LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2022 >> Transit Connect Titanium, Gas/Ethanol >> Repair and Diagnosis >> External Pages >> Different car >> Section 594 (Front Seats - Diagnosis And Testing, General Procedures, Removal And Installation) >> Diagnosis And Testing >> Front Seats >> Pinpoint Test(s) >> Pinpoint Test K: Both Heated Seats Are Inoperative -- Without Heated/Ventilated Seats

Pinpoint Test K: Both Heated Seats Are Inoperative -- Without Heated/Ventilated Seats

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
  1. Refer to Wiring Diagrams CLIMATE CONTROLLED SEATS for schematic and connector information.

    Normal Operation and Fault Conditions 

    REFER to: Front Seats - System Operation and Component Description .

    Possible Sources 

    • Fuse
    • Wiring, terminals or connectors
    • HVAC module

    Visual Inspection and Pre-checks 

    • Verify the BJB fuse 38 (40A) is OK.

  2. K1 CHECK FOR HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

    • Ignition ON.

    • Using a diagnostic scan tool, perform HVAC module self-test.

    Are any HVAC module Diagnostic Trouble Codes (DTCs) present? 

    Yes  REFER to the DTC Chart.
    No  GO to  K2

  3. K2 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE HEATED SEAT CONTROL SWITCH PARAMETER IDENTIFICATIONS (PIDS)

    • Ignition ON.

    • Using a diagnostic scan tool, monitor the Parameter Identifications (PIDs) while pressing and releasing the driver and passenger heated seat control switches.

      • Access the HVAC and monitor the CC_SW_D_HSEATSPID

      • Access the HVAC and monitor the CC_SW_P_HSEATSPID

    Do the Parameter Identifications (PIDs) change when the driver and passenger heated seat control switches are pressed and released? 

    Yes  GO to  K3
    No  INSTALL a new HVAC module. REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module .

  4. K3 CHECK THE HEATED SEAT VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Disconnect: HVAC Module C228B.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C228B-1
      GFD561509Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 11 volts? 

    Yes  GO to  K4
    No  VERIFY BJB fuse 38 (40A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the possible causes of the circuit short.

  5. K4 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE OPERATION

    • Ignition OFF.

    • Disconnect and inspect all of the HVAC module connectors.

    • Repair:

      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins as necessary
      • pushed-out pins - install new pins as necessary

    • Reconnect the HVAC module connectors. Make sure they seat and latch correctly.

    • Reconnect all previously disconnected connectors.

    • Ignition ON.

    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HVAC module. REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module .
    No  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
scientia non olet · About LEMON Manuals