B3642

DTC B3642

CIRCUIT DESCRIPTION
The seat cool temperature switch is normally open. When the switch is pressed, it momentarily sends a 12-volt signal through the cool temperature switch signal circuit to the door control module. The door module then sends the cooled seat request to the heated/cooled seat module (CCSM). In response to this signal, the heated/cooled seat module activates the cooled seat mode.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B3642 Seat Cooler Switch Circuit

CONDITIONS FOR RUNNING THE DTC
The door module must be powered and cannot have B1327 - Battery Voltage Low or B1328 - Battery Voltage High set as an active DTC for this DTC to set.

CONDITIONS FOR SETTING THE DTC
If the door module detects that the seat cool temperature switch input circuit is active for 30 continuous seconds, the switch will be considered shorted and the DTC will set.

ACTION TAKEN WHEN THE DTC SETS
No other heated/cooled seat switch activations shall be recognized as a result of this switch circuit being active.

CONDITIONS FOR CLEARING THE DTC
The DTC automatically clears when the switch circuit setting the DTC is no longer active.

TEST DESCRIPTION

Steps 1 - 10:

The number below refers to the step number on the diagnostic table.
2. This step checks the existing state of the seat cool temperature switch by using the current state of the input parameter.