EGR Enable/Disable Conditions

OPERATING CONDITIONS

All of the following conditions must be met before the PCM will allow EGR operation to begin:

1. Engine running.

2. PCM in ignition control mode.

3. Transaxle in drive range.

4. Intake air temperature between -10°C and 128°C.

5. a) If Engine Coolant Temperature (ECT) was between 18°C and 36°C at engine start-up, ECT must be between 18°C and 115°C.

b) If engine coolant temperature (ECT was less than 18°C or greater than 36°C at engine start-up, ECT must be between 80°C and 115°C.

6. Manifold air pressure must be greater than a low limit, between 25 and 34 kPa depending on barometric pressure, and less than 90 kPa.

7. Engine speed between 800 and 3200 RPM.

8. Throttle position must be less than a high limit, between 19 degrees and 35 degrees depending on barometric pressure.

9. Any one of the following conditions met:

^ Vehicle speed less than 36 MPH and throttle position switch open.

^ Vehicle speed less than 36 MPH, throttle switch closed.

^ Vehicle speed 2 MPH or less and throttle position at least 1.4 degrees.

10. Fuel is not being disabled to any cylinder due to traction control or acceleration reduction.

11. No engine overtemperature condition is present.

12. If all of the EGR enable conditions have been met but the PCM determines that A/C clutch engagement is impending, EGR enable will be delayed until 0.15 second after the A/C clutch engages.