Ranger 4WD V6-4.0L (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 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, 2.3L for schematic and connector information. See: Diagrams/Electrical
Diagrams/Diagrams By Number
Refer to wiring Diagram Set 25, Electronic Engine Controls, 4.0L 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. Circuits CBB39 (VT/WH) and SBB21 (GY/RD) provide voltage, and
redundant circuit GD108 (BK/VT) provides ground.
This pinpoint test is intended to diagnose the following:
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Fuse
-
Wiring, terminals or connectors
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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: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the Pinpoint
Test. See: Initial Inspection and Diagnostic Overview/Communications Network/Inspection and Verification
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
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A1 CHECK THE DLC PINS FOR DAMAGE
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Ignition OFF.
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Disconnect the scan tool cable from the Data Link Connector (DLC).
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Inspect DLC pins 6 and 14 for damage.
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Are DLC pins 6 and 14 OK?
Yes
GO to A2.
No
REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
