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.
REPAIR as necessary. Clear the PCM DTCs. REPEAT the self-test. | Unable to duplicate or identify the concern at this time. GO to Pinpoint Test Z . |
DL9 INTERMITTENT CHECK
• Ignition OFF.
• CHT Sensor connector connected.
• Ignition ON, engine OFF.
• Access the PCM and monitor the CHT (TEMP) PID.
• While observing the PID, carry out the following:
◾ Tap on the sensor to simulate road shock ◾ Wiggle the sensor connector
Is there a large change in the PID value?
Yes | No |
|---|---|
REPAIR as necessary. Clear the PCM DTCs. REPEAT the self-test. | For DTC P1285, GO to DL10 . For all others, Unable to duplicate or identify the concern at this time. GO to Pinpoint Test Z . |
DL10 CHECK THE CHT SENSOR OPERATION
Note: The engine temperature warning indicator (gauge or lamp) is a warning system that gives the driver information during an engine overheating condition. The PCM monitors the CHT sensor and determines if fail-safe cooling mode is needed. If fail-safe cooling mode is needed, the PCM sends a controller area network (CAN) message to the instrument cluster to signal an overheating condition. This causes the instrument cluster indicator to illuminate and forces the temperature gauge to the H (hot) zone. DTC P1285 is stored in the PCM.
• Run the engine until the engine temperature stabilizes.
• Verify the radiator hoses are hot and the cooling system is pressurized.
• Carry out the PCM self-test.
Is DTC P1285 present?
Yes | No |
|---|---|
REFER to the Workshop Manual Section 303- 03, Engine Cooling to diagnose the cooling system concern. Clear the PCM DTCs. REPEAT the self-test. | The system is operating correctly at this time. REPAIR any other DTCs as necessary. Clear the PCM DTCs. REPEAT the self-test. |
DL11 CHECK THE SENSOR OPERATION
• Run the engine until the engine temperature stabilizes.
• Verify the radiator hoses are hot and the cooling system is pressurized.
• Access the PCM and monitor the CHT (TEMP) PID.
• Record the PID value.
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.