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Pinpoint Test D : DTC B135C:11 Or B135C:15

  1. D1 CHECK THE HSWM DTCs

    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self-Test - HSWM.

    Is DTC B135C:11 present? 

    Yes  GO to  D2.
    No  For DTC B135C:15, GO to  D5. For all other DTCs, REFER to the Heated Steering Wheel Module (HSWM) DTC Chart .

  2. D2 CHECK THE HEATER ELEMENT VOLTAGE CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.
    • Disconnect: HSWM C2406 .
    • Measure the resistance between HSWM C2406-8 , circuit CHS72 (YE/BU), harness side and ground.
    1. GFD56408Courtesy of FORD MOTOR COMPANY

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  D6.
    No  GO to  D3.

  3. D3 CHECK THE HEATER ELEMENT VOLTAGE CIRCUIT FOR A SHORT TO GROUND

    • Disconnect: Clockspring C218D .
    • Measure the resistance between HSWM C2406-8 , circuit CHS72 (YE/BU), harness side and ground.
    1. GFD56408Courtesy of FORD MOTOR COMPANY

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  D4.
    No  REPAIR the circuit. TEST the system for normal operation.

  4. D4 CHECK THE HEATER ELEMENT FOR A SHORT TO GROUND

    • Disconnect: Clockspring C218D .
    • Measure the resistance between clockspring C218D-1 , steering wheel side and ground.
    1. GFD56409Courtesy of FORD MOTOR COMPANY

    Is the resistance greater than 10, 000 ohms? 

    Yes  INSTALL a new clockspring. REFER to Supplemental Restraint System . TEST the system for normal operation.
    No  INSTALL a new steering wheel. REFER to Steering Wheel . TEST the system for normal operation.

  5. D5 CHECK THE HEATER ELEMENT VOLTAGE AND GROUND CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.
    • Disconnect: Clockspring C218D .
    • Disconnect: HSWM C2406 .
    • Ignition ON.
    • Measure the voltage between:
      • HSWM C2406-8 , circuit CHS72 (YE/BU), harness side and ground.
      • HSWM C2406-7 , circuit RHS72 (YE/GY), harness side and ground.
    1. GFD56410Courtesy of FORD MOTOR COMPANY

    Is any voltage present? 

    Yes  REPAIR the affected circuit. TEST the system for normal operation.
    No  GO to  D6.

  6. D6 CHECK THE HEATER ELEMENT AND CIRCUIT RESISTANCE

    • Ignition OFF. (if ignition is still ON from previous step)
    • Connect: Clockspring C218D (if previously disconnected).
    • Measure the resistance between HSWM C2406-7 , circuit RHS72 (YE/GY), harness side and HSWM C2406-8 , circuit CHS72 (YE/BU), harness side.
    1. GFD56411Courtesy of FORD MOTOR COMPANY

    Is the resistance between 1.6 and 3.1 ohms? 

    Yes  GO to  D10.
    No  If the resistance is less  than 1.6 ohms, GO to  D7. If the resistance is more  than 3.1 ohms, GO to  D8.

  7. D7 CHECK THE HEATER ELEMENT CIRCUITS FOR A SHORT

    • Disconnect: Clockspring C218D .
    • Measure the resistance between HSWM C2406-7 , circuit RHS72 (YE/GY), harness side and HSWM C2406-8 , circuit CHS72 (YE/BU), harness side.
    1. GFD56411Courtesy of FORD MOTOR COMPANY

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  D9.
    No  REPAIR the affected circuit. TEST the system for normal operation.

  8. D8 CHECK THE HEATER ELEMENT CIRCUITS FOR AN OPEN

    • Disconnect: Clockspring C218D .
    • Measure the resistance between HSWM C2406-7 , circuit RHS72 (YE/GY), harness side and C218D-2 , circuit RHS72 (YE/GY), harness side.
    1. GFD56412Courtesy of FORD MOTOR COMPANY
    • Measure the resistance between HSWM C2406-8 , circuit CHS72 (YE/BU), harness side and clockspring C218D-1 , circuit CHS72 (YE/BU), harness side.
    1. GFD56413Courtesy of FORD MOTOR COMPANY

    Are the resistances less than 5 ohms? 

    Yes  GO to  D9.
    No  REPAIR the circuit. TEST the system for normal operation.

  9. D9 CHECK THE HEATER ELEMENT RESISTANCE

    • Disconnect: Clockspring C218D .
    • Measure the resistance between clockspring C218D-1 , steering wheel side and clockspring C218D-2 , steering wheel side.
    1. GFD56414Courtesy of FORD MOTOR COMPANY

    Is the resistance between 1.6 and 3.1 ohms? 

    Yes  INSTALL a new clockspring. REFER to Supplemental Restraint System . TEST the system for normal operation.
    No  INSTALL a new steering wheel. REFER to Steering Wheel . TEST the system for normal operation.

  10. D10 CHECK THE HSWM CONNECTION

    • Disconnect and inspect all HSWM connectors.
    • Repair:
      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary
    • Reconnect the HSWM connectors. Make sure they seat and latch correctly.
    • Ignition ON.
    • Clear the DTCs.
    • Enter the following diagnostic mode on the scan tool: Self-Test - HSWM.
    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new HSWM. REFER to Heated Steering Wheel Module (HSWM) . TEST the system for normal operation.
    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.
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