3. Make sure the transmission fluid level is correct.
4. With the selector lever in (D), moderately accelerate from stop to 80 km/h (50 mph) allowing the transmission to shift into 6th gear. Keep vehicle speed and throttle steady for a minimum of 15 seconds.
5. With the transmission in 6th gear and maintaining steady speed and throttle, lightly apply and release the brake to operate stoplamps. Maintain the speed and throttle for a minimum of 5 seconds.
6. Brake to a stop and remain stopped for a minimum of 20 seconds.
7. Repeat Steps 4 through 6 five times.
8. Perform a self-test and record DTCs.
If DTCs are present, repair all non-transmission DTCs first as they can directly affect the transmission operation. Repeat the self-test and road test the vehicle to verify the repair. Clear the DTCs. Perform the drive cycle test and repeat the self-test after completing the repair. Refer to: Diagnostic Trouble Code (DTC) Charts and Pinpoint Tests - 2.3L EcoBoost (201kW/273PS) . Refer to: Diagnostic Trouble Code (DTC) Charts and Pinpoint Tests - 3.7L Duratec (227kW/301PS) . Refer to: Diagnostic Trouble Code (DTC) Charts and Pinpoint Tests - 5.0L 32V Ti-VCT .
If the tests pass and a concern is still present, refer to Diagnosis By Symptom, OASIS messages and TSB regarding concern. Refer to: Diagnosis By Symptom .
NOTE: The vehicle wiring harness, PCM and non-transmission sensors may affect transmission operations. Repair these concerns first.
9. Repair all DTCs after the OBD test procedures are completed. Begin with non-transmission related DTCs, then repair any transmission related DTCs. Use the DTC Chart for information on condition and symptoms. The pinpoint tests are used in diagnosing transmission electrical concerns. Make sure the vehicle wiring harness and the PCM are diagnosed as well. The Engine Controls article aids in diagnosing non-transmission electronic components. Refer to: Diagnostic Trouble Code (DTC) Charts and Pinpoint Tests - 2.3L EcoBoost (201kW/273PS) . Refer to: Diagnostic Trouble Code (DTC) Charts and Pinpoint Tests - 3.7L Duratec (227kW/301PS) . Refer
Original technical text and illustrations, formatted as HTML. Follow the engine, transmission, equipment, model and year specified in the source. Import and layout checks do not establish applicability to every 2015–2017 Mustang. About this collection.