Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.
KP6 CHECK THE CAC COOLANT TEMPERATURE SENSOR CIRCUITS FOR A SHORT TO VOLTAGE
• Ignition ON, engine OFF.
• Measure the voltage between:
( + ) Charge Air Cooler (CAC) Coolant Temperature Sensor Connector, Harness Side | ( - ) |
|---|---|
CACCTS - Pin 1 | Ground |
SIGRTN - Pin 2 | Ground |
Is any voltage present?
Yes | No |
|---|---|
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. | GO to KP7 . |
KP7 CAC COOLANT TEMPERATURE SENSOR INTERMITTENT CHECK
• Charge Air Cooler (CAC) Coolant Temperature Sensor connector connected.
• PCM connector connected.
• Ignition ON, engine OFF.
• Access the PCM and monitor the CACCT_V (VOLT) PID.
• While observing the PID, wiggle, shake, and bend small sections of the wiring harness while working from the sensor to the PCM.
• Lightly tap on the CAC coolant temperature sensor and wiggle the harness and connector to simulate road shock.
Does the PID reading change?
Yes | No |
|---|---|
REPAIR as necessary or INSTALL a new CAC coolant temperature sensor. REFER to the Workshop Manual Section 303-14, Electronic Engine Controls. RESET the keep alive memory (KAM), REFER to Section 2, Resetting The Keep Alive Memory (KAM). | GO to KP8 . |
KP8 CHECK THE CHARGE AIR COOLER COOLANT TEMPERATURE AND THE ENGINE COOLANT TEMPERATURE CORRELATION
Note: Check temperature values while engine is at ambient temperature, cold soak the engine for a minimum of 6 hours if necessary. Make sure the vehicle has not been in direct sun light.
Note: All PIDs may not be available on all vehicles.
• Access the PCM and monitor the CACCT (TEMP), ECT (TEMP) and ECT1 (TEMP) PIDs.
Are the temperature readings within 16.6° C (30°F) of each other?
Yes | No |
|---|---|
GO to KP14 . |
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.