LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 5 (Engine Controls - Pinpoint Tests (Diesel)) >> Pinpoint Tests FB: Charge Air Cooler Temperature (CACT) Sensor >> Test Procedure

Test Procedure

WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. FB1 PRELIMINARY DIAGNOSIS 
    NOTE: Diagnose circuit faults prior to range or performance faults.

    Is DTC P007B, P007C, P007D or P026A present? 

    Yes No
    GO to  FB2. GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS .
  2. FB2 CHECK FOR VOLTAGE AT THE SENSOR 
    • Ignition OFF.
    • CACT Sensor connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) CACT Sensor Connector, Harness Side (-) CACT Sensor Connector, Harness Side
      CACT - Pin 1 SIGRTN - Pin 2

    Is the voltage between 4 - 6 V? 

    Yes No
    GO to  FB3. GO to Pinpoint Test B .
  3. FB3 CHECK FOR AN OPEN IN THE HARNESS 
    • Measure the resistance between:
      (+) CACT Sensor Connector, Harness Side (-) PCM-E Connector, Harness Side
      CACT - Pin 1 CACT - Pin 13

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  FB4. REPAIR the open circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  4. FB4 CHECK FOR A SHORT BETWEEN CIRCUITS IN THE HARNESS 
    • Ignition OFF.
    • PCM-E connector disconnected.
    • Measure the resistance between:
      (+) CACT Sensor Connector, Harness Side (-)
      CACT - Pin 1 Ground
    • Measure the resistance between:
      (+) CACT Sensor Connector, Harness Side (-) CACT Sensor Connector, Harness Side
      CACT - Pin 1 SIGRTN - Pin 2

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  FB5. REPAIR the short circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  5. FB5 CHECK FOR A SHORT TO VOLTAGE IN THE HARNESS 
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) CACT Sensor Connector, Harness Side (-)
      CACT - Pin 1 Ground

    Is any voltage present? 

    Yes No
    REPAIR the short circuit. Clear the PCM DTCs.
    REPEAT the self-test.    		 GO to  FB6.
  6. FB6 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  FB7.
  7. FB7 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  FB8. INSTALL a new CACT sensor. Clear the PCM DTCs. REPEAT the self-test.
  8. FB8 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  FB9.
  9. FB9 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.
scientia non olet · About LEMON Manuals