Z: Intermittent Z: Introduction — 2016 workshop reference 5350

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.

• Highlight only the PIDs/signals from step Z2.

• Proceed to the PCM PIDS/SIGNALS chart located at the beginning of this test.

• Match the selected PIDs/signals to the corresponding circuit in the chart. There may be more than one circuit to test. If a PID/signal recording was made with the scan tool, it may be helpful to replay it at this time. Refer to the scan tool instruction manual for additional information.

Has a test been chosen?

Yes	No
For the input test step, GO to Z11 . For the output test step, GO to Z15 .	RETURN to Section 3 , Symptom Charts for further direction.

Yes

For the input test step, GO to Z11 .

For the output test step, GO to Z15 .

RETURN to Section 3 , Symptom Charts for further direction.

Z11 KOEO INPUT TEST PROCEDURE FOR THE PCM SENSORS

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.

• Using the circuits chosen from the Section 6 , 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.

• Ignition ON, engine OFF.

• If the input is a switch type-component, turn it on manually.

• Monitor the PID or DMM while tapping on the component.

• Monitor while wiggling the sensor harness wire from the component to the PCM/TCM.

• Look for abrupt changes in the values. Compare these actual values to the reference values in Section 6 , Reference Values.

Are there abrupt changes in the PID values that do not compare with the Section 6 , typical reference values?

Yes	No
REPAIR as necessary. VERIFY the repair. Clear the PCM DTCs. REPEAT the self-test.	GO to Z12 .

Yes

REPAIR as necessary. VERIFY the repair.

Clear the PCM DTCs. REPEAT the self-test.

GO to Z12 .

Z12 KOER INPUT TEST PROCEDURE FOR THE PCM SENSORS

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.

• Continue to monitor the PIDs and circuits as in the previous step.

• Proceed to the area of the suspect wiring or component concern.

• If the input is a switch type-component, turn it on manually.

• Monitor the PID or DMM while tapping on the component.

• Monitor while wiggling the sensor harness wire from the component to the PCM.

• Look for abrupt changes in the values. Compare these actual values to the reference values in Section 6 , Reference Values.

Are any values fluctuating in and out of range?

Yes	No

Source reference 5350

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.