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.
REPAIR as necessary. VERIFY the repair. Clear the PCM DTCs. REPEAT the self-test. | GO to Z17 . |
Z17 KOEO WATER SOAK TEST PROCEDURE FOR THE PCM ACTUATORS, EXCLUDING HIGH VOLTAGE CIRCUITS
WARNING: WHEN CARRYING OUT ANY TEST STEPS, ALWAYS BE AWARE OF HANDS, CLOTHING OR TOOLS NEAR COOLING FANS, BELTS OR HOT SURFACES. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY.
Note: Remember that PIDs selected from the PCM PIDS/SIGNALS Chart display commanded values only. A DMM measurement is needed to display the actual values. Be sure to compare them. Look for fluctuations to occur during any part of the following test. The output state test may not control some outputs, such as injectors and ignition coils and may not be available for all actuators.
• Ignition ON, engine OFF.
• With the scan tool, turn on selected outputs using output state control. Refer to the scan tool instruction manual.
• Proceed to the area of the suspect wiring or component concern.
• Monitor the PID or DMM values while lightly spraying a water mist on the component.
• Look for abrupt changes in the values. Compare these actual values to the reference values in Section 6 , Reference Values.
Is there a mismatch between command and actual or are any values fluctuating in and out of range when compared to the reference value charts in Section 6 , Reference Values?
Yes | No |
|---|---|
REPAIR as necessary. VERIFY the repair. Clear the PCM DTCs. REPEAT the self-test. | GO to Z18 . |
Z18 KOER WATER SOAK TEST PROCEDURE FOR THE PCM ACTUATORS
WARNING: WHEN CARRYING OUT ANY TEST STEPS, ALWAYS BE AWARE OF HANDS, CLOTHING OR TOOLS NEAR COOLING FANS, BELTS OR HOT SURFACES.
FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY.
• Ignition ON, engine running.
• Using the circuits chosen from the PCM PIDS/SIGNALS Chart, select only the recommended PIDs/signals to monitor with the scan tool. If a PID is not available for the circuit, use a DMM to check the value.
• Proceed to the area of the suspect wiring or component concern.
• Monitor the PID or DMM values while lightly spraying a water mist on the component.
• Monitor while spraying the sensor harness wire from the component to the PCM/TCM.
• Look for abrupt changes in the values. Compare these actual values to the Typical Diagnostic Reference Values in Section 6 .
Is there a mismatch between command and actual or are any values fluctuating in and out of range when compared to the Reference Value Charts in Section 6?
Yes | No |
|---|---|
GO to Z19 . |
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.