Climate Controlled Seat Recovery Mode

If the temperature of one of the blower motors rises above 110°C (229.8°F) in the heat mode or 65°C (148.9°F) in the cool mode for more than 4 seconds, the SCME records an overtemperature DTC, removes voltage from the Thermo-Electric Devices (TEDs) (part of the blower motor assembly) and goes into recovery mode (blower only) for 30 seconds to cool down the Thermo-Electric Devices (TEDs). The same occurs if a temperature difference of 60°C (108°F) or greater is detected between the backrest and cushion blower motors on either front seat. The SCME continues to monitor the Thermo-Electric Devices (TEDs) while in recovery mode. If the temperature of the Thermo-Electric Devices (TEDs) does not drop to 105°C (220.8°F) in the heat mode or 60°C (139.9°F) in the cool mode after 30 seconds, the system continues to cool the Thermo-Electric Devices (TEDs) in recovery mode for up to 5 minutes. If the Thermo-Electric Devices (TEDs) cool down after 30 seconds, but before 5 minutes (checked at 4 second intervals), the system is operating normally. An overtemperature DTC is still recorded even if the system recovers and is operating normally. This is more likely to occur during extreme cabin temperatures with significant seat back sun load. If the system does not recover within 30 seconds in heat mode or within 5 minutes in cool mode, the SCME disables that seat (fault mode) and remains off until that feature is reactivated by the customer. Also, if the SCME detects a temperature differential fault twice during the same ignition cycle, the SCME disables the seat. When a fault causes a shutdown, the climate controlled seat indicators turn off and that seat is not operational until the next ignition cycle.