Flex AWD V6-3.5L (2009)
Driver Seat Module (DSM)
Pinpoint Tests
Pinpoint Test I: DTC U0155
Normal Operation
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DTC U0155 (Lost Communication with Instrument Panel Cluster (IC) Control Module) - set by the Driver Seat Module (DSM) if IGN status
message is present, and if messages are missing for 15 seconds or longer from the Instrument Cluster (IC) over the Medium Speed Controller Area
Network (MS-CAN).
This pinpoint test is intended to diagnose the following:
-
Module communication
-
DSM
PINPOINT TEST I: DTC U0155
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I1 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 I2.
No
The system is operating normally at this time. The DTC may have been set due to high network traffic or intermittent fault condition.
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I2 CHECK THE COMMUNICATION NETWORK
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Enter the following diagnostic mode on the scan tool: Network Test.
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Carry out the network test.
-
Does the DSM pass the network test?
Yes
GO to I3.
No
REFER to Information Bus.
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I3 RETRIEVE THE RECORDED DTCs FROM THE SELF-TEST
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Check for recorded DSM DTCs from the self-test.
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Is DTC B1317 or B1318 recorded?
Yes
For DTC B1317, Go To Pinpoint Test f. See: Driver Seat Module (DSM)/Pinpoint Test F: DTC B1317
For DTC B1318, Go To Pinpoint Test g. See: Driver Seat Module (DSM)/Pinpoint Test G: DTC B1318
No
GO to I4.
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