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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? 
  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.
      Fig 1: Measuring Resistance Between HSWM C2406-8, Circuit CHS72 (YE/BU) And Ground
      G07397676Courtesy of FORD MOTOR CO.
    • 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 
    • Remove the steering column shrouds to access the clockspring connectors. Refer to STEERING COLUMN SHROUD .
    • Disconnect: Clockspring C218D.
    • Measure the resistance between HSWM C2406-8, circuit CHS72 (YE/BU), harness side and ground.
      Fig 2: Measuring Resistance Between HSWM C2406-8, Circuit CHS72 (YE/BU) And Ground
      G07397676Courtesy of FORD MOTOR CO.
    • 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 
    • Remove the driver air bag module. Refer to SUPPLEMENTAL RESTRAINT SYSTEM .
    • Disconnect: Clockspring C218E.
    • Measure the resistance between clockspring C218E-1, steering wheel side and ground.
      Fig 3: Measuring Resistance Between Clockspring C218E-1, Steering Wheel Side And Ground
      G07397678Courtesy of FORD MOTOR CO.
    • 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.
    • Remove the steering column shrouds to access the clockspring connectors. Refer to STEERING COLUMN SHROUD .
    • 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.
        Fig 4: Checking Heater Element Voltage And Ground Circuit For Short To Voltage
        G07397679Courtesy of FORD MOTOR CO.
    • 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.
      Fig 5: Checking Heater Element & Circuit Resistance
      G07397680Courtesy of FORD MOTOR CO.
    • 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.
      Fig 6: Measuring Resistance Between HSWM C2406-7, Circuit RHS72 (YE/GY) And HSWM C2406-8
      G07397680Courtesy of FORD MOTOR CO.
    • 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.
      Fig 7: Measuring Resistance Between HSWM C2406-7, Circuit RHS72 (YE/GY) And C218D-2
      G07397682Courtesy of FORD MOTOR CO.
    • Measure the resistance between HSWM C2406-8, circuit CHS72 (YE/BU), harness side and clockspring C218D-1, circuit CHS72 (YE/BU), harness side.
      Fig 8: Measuring Resistance Between HSWM C2406-8, Circuit CHS72 (YE/BU) And Clockspring C218D-1
      G07397683Courtesy of FORD MOTOR CO.
    • 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 
    • Remove the driver air bag module. Refer to SUPPLEMENTAL RESTRAINT SYSTEM .
    • Disconnect: Clockspring C218E.
    • Measure the resistance between clockspring C218E-1, steering wheel side and clockspring C218E-2, steering wheel side.
      Fig 9: Measuring Resistance Between Clockspring C218E-1, Steering Wheel Side And Clockspring C218E-2
      G07397684Courtesy of FORD MOTOR CO.
    • 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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