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Home >> Lincoln >> 2011 >> MKS EcoBoost >> Repair and Diagnosis (Single Page) >> Body & Frame >> Seat System - Seats >> Diagnosis And Testing >> Seats >> Pinpoint Tests >> Pinpoint Test L: A Single Climate Controlled Seat is Inoperative - Switch Indicators May or May Not Illuminate >> Pinpoint Test L: A Single Climate Controlled Seat Is Inoperative - Switch Indicators May Or May Not Illuminate

Pinpoint Test L: A Single Climate Controlled Seat Is Inoperative - Switch Indicators May Or May Not Illuminate

NOTE: When taking measurements at Dual Climate Controlled Seat Module (DCSM) harness connectors, do not insert the electrical probes into the female connector pins. Inserting the probes into connector pins can cause intermittent or open electrical connections after reassembly resulting in Diagnostic Trouble Codes (DTCs) and system failure. Touching the tip of these connector pins is recommended instead.
  1. L1 VERIFY CLIMATE CONTROLLED SEAT BLOWER OPERATION 
    • Ignition OFF.
    • Remove the driver and front passenger cushion TED filters to verify blower operation.
      • Turn the filter to the left (counterclockwise) and remove.
    • Start the engine.
    • Operate climate controlled seat buttons while verifying both blowers operate.
    • Are all climate controlled seats inoperative? 
    • Yes  : GO to SYMPTOM TABLE  to diagnose all climate controlled seats are inoperative.
    • No  : If both blowers operate, GO to  L3.

      If only one blower operates, GO to L2.

  2. L2 VERIFY CLIMATE CONTROLLED SEAT INDICATOR ILLUMINATION 
    • Verify system indicator illumination on the affected seat.
    • Do any climate controlled seat indicators illuminate or flash and then turn off on the affected seat? 
    • Yes  : GO to L3.
    • No  : For vehicles with navigation, GO to  L4.

      For vehicles without navigation, GO to  L5.

  3. L3 RETRIEVE DCSM DTCs 
    • Enter the following diagnostic mode on the scan tool: Self Test - DCSM.
    • Are any DTCs retrieved? 
  4. L4 MONITOR THE FCIM PIDs AND CHECK INPUTS 
    • Enter the following diagnostic mode on the scan tool: DataLogger - FCIM - PIDs.
      • Driver Cooled Seat (CC_SW_D_CL_S)
      • Driver Heated Seat (CC_SW_D_HSEATS)
      • Passenger Cooled Seat (CC_SW_P_CL_S)
      • Passenger Heated Seat (CC_SW_P_HSEATS)
    • Monitor the PIDs while pushing the climate controlled seat switch buttons.
    • Do the PID values agree with the switch positions? 
  5. L5 MONITOR THE HVAC MODULE PIDs AND CHECK INPUTS 
    • Enter the following diagnostic mode on the scan tool: DataLogger - HVAC module - PIDs.
      • Driver Cooled Seat (CC_SW_D_CL_S)
      • Driver Heated Seat (CC_SW_D_HSEATS)
      • Passenger Cooled Seat (CC_SW_P_CL_S)
      • Passenger Heated Seat (CC_SW_P_HSEATS)
    • Monitor the PIDs while pushing the climate controlled seat switch buttons.
    • Do the PID values agree with the switch positions? 
  6. L6 CHECK OPERATION OF THE DCSM USING ACTIVE COMMANDS 
    • 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, then turn OFF.
    • Operate the affected climate controlled seat while monitoring the appropriate PIDs.
      • When the command is in process, the TED temperature PIDs 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 movement.
    • Do the PID states or cushion blower movement indicate climate controlled seat operation? 
    • 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  : INSTALL a new DCSM. REFER to DUAL CLIMATE CONTROLLED SEAT MODULE (DCSM)  . CLEAR the DTCs. REPEAT the self-test.
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