A5 CHECK THE PCM TEMPERATURE SENSOR OUTPUT
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C379-1 | Ground |
Is the voltage approximately 5 volts?
Yes | INSTALL a new differential oil temperature sensor. |
|---|---|
No | GO to A6 |
A6 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE)
Ignition OFF. Disconnect all PCM connectors. Check for the following:
corrosion (install new connector or terminals – clean module pins) damaged or bent pins – install new terminals/pins pushed-out pins – install new pins as necessary
Reconnect all PCM connectors. Make sure they seat and latch correctly. Operate the system and determine if the concern is still present.
Is the concern still present?
Yes | CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new PCM. REFER to: Powertrain Control Module (PCM) (303-14D Electronic Engine Controls - 5.2L 32V Ti-VCT, Removal and Installation). PROGRAM the PCM with the latest calibration level. REFER to: Transmission Strategy Download (307-01 Automatic Transmission - 6-Speed Automatic Transmission - 6R80, General Procedures). |
|---|---|
No | The system is operating correctly at this time. The concern may have been caused by module connections. Address the root cause of any connector or pin issues. |
DTC P1889 or P188A
Refer to Wiring Diagrams Cell 25 for schematic and connector information.
Normal Operation and Fault Conditions
When the differential oil temperature reaches a predetermined level, the PCM grounds the differential oil pump relay which activates the differential oil pump. Once the oil temperature is reduced to another predetermined level, the PCM stops grounding the relay. While the relay is activated, the PCM continues to monitor the differential oil temperature and expects to see a reduction in the temperature. If the PCM does not see a reduction in the temperature or if the temperature continues to rise, a DTC is set. Blocked air flow through the oil cooler, a blockage or restriction in the cooling hoses/tubes or an inoperative oil pump all contribute to poor cooling system
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.