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.
For all others, GO to H10 .
H7 MONITOR THE KOEO AND KOER MAP SENSOR VOLTAGE
• Ignition ON, engine OFF.
• Access the PCM and monitor the MAP_V (VOLT) PID.
• Record the MAP voltage.
• Ignition ON, engine running.
• Record the MAP voltage.
Does the PID value change?
Yes | No |
|---|---|
For Ecosport and KA with DTC P2195, GO to H11 . For DTCs P0171, P0174, P219C, P219D, P219E, P219F, P21A0 or P21A1, GO to H11 . For all others, GO to H10 . | GO to Pinpoint Test DM . |
H8 LOCATE THE VACUUM LEAK
NOTICE: Do not clamp or pinch a hard plastic hose. Use a vacuum cap or equivalent to restrict the hose.
Note: Restricting the EVAP vapor hose while the EVAP emission canister is purging may shift the SHRTFT. Carry out a visual inspection as necessary.
Note: When monitoring for a decrease in the SHRTFT PIDs in the following steps, if SHRTFT1 equals +15% and the hose is restricted, SHRTFT1 decreases to -7%. The total decrease in the SHRTFT PIDs equals 22%.
• Locate the vacuum tees for the intake air and PCV systems.
• Ignition ON, engine running.
• Access the PCM and monitor the SHRTFT1 (PER) and SHRTFT2 (PER) PIDs.
• Restrict the vacuum lines one at a time for 30 seconds. If a vacuum leak is present, the SHRTFT PID values decrease as the hose is restricted.
Is the decrease in the SHRTFT PIDs greater than 15 percent when one of the vacuum hoses is restricted?
Yes | No |
|---|---|
GO to H9 . | INSPECT the intake air system for a vacuum leak in the intake manifold or intake gaskets. REPAIR as necessary. For repair verification, GO to H9 . |
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.