Reset/Learn Procedure
Reset Procedure - Performed after the throttle body is cleaned or replaced
- Ignition ON, engine OFF, perform the Idle Learn Reset in Module Setup with a scan tool.
- Engine idling, monitor the Throttle Body Idle Airflow Compensation parameter. The Throttle Body Idle Airflow Compensation value should equal 0 % and the engine should be idling at a normal idle speed.
- Clear the DTCs and return to the diagnostic that referred you here.
Learn Procedure - Performed after the ECM is programmed or replaced
- Engine idling for 3 minutes.
- Monitor the Desired Idle Speed and the actual Engine Speed with a scan tool.
- The ECM will start to learn the new idle cells and Desired Idle Speed should start to decrease.
- Ignition OFF for 60 s.
- Engine idling for 3 minutes.
- After the 3 minute run time the engine speed should return to normal. NOTE: During the drive cycle monitor the DTC information with a scan tool to verify DTC P0506 and P0507 do not set. If DTC P0506 and P0507 set, clear the DTCs so the ECM can continue to learn. If the engine idle speed has not been learned the vehicle will need to be driven at speeds above 70 km/h (44 mph) with several decelerations and extended idles.
- After the drive cycle, the engine speed should return to normal. If the engine idle speed has not been learned, turn OFF the ignition for 60 s and repeat step 6.
- Once the engine speed has returned to normal, clear DTCs and return to the diagnostic that referred you here.
Scheme 24
| Callout | Component Name |
|---|---|
| Preliminary Procedure Partially drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill) , Cooling System Draining and Filling (GE 47716) | |
| 1 | Engine Coolant Temperature Sensor CAUTION: Refer to Fastener Caution . Procedure Disconnect the electrical connector. Tighten 20 N.m (15 lb ft) |
| CAUTION |
|---|
| Refer to Fastener Caution . |
Engine Coolant Temperature Sensor Replacement
Scheme 25
| Callout | Component Name |
|---|---|
| 1 | Mass Airflow Sensor/Intake Air Temperature Sensor Electrical Connector |
| 2 | Mass Airflow Sensor/Intake Air Temperature Sensor Bolt (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten 4 N.m (34 lb in) |
| 3 | Mass Airflow Sensor/Intake Air Temperature Sensor |
| CAUTION |
|---|
| Refer to Fastener Caution . |
Mass Airflow Sensor with Intake Air Temperature Sensor Replacement
Fuel Tank Draining
Special Tools
- SA9127E-7 Fuel Pressure/Flow Adapter
- SA9804E Fuel Tank Drain Hose
For any operation requiring removal of the fuel tank, there should be no more than 11.4 L (3 gal) of fuel remaining. This minimizes the weight of the fuel tank assembly and eases handling. The fuel level can be determined by reading the fuel level gauge. A reading below 1/4 full indicates that no more than 11.4 L (3 gal) are remaining.