Mustang V8-4.6L (2009)
Information Bus: Pinpoint Tests
Pinpoint Test A: The PCM Does Not Respond To The Scan Tool
Communications Network
Pinpoint Tests
Pinpoint Test A: The PCM Does Not Respond To The Scan Tool
Refer to Wiring Diagram Set 14, Module Communications Network for schematic and connector information. See: Diagrams/Electrical
Diagrams/Diagrams By Number
Refer to Wiring Diagram Set 23, Electronic Engine Controls - 4.0L for schematic and connector information. See: Diagrams/Electrical
Diagrams/Diagrams By Number
Refer to Wiring Diagram Set 24, Electronic Engine Controls - 4.6L for schematic and connector information. See: Diagrams/Electrical
Diagrams/Diagrams By Number
Refer to Wiring Diagram Set 25, Electronic Engine Controls - 5.4L for schematic and connector information. See: Diagrams/Electrical
Diagrams/Diagrams By Number
Normal Operation
The PCM communicates with the scan tool through the High Speed Controller Area Network (HS-CAN). Circuits 1827 (WH/LG) (HS-CAN +) and
1828 (PK/LG) (HS-CAN -) provide the network connection to the PCM. The PCM shares the HS-CAN with the ABS module (if equipped), and the
Instrument Cluster (IC).
This pinpoint test is intended to diagnose the following:
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Wiring, terminals or connectors
-
PCM
PINPOINT TEST A: THE PCM DOES NOT RESPOND TO THE SCAN TOOL
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the
connector.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
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A1 VERIFY WHETHER OTHER HS-CAN MODULES PASS THE NETWORK TEST
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Enter the following diagnostic mode on the scan tool: Network Test.
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In the left hand pane of the IDS network test display screen, verify whether any HS-CAN modules passed the network test.
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Is the text "pass" or a DTC listed next to any of the following modules: ABS module, Instrument Cluster (IC) or PCM?
Yes
If "pass" or a DTC was listed next to the PCM, a network fault is not currently present. Go To Pinpoint Test J to diagnose an intermittent HS-CAN fault
condition. See: Pinpoint Test J: Intermittent No High Speed Controller Area Network (HS-CAN) Communication, Communication Can Be
Intermittently
If "pass" or a DTC was listed next to one or more modules other than the PCM, GO to A2.
No
No modules are currently communicating on the HS-CAN. Go To Pinpoint Test K to diagnose no HS-CAN communication. See: Pinpoint Test K: No
High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
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A2 COMPUTERS AND CONTROL SYSTEMS INFORMATION PINPOINT TEST QA VERIFICATION CHECK
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Verify that the Computers and Control Systems Information pinpoint test QA has been performed.
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Has pinpoint test QA been performed?