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Home >> Ford >> 2009 >> E 350 V8-6.0L DSL Turbo >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Pinpoint Tests >> Test AE: Unable To Activate Self-Test/Network Communication Error
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Test AE: Unable To Activate Self-Test/Network Communication Error

PINPOINT TEST AE: UNABLE TO ACTIVATE SELF-TEST/NETWORK COMMUNICATION ERROR


Flow Chart:






This pinpoint test is intended to diagnose the following:
- unable to communicate with the PCM
- unable to activate the PCM self-test
- harness circuits: VPWR, VREF and PWRGND


PCM Connector


PCM Connector:





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AE1 : CARRY OUT A VEHICLE INSPECTION AND VERIFY THE SELF-TEST PROCEDURE

NOTE: The scan tool resets if battery voltage is less than 9.5 volts. If carrying out repeated self-tests, disable the glow plug control module (GPCM) and disregard the glow plug codes while the GPCM is disabled. If equipped with a power take-off (PTO) system, it must be disabled while carrying out the PCM self-tests.

- Check the battery voltage
- Verify that the correct procedure was used to activate the self-test for the scan tool. Refer to Diagnostic Methods. Testing and Inspection
- Was the correct self-test procedure used?






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AE2 : CARRY OUT THE NETWORK TEST

- Ignition ON, engine OFF.
- Carry out the network test.
- Do all modules indicate pass?






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AE3 : CHECK THE PCM VPWR CIRCUITS FOR VOLTAGE

- Ignition OFF.
- PCM connector disconnected.
- Ignition ON, engine OFF.
- Measure the voltage between:







- Are the voltages greater than 10.5 V?






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AE4 : CHECK THE PWRGND CIRCUITS FOR AN OPEN

- Ignition OFF.
- Measure the resistance between:







- Are the resistances less than 5 ohms?






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AE5 : CHECK THE VREF CIRCUITS FOR A SHORT TO GROUND

- PCM connector disconnected.
- Measure the resistance between:







- Are the resistances greater than 10K ohms?





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