Climate Controlled Seat System Recovery Mode

If the temperature at one of the TEDs  rises above 110°C (230°F) in the heat mode or 65°C (149°F) in the cool mode for more than 4 seconds, the DCSM  records an overtemperature DTC, removes voltage from the TEDs  and goes into recovery mode (blower only) for 30 seconds to cool down the TEDs  . The same occurs if a temperature difference of 60°C (108°F) or greater is seen between the backrest and cushion TEDs  on either front seat. The DCSM  continues to monitor the TEDs  while in recovery mode. If the temperature of the TEDs  does not drop to 105°C (221°F) in the heat mode or 60°C (140°F) in the cool mode after 30 seconds, the system continues to cool the TEDs  in recovery mode for up to 5 minutes. If the TEDs  cool down after 30 seconds, but before 5 minutes (checked at 4 second intervals), the system operates as normal. 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 DCSM  disables that seat (fault mode) and remains off until the ignition is cycled. Also, if the DCSM  detects temperature differential fault twice during the same ignition cycle, the DCSM  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 key cycle.