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.
Z: Intermittent
Z: Introduction
Z1 DIRECTION FOR INTERMITTENT DIAGNOSTIC PATH
Note: Proceed with this step only if the PCM DTCs and the freeze frame data have not been cleared. Record freeze frame data prior to clearing the PCM DTCs. Clearing the DTCs clears any freeze frame data and eliminates FMEM. This helps to recreate the original conditions that set the DTCs or caused the symptom.
• Ignition ON, engine OFF.
• Clear the PCM DTCs.
Are the PCM DTCs cleared?
Yes | No |
|---|---|
GO to Z2 . | RESET the keep alive memory (KAM). REFER to Section 2, Resetting The Keep Alive Memory (KAM). REPEAT the self-test. |
Z2 SELECT THE PIDS AND/OR SIGNALS RELATED TO THE SYSTEM
• A list of related PIDs and/or signals are needed for use with the scan tool to monitor the suspect areas. Obtain the customer symptom description. Use the Reference Value Symptom chart and proceed to the Reference Value PID/Signal Measurement chart located at the beginning of Section 6 , Reference Values.
• Highlight each available PID/signal recommended by the charts under the PID/signal selection menu on the scan tool.
Are all available PIDs/signals related to the symptom selected?
Yes | No |
|---|---|
GO to Z3 . | REPEAT the test step. GO to Z2 . |
Z3 DECISION TO VERIFY THE SYMPTOM
Note: The path to symptom verification is optional but is recommended for several reasons. For example, the vehicle is back for a repeat repair, or there is no DTC present.
Is a concern or symptom present?
Yes | No |
|---|---|
GO to Z10 . | GO to Z4 . |
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.