F 150 4WD V8-4.6L VIN 8 (2010)
INSTALL a new DSM. REFER to Driver Seat Module (DSM) See: Mirrors/Memory Positioning Systems/Memory Positioning Module/Service and
Repair.
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Pinpoint Test E: DTC U0155
Driver Seat Module (DSM)
Pinpoint Tests
Pinpoint Test E: DTC U0155
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 123, Memory Seats for schematic and connector information. See: Diagrams/Electrical Diagrams/Diagrams By Number
Normal Operation
The Driver Seat Module (DSM) and the Instrument Cluster (IC) communicate using the Medium Speed Controller Area Network (MS-CAN). Messages
are exchanged between the modules on the MS-CAN for the purposes of determining what functions are being carried out.
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DTC U0155 (Lost Communication With Instrument Panel Cluster (IC) Control Module) - set by the Driver Seat Module (DSM) whenever it has
the ignition status message present and the DSM has lost communication to the IC for 15 seconds or longer and the DSM voltage is between 10
and 15 volts.
This pinpoint test is intended to diagnose the following:
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Module communication
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DSM
-
IC
PINPOINT TEST E: DTC U0155
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E1 VERIFY CUSTOMER CONCERN
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Ignition ON.
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Verify that there is an observable symptom present.
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Is an observable symptom present?
Yes
GO to E2.
No
The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.
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E2 CHECK THE COMMUNICATION NETWORK
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Ignition ON.
-
Enter the following diagnostic mode on the scan tool: Network Test .
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Carry out the network test.
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Does the IC pass the network test?