| Subject: | Electronic Throttle Control (ETC) Adaptive Value Reset (Idle Learn) Procedure |
| Models: | 2006 Chevrolet Epica with 2.5L L6 (VIN L - RPO LBK) Engine (Canada and Export Only) |
| 2007 Chevrolet Epica with 2.0L or 2.5L L6 Engine (Export Only) |
This bulletin is being revised to delete the requirement for the engine to be fully cooled down before performing this procedure. Please discard Corporate Bulletin Number 06-06-04-032 (Section 06 - Engine).
The purpose of this bulletin is to inform dealers of a required adaptive value reset procedure (also referred to as the "idle learn procedure") for the electronic throttle control (ETC) system. If the adaptive value reset procedure is not performed
when necessary, DTC P2119 (Throttle Closed Position Performance) may set and engine RPM may fluctuate at idle.
The adaptive value reset procedure must be performed after completing any of the following procedures:
| • | ETC throttle body replacement |
| • | Cleaning/removal of carbon deposits on the throttle body |
Adaptive Value Reset (Idle Learn) Procedure
Important: Reset the adaptive values and clear DTCs with the ignition ON with the engine OFF. If the adaptive values are reset or DTCs are cleared while the engine is running, the engine may stall.
- Turn the ignition ON with the engine OFF.
- If any DTCs are stored in the ECM, clear all DTCs using a scan tool.
- Reset the adaptive values using a scan tool.
- Turn the ignition OFF for 20 seconds.
- Turn the ignition ON for 10 seconds.
- Turn the ignition OFF for 20 seconds.
- Turn the ignition ON for 10 seconds.
- Start the engine in park/neutral position.
- Turn the ignition OFF. The procedure is complete.
