A/C Not Cold, Compressor Does Not Turn Back On After Full Throttle Acceleration (Reprogram ECM)
| Subject: | A/C Not Cold, Compressor Does Not Turn Back On After Full Throttle Acceleration (Reprogram ECM) |
| Models: | 2007-2008 Chevrolet Caprice, Lumina |
| with V8 Engine |
| Built Prior to 4/26/07 |
Condition
Some customers may comment that the A/C is not cold and/or that the compressor does not turn back on after full throttle acceleration.
Under full throttle acceleration, the ECM disables the air conditioning (A/C) compressor. This is normal operation. However, in some circumstances, the ECM may fail to switch the A/C compressor back on when normal driving resumes. Turning the HVAC controls off or cycling the ignition temporarily corrects this condition.
Do not confuse this condition with a faulty A/C module which would be evidenced by the condenser fan not operating.
Cause
This condition may be caused by ECM software that does not reinitiate A/C compressor operation.
Correction
After verifying that the vehicle has the condition described above and that there are no other causes of poor A/C performance, reprogram the engine ECM using SPS from TIS2Web or TIS DVD #8 or later.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
J6355 | Engine ECM A/C Compressor - Reprogram | 0.4 hr |
