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Home >> Ford >> 2012 >> Explorer Base, 3.5 8, AWD, 6F50 >> Repair and Diagnosis >> External Pages >> Different car >> Section 10 (Engine Controls - Pinpoint Tests (Diesel)) >> Pinpoint Test FB: Charge Air Cooler Temperature (CACT) Sensor >> Test Procedure

Test Procedure

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
  1. FB1 PRELIMINARY DIAGNOSIS 
    NOTE: Diagnose circuit DTCs before range or performance DTCs.

    Are DTCs P007B, P007C, P007D, P007E or P026A present? 

    Yes No
    GO to FB2  . RETURN to ENGINE CONTROLS - SYMPTOM CHARTS (DIESEL) , Symptom Charts for further direction.
  2. FB2 CHECK FOR AN OPEN 
    • Ignition OFF.
    • CACT Sensor connector disconnected.
    • PCM-E connector disconnected.
    • Measure the resistance between:
      (+) CACT Sensor Connector, Harness Side (-) PCM-E Connector, Harness Side
      CACT - Pin 1 CACT - Pin 13
      SIGRTN - Pin 2 SIGRTN - Pin 4

    Are the resistances less than 5 ohms? 

    Yes No
    GO to FB3  . REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.
  3. FB3 CHECK FOR A SHORT BETWEEN CIRCUITS 
    • Measure the resistance between:
      (+) CACT Sensor Connector, Harness Side (-)
      CACT - Pin 1 Ground
      SIGRTN - Pin 2 Ground
    • Measure the resistance between:
      (+) CACT Sensor Connector, Harness Side (-) CACT Sensor Connector, Harness Side
      CACT - Pin 1 SIGRTN - Pin 2

    Are the resistances greater than 10K ohms? 

    Yes No
    GO to FB4  . REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.
  4. FB4 CHECK FOR A SHORT TO VOLTAGE 
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) CACT Sensor Connector, Harness Side (-)
      SIGRTN - Pin 2 Ground
      CACT - Pin 1 Ground

    Is any voltage present? 

    Yes No
    REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. GO to FB5  .
  5. FB5 INTERMITTENT CHECK 
    • Ignition ON, engine OFF.
    • Access the PCM and monitor the CAC_V (VOLT) PID.
    • While observing the PID, carry out the following:
      • Wiggle all accessible harness from the CACT sensor to the PCM and lightly tap on the sensor.
      • Wiggle the CACT sensor connector.
      • Look for sudden changes in the voltage when the harness and connector are wiggled or when the CACT sensor is tapped.

    Is a concern present? 

    Yes No
    REPAIR as necessary.
    Clear the PCM DTCs. REPEAT the self-test.    		 GO to FB6  .
  6. FB6 TEMPERATURE SENSOR CORRELATION 
    NOTE: Check temperature values while engine is at ambient temperature, cold soak the engine for a minimum of 8 hours if necessary.
    • Ignition ON, engine OFF.
    • Access the PCM and monitor the AAT (TEMP), CAC_T (TEMP), IAT11 (TEMP), ECT2 (TEMP) and EGRT11 (TEMP) PIDs.
    • The CAC_T temperature must be within the following ranges:
      • Within 10°C (18°F) degrees of the AAT reading
      • Within 16°C (28.8°F) degrees of the IAT11 reading
      • Within 20°C (36°F) degrees of the ECT2 reading
      • Within 19°C (34.2°F) degrees of the EGRT11 reading

    Is the CAC_T PID within specification? 

    Yes No
    GO to FB7  . INSTALL a new CACT sensor. Clear the PCM DTCs. REPEAT the self-test.
  7. FB7 CHECK THE CHARGE AIR COOLER (CAC) SYSTEM 
    NOTE: Visually inspect the vehicle for aftermarket accessories and performance modifications (exhaust system, turbocharger, performance chip). Refer to ENGINE CONTROL (EC) SYSTEM , Modifications to OBD Vehicles.
    • Check the CAC system for low fluid level, cracked, restricted or misrouted coolant lines, cracked or restricted heat exchanger.
    • Check the charge air cooler (CAC) and intake air systems for leaks and restrictions.

    Are any concerns present? 

    Yes No
    REPAIR or INSTALL a new component as necessary.
    Clear the PCM DTCs. REPEAT the self-test.    		 INSTALL a new CACT sensor. REFER to the appropriate Electronic Engine Controls article.
    Clear the PCM DTCs. REPEAT the self-test.
    If the concern or DTC is still present,
    GO to FB8  .
  8. FB8 CHECK FOR CORRECT PCM OPERATION 
    • Disconnect all the PCM connectors.
    • Visually inspect for:
      • pushed out pins
      • corrosion
    • Connect all the PCM connectors and make sure they seat correctly.
    • Carry out the PCM self-test.
    • Verify the concern is still present.

    Is the concern still present? 

    Yes No
    INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) . The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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