharger learn procedure automatically when the engine coolant temperature (ECT) is least 72°C (162°F) .

If a TC Learn is not performed after a related turbocharger repair, the ECM will use a stored vane position value that may be invalid. The ECM may then cause a diagnostic to fail and set an invalid DTC. Certain enable criteria must be met for the ECM to perform this procedure.

The engine control module (ECM) performs the turbocharger learn procedure automatically when the engine coolant temperature (ECT) is least 72°C (162°F) . After each ignition cycle, and before the enable criteria have been met, the ECM will use the previously learned value.

The turbocharger (TC) learns the vane positions automatically during each ignition cycle. The engine control module (ECM) performs the turbocharger learn procedure automatically when the engine coolant temperature (ECT) is least 72°C (162°F) .

How does a GM throttle body relearn procedure?

A motor and gear reduction set inside the throttle body opens and closes the throttle plate to accomplish your request. Over time, carbon buildup can accumulate around the throttle plate, changing it’s “home” position. If the buildup occurs gradually, the PCM “learns” the new home position.

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Ruth Doyle