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.
Z4 COLLECT ANY SYMPTOM RELATED DATA TO AID IN VERIFICATION
• Prepare the freeze frame data for use with information from the Section 3 , Symptom Charts.
• Check for continuous memory DTCs that should have been recorded from an earlier pinpoint test.
• Access the information from the customer information worksheet and the customer if available. Access any other symptom related data available, such as TSBs and OASIS reports.
Is all available data recorded?
Yes | No |
|---|---|
GO to Z5 . | GATHER as much data as possible to aid in isolating the intermittent concern area. REPEAT the test step. GO to Z4 . |
Z5 RECREATE THE SYMPTOM USING ALL AVAILABLE DATA
Note: To recreate the original conditions that set the DTC or caused the symptom, the vehicle may require driving.
• With the scan tool, select and monitor the same PIDs as displayed in freeze frame along with any previously selected PIDs/signals from step Z2. Using the freeze frame data recorded earlier, recreate the conditions described by each freeze frame PID. Pay special attention to ECT, LOAD, RPM and VSS. Also, use any available data from the customer, TSBs, and other sources to aid in producing the correct conditions for recreating the symptom.
• When the symptom occurs, press the trigger to begin recording. Refer to the scan tool instruction manual for information on the recorder function.
Can the symptom be recreated?
Yes | No |
|---|---|
GO to Z10 . | GO to Z6 . |
Z6 RECREATE THE SYMPTOM
Note: PIDs for output in the Reference Value Charts represent command values only. Circuit measurements with a DMM indicate the actual output status. Therefore, in the case of a concern, the PID and circuit reading on the vehicle may not correspond with each other. PIDs for PCM circuits with a mismatch in the DMM measurement indicate a possible PCM concern.
• The road test is the last attempt to locate the area of concern before physically disturbing vehicle circuits.
• The Intermittent Road Test Procedure is a set of instructions for monitoring PIDs/signals with a scan tool and circuit measurements with a DMM. This is done under 4 different conditions - ignition on and engine off, hot idle, 48 km/h (30 mph) and 88 km/h (55 mph). Use the typical diagnostic reference values from Section 6 , Reference Values to compare with the actual vehicle.
• Locate the correct reference value chart in Section 6 , Reference Values.
• Setup the vehicle to measure the circuits with a DMM and a scan tool.
• Connect a scan tool to the DLC.
• Ignition ON, engine OFF.
• With the scan tool, select and monitor PIDs and measure the circuits shown in the reference value chart in Section 6 , Reference Values.
• Compare the scan tool PIDs and DMM values to the reference value charts.
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.