FA: AMBIENT AIR TEMPERATURE (AAT) SENSOR: PINPOINT TEST

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Bennett Wells
6 years ago
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1 2014 Ford Taurus FWD V6-35L Vehicle > Powertrain Management > Computers and Control Systems > Testing and Inspection > Pinpoint Tests FA: AMBIENT AIR TEMPERATURE (AAT) SENSOR: PINPOINT TEST FA: Ambient Air Temperature (AAT) Sensor FA: Introduction See: Computers and Control Systems > Diagnostic Trouble Code Tests and Associated Procedures > FA: Ambient Air Temperature (AAT) Sensor - Introduction FA1 CHECK FOR DTCS Are DTCs P0071, P0072, P0073 or P0074 present? - For DTC P0071, GO to FA8 - For DTC P0072, GO to FA2 - For DTC P0073, GO to FA3 GO to FA7 - RETURN to Section 3 See: Computers and Control Systems > Diagnostic Trouble Code Tests and Associated Procedures > SECTION 3: Symptom Charts, Symptom Charts for further direction FA2 INDUCING THE OPPOSITE DTC 1/12

2 te:the AAT sensor is disconnected to simulate the opposite DTC - Ignition OFF - For Focus, - Right Exterior Rear View Mirror Assembly connector disconnected - AAT Sensor connector disconnected - Ignition ON, engine OFF - Carry out the PCM self-test Is the DTC P0073 present? - For Focus, INSTALL a new Right Exterior Rear View Mirror REFER to the Workshop Manual Section , Rear View Mirrors INSTALL a new AAT sensor REFER to the Workshop Manual Section , Climate Control - Clear the PCM DTCs REPEAT the self-test - GO to FA4 FA3 INDUCING THE OPPOSITE DTC te:dtcs set as a result of the connector being disconnected 2/12

3 - Ignition OFF - For Focus, - Right Exterior Rear View Mirror Assembly connector disconnected - Connect a 5 amp fused jumper wire between the following: - AAT Sensor connector disconnected - Connect a 5 amp fused jumper wire between the following: - Ignition ON, engine OFF - Carry out the on-demand self-test Is DTC P0072 present? 3/12

4 - For Focus, INSTALL a new Right Exterior Rear View Mirror REFER to the Workshop Manual Section , Rear View Mirrors INSTALL a new AAT sensor REFER to the Workshop Manual Section , Climate Control - Clear the PCM DTCs REPEAT the self-test - GO to FA4 FA4 CHECK THE AAT AND SIGRTN CIRCUITS FOR AN OPEN - Ignition OFF - For Fiesta, - IPC connector disconnected - Measure the resistance between: - For Focus, - PCM connector disconnected 4/12

5 - Measure the resistance between: - PCM connector disconnected - Measure the resistance between: Are the resistances less than 5 ohms? - GO to FA5 - REPAIR the open circuit Clear the PCM DTCs REPEAT the self-test 5/12

6 FA5 CHECK THE AAT CIRCUIT FOR A SHORT TO GROUND - For Focus, - Measure the resistance between: - Measure the resistance between: Is the resistance greater than 10K ohms? - GO to FA6 6/12

7 - REPAIR the short circuit Clear the PCM DTCs REPEAT the self-test FA6 CHECK THE AAT AND SIGRTN CIRCUITS FOR A SHORT TO VOLTAGE - Ignition ON, engine OFF - For Focus, - Measure the voltage between: - Measure the voltage between: Is any voltage present? 7/12

8 - REPAIR the short circuit Clear the PCM DTCs REPEAT the self-test - GO to FA7 FA7 INTERMITTENT CHECK - Ignition OFF - For Fiesta, - IPC connector connected - PCM connector connected - For Focus, - Right Exterior Rear View Mirror Assembly connector connected - AAT Sensor connector connected - Ignition ON, engine OFF - Access the PCM and monitor the AAT (TEMP) PID - While observing the PID, carry out the following: 8/12

9 - Lightly tap on the sensor and wiggle the accessible harness from the sensor to the module - Wiggle the connectors - Look for sudden changes in the temperature when the sensor is tapped and the harness and connector are wiggled Is a concern present? - REPAIR as necessary - Clear the PCM DTCs REPEAT the self-test - GO to FA8 FA8 TEMPERATURE SENSOR CORRELATION te:check temperature values while engine is at ambient temperature, cold soak the engine for a minimum of 8 hours while not in direct sunlight, if necessary - Ignition ON, engine OFF - Access the PCM and monitor the AAT (TEMP), ECT (TEMP) and IAT (TEMP) PIDs Are the temperature readings within 18 C (324 F) of each other? - For Fiesta, GO to FA9 GO to FA10 9/12

10 - For Focus, INSTALL a new Right Exterior Rear View Mirror REFER to the Workshop Manual Section , Rear View Mirrors INSTALL a new AAT sensor REFER to the Workshop Manual Section , Climate Control - RESET the keep alive memory (KAM) REFER to Section 2, Resetting The Keep Alive Memory (KAM) See: Computers and Control Systems > Diagnostic Trouble Code Tests and Associated Procedures > Resetting The Keep Alive Memory (KAM) - Clear the PCM DTCs REPEAT the self-test FA9 CHECK FOR CORRECT INSTRUMENT PANEL CLUSTER (IPC) OPERATION - Disconnect all the IPC connectors - Visually inspect for: - pushed out pins - corrosion - Connect all the IPC connectors and make sure they seat correctly - Operate the system and verify the concern is still present Is the concern still present? - INSTALL a new IPC REFER to the Workshop Manual Section , Instrumentation, Message Center, and Warning Chimes - The system is operating correctly at this time The concern may have been caused by a loose or corroded connector FA10 CHECK FOR CORRECT PCM OPERATION - Disconnect all the PCM connectors 10/12

11 - 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? - INSTALL a new PCM REFER to Section 2, Flash Electrically Erasable Programmable Read Only Memory (EEPROM) See: Computers and Control Systems > Diagnostic Trouble Code Tests and Associated Procedures > Flash Electrically Erasable Programmable Read Only Memory (EEPROM), Programming the VID Block for a Replacement PCM - The system is operating correctly at this time The concern may have been caused by a loose or corroded connector 11/12

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Intake Air Temperature (IAT) Sensor

Page 1 of 5 Year = 2011 Model = Mustang Engine = 5.0L VIN = IDS Version = t Available Intake Air Temperature (IAT) Sensor This pinpoint test is intended to diagnose the following: IAT sensor (12A697) integrated