Taurus X AWD V6-3.5L (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 25, Electronic Engine Controls - 3.5L 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 Steering Effort Control Module
(SECM), the ABS module, the Restraints Control Module (RCM), the 4X4 control module, the Accessory Protocol Interface Module (APIM) and the
Instrument Cluster (IC). Circuit CBB47 (GN/BU) provides voltage, and circuit GD113 (BK/YE) provides ground.
This pinpoint test is intended to diagnose the following:
-
Fuse
-
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: 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
-------------------------------------------------
A1 CHECK THE DATA LINK CONNECTOR (DLC) PINS FOR DAMAGE
-
Ignition OFF.
-
Disconnect the scan tool cable from the DLC.
-
Inspect DLC pins 6 and 14 for damage.
-
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.
-------------------------------------------------
A2 COMPUTERS AND CONTROL SYSTEMS INFORMATION PINPOINT TEST QA VERIFICATION
-
Verify that Computers and Control Systems Information pinpoint test QA has been carried out.