QA: Unable To Activate Self-Test/Network

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.

2016 PCED Gasoline Engines SECTION 5: Pinpoint Tests

Procedure revision date: 11/23/2015

QA: Introduction

Communication Error

QA1 CARRY OUT A VEHICLE INSPECTION AND VERIFY THE SELF-TEST PROCEDURE

Note: If the self-test or communication concern occurred after a failed or an aborted reprogram, the module may be blank. Attempt to reprogram the module again before continuing with this pinpoint test.

• Visually inspect the following for obvious signs of electrical damage:

◾ harness wiring ◾ electrical connections

• Verify the correct procedure was used to activate the self-test for the scan tool. Refer to Section 2, Scan Tool Setup And Functionality.

Was the correct self-test procedure used?

Yes	No
GO to QA2 .	REFER to Section 2, Scan Tool Setup And Functionality.

QA2 CARRY OUT THE NETWORK TEST

Note: When using Integrated Diagnostic System (IDS), the scan tool attempts to communicate with the PCM first. After establishing communication with the PCM, the scan tool then attempts to communicate with all modules on the vehicle. If an IDS session cannot be established, IDS may state no communication can be established with the PCM:

◾ choose No when the scan tool prompts whether or not to retry communication. ◾ enter a PCM part number, tear tag or calibration number to identify the vehicle and start a

session. The PCM part number and 4-character tear tag are located on the PCM.

• Ignition ON, engine OFF.

• Carry out the network test.

Do all modules indicate pass?

Yes	No
For DTCs U0101, U0402, U1011 or U1013, GO to QA7 . For DTC U0104, GO to QA12 . For DTCs P1935, U0121, U0415, U1012 or U1039, GO to QA8 . For DTC U0138, GO to QA13 .	If only PCM indicates fail, GO to QA3 . For network test or all other modules indicates fail, REFER to the Workshop Manual Section 418-00, Module Communications Network, to diagnose the PCM does not respond to the scan tool or no high speed controller area network (CAN) communication, all modules are not responding symptom.

Yes

For DTCs U0101, U0402, U1011 or U1013, GO to QA7 .

For DTC U0104, GO to QA12 .

For DTCs P1935, U0121, U0415, U1012 or U1039, GO to QA8 .

For DTC U0138, GO to QA13 .

If only PCM indicates fail, GO to QA3 .

For network test or all other modules indicates fail, REFER to the Workshop Manual Section 418-00, Module Communications Network, to diagnose the PCM does not respond to the scan tool or no high speed controller area network (CAN) communication, all modules are not responding symptom.

Source reference 5320

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.