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.
3-2 Symptom Charts
Powertrain Control Module (PCM) Quick Test | QT |
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Powertrain Control Module (PCM) Quick Test
PINPOINT TEST QT: Powertrain Control Module (PCM) Quick Test
Test Step | Results / Action to Take |
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QT1 CARRY OUT THE PCM QUICK TEST
NOTE: Verify the battery state of charge (SOC) is greater than 70% before diagnosing any auto stop start concerns. Refer to the Workshop Manual Section 414–00, Charging System, for additional information.
NOTE: For vehicles indicating not ready for inspection maintenance (I/M) testing, refer to the Owner Literature, Readiness For Inspection/Maintenance (I/M) Testing to complete the system readiness. If an I/M testing system readiness concern is still present, GO to Pinpoint Test QC.
NOTE: If the vehicle was brought in with an emission compliance concern, GO to Pinpoint Test EM.
NOTE: Yes For applications that use a stand alone transmission control module GO to Section 4, Diagnostic Trouble Code (DTC) (TCM), the PCM does not output TCM related diagnostic trouble codes Charts and Descriptions for direction to repair DTCs (DTCs). Refer to the Workshop Manual Section 307-01, Automatic after noting the following: Transmission, to continue diagnosis. DIAGNOSE the DTCs in the following order (begin
diagnosis with the first DTC output in that mode and
NOTE: diagnose any circuit related DTCs first). For multiple If unable to access the PCM DTCs, or a scan tool communication concern circuit DTCs that are set as a result of a concern with exists, GO to Pinpoint Test QA in Section 5. For additional information on more than one component, REFER to the Wiring retrieving malfunction indicator lamp (MIL) and non-MIL DTCs, refer to Diagrams Manual Electronic Engine Controls Cell and Section 2, Quick Test Description for the Continuous Memory Self-Test. identify the common cause such as SIGRTN, VREF, or
VPWR. CONTINUE DTC diagnosis by referring to the
• Complete the preliminary checks looking for obvious concerns that appropriately identified pinpoint test.
may relate to the symptom. Check for the following items:
• Any KOEO self-test DTCs.
— fuses • Any KOER self-test DTCs. — electrical circuits and connectors • Any continuous memory self-test DTCs. Retrieve — vacuum lines (leaks, routing) any available freeze frame data and disregard any — air intake system (leaks, restrictions) identical/related continuous DTCs already — fuel quality (octane, contamination, winter/summer blend) repaired. — cooling system (engine operating at correct temperature) — oil quality (contamination and correct maintenance) No
• Access any related Online Automotive Service Information System GO to No Diagnostic Trouble Codes (DTCs) Present
(OASIS) or Technical Service Bulletin (TSB) information (if available). Symptom Chart Index for direction to the correct
• Carry out the PCM self-test to access any DTCs. Record any key ON symptom chart in No Diagnostic Trouble Codes (DTCs)
engine OFF (KOEO), key ON engine running (KOER) (if the engine Present Symptom Charts. runs) and continuous memory (MIL and non-MIL) DTCs. If the symptom is not listed, REFER to the applicable
• Are any DTCs present? Workshop Manual Section to continue diagnosis.
2016 Powertrain Control/Emissions Diagnosis, Gasoline Engines, 3/2015
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.