The engine control module (ECM) learns the idle position of the throttle body to ensure the correct idle operation. Anytime the ECM or the throttle body is replaced, the ECM must learn the idle position. The engine idle may be unstable or a DTC may set if the idle position is not learned.
• | DTCs P0121, P0122, P0123, P0221, P0222, P0223, P0638, P2100, P2101, P2105, and P2119 are not set. |
• | The engine speed is less than 40 RPM. |
• | The vehicle speed is 0 km/h (0 mph). |
• | The accelerator pedal position is less than 14.9 percent. |
• | The ignition 1 voltage is more than 10 volts. |
• | The engine coolant temperature is between 5-85°C (41-185°F). |
• | The intake air temperature is between 5-60°C (41-140°F). |
Note:
• Ensure the above conditions are met before performing with this procedure. • Do not perform this procedure if a throttle position (TP) sensor or other throttle actuator control (TAC) system DTCs are set other than P2176. The ECM will not perform the idle learn procedure with a DTC set.