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Home >> Ford >> 2021 >> Expedition Platinum, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 34 (Climate Control System - General Information) >> Diagnosis And Testing >> Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) >> Pinpoint Test(s) >> Pinpoint Test Q : B1474:11, B1474:15, B147A:11, B147A:15, B147B:11, B147B:15 >> Pinpoint Test Q : B1474:11, B1474:15, B147A:11, B147A:15, B147B:11, B147B:15

Pinpoint Test Q : B1474:11, B1474:15, B147A:11, B147A:15, B147B:11, B147B:15

WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

  1. Q1 CHECK THE ELECTRIC BOOSTER HEATER RELAYS

    • Ignition OFF.

    • Disconnect Electric booster heater relay 1.

    • Disconnect Electric booster heater relay 2.

    • Disconnect Electric booster heater relay 3.

    • Carry out the component test on the electric booster heater relays. Refer to Carry out the component test on the A/C clutch relay. Refer to Component Testing for schematic and connector information.

    Did the relay pass the component test? 

    Yes  GO to  Q2
    No  INSTALL a new relay.

  2. Q2 CHECK THE ELECTRIC BOOSTER HEATER RELAY CONTROL CIRCUITS FOR A SHORT TO VOLTAGE

    • Ignition ON.

    • Measure:

      With multifunction display 

      Positive Lead Measurement / Action Negative Lead
      C2402B-7
      GFD200696Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2402B-8
      GFD200696Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2402B-9
      GFD200696Courtesy of FORD MOTOR COMPANY
      		 Ground

      Without multifunction display 

      Positive Lead Measurement / Action Negative Lead
      C2402A-15
      GFD200696Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2402A-16
      GFD200696Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2402A-17
      GFD200696Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  Q3

  3. Q3 CHECK THE ELECTRIC BOOSTER HEATER RELAY CONTROL CIRCUITS FOR A SHORT TO GROUND

    • Ignition OFF.

    • Measure:

      With multifunction display 

      Positive Lead Measurement / Action Negative Lead
      C2402B-7
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2402B-8
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2402B-9
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 Ground

      Without multifunction display 

      Positive Lead Measurement / Action Negative Lead
      C2402A-15
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2402A-16
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2402A-17
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  Q4
    No  REPAIR the circuit.

  4. Q4 CHECK THE ELECTRIC BOOSTER HEATER RELAY CONTROL CIRCUITS FOR AN OPEN

    • Measure:

      With multifunction display 

      Positive Lead Measurement / Action Negative Lead
      C2402B-7
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 R20 Electric booster heater relay 1 socket 1

      With multifunction display 

      Positive Lead Measurement / Action Negative Lead
      C2402B-8
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 R40 Electric booster heater relay 2 socket 1

      With multifunction display 

      Positive Lead Measurement / Action Negative Lead
      C2402B-9
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 R24 Electric booster heater relay 3 socket 1

      Without multifunction display 

      Positive Lead Measurement / Action Negative Lead
      C2402A-17
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 R20 Electric booster heater relay 1 socket 1

      Without multifunction display 

      Positive Lead Measurement / Action Negative Lead
      C2402A-16
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 R40 Electric booster heater relay 2 socket 1

      Without multifunction display 

      Positive Lead Measurement / Action Negative Lead
      C2402A-15
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 R24 Electric booster heater relay 3 socket 1

    Are the resistances less than 3 ohms? 

    Yes  GO to  Q5
    No  REPAIR the circuit.

  5. Q5 CHECK THE ELECTRIC BOOSTER HEATER RELAY GROUND CIRCUITS FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      R20 Electric booster heater relay 1 socket 2
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 Ground

      Positive Lead Measurement / Action Negative Lead
      R40 Electric booster heater relay 2 socket 2
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 Ground

      Positive Lead Measurement / Action Negative Lead
      R24 Electric booster heater relay 3 socket 2
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances less than 3 ohms? 

    Yes  GO to  Q6
    No  REPAIR the circuit.

  6. Q6 CHECK THE ELECTRIC BOOSTER HEATER CIRCUITS FOR A SHORT TO VOLTAGE

    • Disconnect Electric booster heater C2603 .

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2603-1
      GFD200696Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2603-3
      GFD200696Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2603-5
      GFD200696Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  Q7

  7. Q7 CHECK THE ELECTRIC BOOSTER HEATER CIRCUITS FOR A SHORT TO GROUND

    • Ignition OFF.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2603-1
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2603-3
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2603-5
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  Q8
    No  REPAIR the circuit.

  8. Q8 CHECK THE ELECTRIC BOOSTER HEATER CIRCUITS FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C2603-1
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 R20 Electric booster heater relay 1 socket 5
      C2603-3
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 R40 Electric booster heater relay 2 socket 5
      C2603-5
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 R24 Electric booster heater relay 3 socket 5

      Positive Lead Measurement / Action Negative Lead
      C2603-2
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 Ground
      C2603-4
      GFD205626Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances less than 3 ohms? 

    Yes  INSTALL a new electric booster heater. Refer to: Electric Booster Heater . TEST the system for normal operation. If the concern is still present, GO to  Q9
    No  REPAIR the circuit.

  9. Q9 CHECK FOR CORRECT FCIM (FRONT CONTROLS INTERFACE MODULE) OPERATION

    • Ignition OFF.

    • Disconnect and inspect all FCIM 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 all FCIM connectors. Make sure they seat and latch correctly.

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

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, Refer to FCIM HARDWARE TESTING .
    No  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.
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