Pinpoint Test W: A Single Climate Controlled Seat Is Inoperative

WARNING: This page is about a different car, the 2014 Lincoln MKX and 2014 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

W1 CHECK OPERATION OF BOTH CLIMATE CONTROLLED SEATS AND VERIFY THE SYMPTOM
- Check the operation of both climate controlled seats and verify the symptom.
Is only a single climate controlled seat inoperative?
- Yes : GO to W2 .
- No : If both seats are inoperative, GO to SYMPTOM CHART .
W2 CHECK FOR DCSM DTCs
- Enter the following diagnostic mode on the scan tool: Self Test - DCSM .
Were any DTCs retrieved during the self-tests?
- Yes : GO to the DUAL CLIMATE CONTROLLED SEAT MODULE (DCSM) DTC CHART .
- No : GO to W3 .
W3 CHECK OPERATION OF THE DCSM USING PIDs
NOTE: The purpose of this step is to verify the DCSM is able to receive and process inbound command messages from the network and demonstrate if the DCSM is operational. This indicates the FCIM may not be sending the commands correctly.
- Enter the following diagnostic mode on the scan tool: DataLogger - DCSM .
  Driver Seat
  - Seat cushion thermal electric device temperature (CSHTEMP)
  - Seat back thermal electric device temperature (BK_TEMP)
  - Climate-controlled seat heat command (TED_HEAT_D)
  Front Passenger Seat
  - Passenger Cushion Thermal Electric Device (TED ) Temperature (PCSHTMP)
  - Passenger Back TED Temperature (PBKTMP)
  - Passenger TED Heat Mode (TED_HEAT_P)
- NOTE: The DCSM active commands TED_HEAT_D (driver seat) and TED_HEAT_P (passenger seat) are limited to 15 seconds in the ON state.
  
  Operate the affected climate controlled seat using the active command while monitoring the appropriate PIDs for that seat.
  - When the command is in process the TED temperature PIDs on the affected seat should momentarily increase. If no temperature increase is noted, remove the cushion blower filter and repeat the active command while physically monitoring the cushion blower for fan movement.
Do the PID states or cushion blower movement indicate climate controlled seat operation when using the active command?
- Yes : GO to W4 .
- No : INSTALL a new DCSM . REFER to DUAL CLIMATE CONTROLLED SEAT MODULE (DCSM) . REPEAT the self-test.
W4 USE THE TOUCHSCREEN BUTTONS AND MONITOR THE DCSM PID FOR A RESPONSE
- Enter the following diagnostic mode on the scan tool: DataLogger - DCSM .
  - Driver State Seat Mode (DCCSMOD) (driver seat)
  - Passenger State Seat Mode (PCCSMOD) (passenger seat)
- Start the engine.
- NOTE: Operation of the climate controlled seats repeatedly on and off or repeatedly switching between heat and cool modes may cause DCSM DTCs to set, disabling one or both seat system and may require DTCs to be cleared before seat operation may continue. It is recommended to allow time between modes for seat temperatures to return toward ambient temperatures before continuing.
  
  Attempt to operate the affected climate controlled seat in all modes using the appropriate buttons on the touchscreen interface while monitoring the DCSM PID DCCSMOD (driver seat) or PCCSMOD (passenger seat).
Do all the PID states match the climate controlled seat settings selected on the touchscreen interface?
- Yes : If the fault is intermittent, CHECK for causes of the intermittent fault. INSPECT the connectors, terminals and wiring. ATTEMPT to recreate the fault by flexing the wire harness and operating the system. CHECK the electrical connectors for corrosion, poor pin contact or pushed-out pins. REPAIR any intermittent concerns found and TIGHTEN any loose DCSM connector pins. CLEAR the DTCs. REPEAT the self-test.
- No : REFER to INFORMATION AND ENTERTAINMENT SYSTEMS to diagnose the inoperative touchscreen button(s). TEST the system for normal operation.