For 1990-2009 cars only
The instrument panel integration module (IPM) can operate the blower motor in afterblow mode after the engine has been turned OFF. The afterblow mode can be enabled using the scan tool. This operation of the blower motor dries the evaporator core which reduces the amount of microbial growth which can create undesirable odors.
When the afterblow mode has been enabled the blower motor will pulse ON four times for 20 seconds, with 10 minutes between pulses. The following conditions must be met for afterblow to operate:
| • | The ambient air temperature is at least 21°C (70°F). |
| • | The A/C compressor was operating for longer than 3 minutes. |
| • | The engine has been turned off for at least 30 minutes. |
| • | The system voltage is at least 12 volts. |
Afterblow Mode Enabling Procedure
The scan tool must be used to enable IPM afterblow mode operation.
- Install a scan tool.
- Turn ON the ignition, with the engine OFF.
- Select Heating and Air Conditioning.
- Select Special Functions.
- Select Set Options.
- Select Afterblow.
- Select YES to enable the afterblow.
