Focus L4-2.0L (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 Diagrams Set 14, Module Communications Network for schematic and connector information. See: Diagrams/Electrical
Diagrams/Diagrams By Number
Refer to Wiring Diagrams Set 23, Electronic Engine Controls 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 VDB04 (WH/BU) (HS-CAN +) and
VDB05 (WH) (HS-CAN -) provide the network connection to the PCM. The PCM shares the HS-CAN with the ABS module (if equipped), the
Restraints Control Module (RCM), the Occupant Classification System Module (OCSM), the Accessory Protocol Interface Module (APIM) and the
Instrument Cluster (IC).
This pinpoint test is intended to diagnose the following:
-
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 (if equipped): ABS module, Accessory Protocol Interface Module
(APIM), Instrument Cluster (IC), Occupant Classification System Module (OCSM), PCM or Restraints Control Module (RCM)?
Yes
If "pass" or a DTC was listed next to the PCM, a network fault is not currently present. Go To Pinpoint Test N to diagnose an intermittent HS-CAN fault
condition. See: Pinpoint Test N: Intermittent No High Speed Controller Area Network (HS-CAN) Communication, One Or More Modules Are Not
Respond
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 O to diagnose no HS-CAN communication. See: Pinpoint Test O: No
High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
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A2 COMPUTER 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 carried out.
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Has pinpoint test QA been carried out?
Yes