Pinpoint Test Q : One Or Both Climate Controlled Seats Are Inoperative: Notes

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

Refer to Climate Controlled Seats , for schematic and connector information.

Normal Operation

The Front Seat Climate Control Module (SCME) is supplied voltage from BJB fuse 67 (40A) to C3265A pin E, circuits SBB67 (BU/RD) and C3265A pin F, circuit SBB67 (BU/RD). The Front Seat Climate Control Module (SCME) is supplied ground from C3265A pin M, circuit GD138 (BK/WH). Both voltage supply circuits are hot at all times, but the climate controlled seat system only operates with the engine running. The system can be operated with the ignition ON engine OFF by using a scan tool to bypass the climate controlled seat switches on the FCIM or touchscreen. Commanding a heat or cool mode operation in this manner will only operate in 15-second intervals. Both voltage supply circuits are spliced together internal to the Front Seat Climate Control Module (SCME), so if one circuit becomes open, both seats can still be operated. However, if a fault occurs setting a DTC specific to either climate controlled seat, only the affected seat will be disabled by the Front Seat Climate Control Module (SCME).

The Front Seat Climate Control Module (SCME) receives all control commands over the CAN communication circuits from the FCIM or touchscreen which contains the climate controlled seat buttons. The climate controlled seat system can only operate if the FCIM or touchscreen and Front Seat Climate Control Module (SCME) are communicating correctly on the CAN circuits.

This pinpoint test is intended to diagnose the following:

Wiring, terminals or connectors
MS-CAN fault
Touchscreen
FCIM
Front Seat Climate Control Module (SCME)