Question about Cars & Trucks
Cluster under radio that controls heated seats,air and heat quit working and wont light up
Posted by Anonymous on
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Posted on Jan 02, 2017
Fuse # 20, located in the Junction Block (interior, drivers side). This is a ten amp fuse.
Read the information at the above site. The TSB (technical service bulletin) may be of interest to you.
Posted on Nov 20, 2008
You may try cleaning the filters and checking for loose connections. Heat and cooling filters should be changed or cleaned with some regularity. Like an air conditioner, these things require maintenance that are often overlooked.
Posted on Jan 16, 2009
I will post it in 2 different posts because its too long DB
HEATED SEAT SYSTEM
Individually controlled driver and passenger side electrically heated front seats are available factoryinstalled optional equipment on this model, when it is also equipped with the power seat option. The heated seat system allows both the driver and the front seat passenger the option to select one of two seat heating ranges, Low or High, or to turn the individual seat heaters OFF using the heated seat switches located in the center lower bezel near the bottom of the instrument panel center stack. The heated seat switch circuit operates on ignition switched battery current supplied through a fuse in the junction block, only when the ignition switch is in the ON position.
The heated seat system consists of the following components
The electronic modules that may affect heated seat system operation are as follows:
The heated seat system will only operate when the ignition switch is in the ON position, and the surface temperature at the front seat heating element sensors is below the designed temperature set points of the system. The heated seat system will not operate in ambient temperatures greater than about 41 °C (105 °F) . The front seat heating elements and sensors are hard wired to the Heated Seat Module (HSM) or the Memory Heated Seat Module (MHSM).
The heated seat switches are hard wired to the Body Control Module (BCM). The BCM monitors the heated seat switch inputs, then sends heated seat switch status messages to the HSM or MHSM over the Programmable Communications Interface (PCI) data bus. The HSM or MHSM contains the control logic for the heated seat system. The HSM or MHSM responds to the heated seat switch status messages, ignition switch status messages, and the front seat heating element sensor inputs by controlling the output to the front seat heating elements through integral solid-state relays.
When a seat heater is turned ON, the sensor located on the seat cushion electric heater element provides the HSM or MHSM with an input indicating the surface temperature of the seat cushion. If the surface temperature input is below the temperature set point for the selected Low or High heated seat switch position, the HSM or MHSM energizes the integral solid-state relay, which supplies battery current to the heating elements in the seat cushion and back. When the sensor input indicates the correct temperature set point has been achieved, the HSM or MHSM de-energizes the solid-state relay. The HSM or MHSM will continue to cycle the solid-state relay as needed to maintain the temperature set point.
The HSM or MHSM and the seat heater elements operate on non-switched battery current supplied through the power seat circuit breaker in the junction block. However, the HSM or MHSM will automatically turn OFF the heating elements if it detects an open or short in the sensor circuit, a short or open in the heating element circuit causing an excessive current draw, or when the ignition switch is turned to the OFF position.
See the owner's manual in the vehicle glove box for more information on the features, use and operation of the heated seat system.
I WILL POST THE REST
Posted on Feb 03, 2009
Remove fuses 10 and 11 in the underhood junction box. Leave out for 5 minutes then reinstall. If the seats start working your Zephyrs dual climate control seat module will need replaced.
Posted on Jul 03, 2009
SOURCE: Heated seat
It is the heatling element, stock elements have a single wire snaked through the element and when the circuit breaks it is done, aftermarket elements have a wired grid that if one area fails it still works, they also spread a more even heat.
Posted on Oct 09, 2009
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In order to obtain conclusive testing of the heated seat system, the Controller Area Network (CAN) data bus system must be checked.
The most reliable, efficient and accurate means to diagnose the heated seat system requires the use of a Scan Tool and the Service and Body Diagnostic Information.
Diagnostic logic is built in to the seat module and the instrument cluster (CNN) to help the person trying to locate the problem by the most efficient means possible. Anytime a problem is suspected, a Scan Tool should be obtained and used to retrieve any stored fault codes in the heated seat module and/or instrument cluster.
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