Flex AWD V6-3.5L (2009)
REPAIR the circuit for high resistance. CLEAR the DTC. REPEAT the self-test.
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C5 CHECK THE SJB GROUND CIRCUIT
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Ignition OFF.
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Disconnect: Negative Battery Cable.
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Disconnect: SJB C2280d.
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Measure the resistance between the SJB C2280d-8, C2280d-12, circuit GD133 (BK), harness side and ground.
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Is the resistance less than 5 ohms?
Yes
CONNECT the negative battery cable. GO to C6.
No
REPAIR the circuit for high resistance. CONNECT the negative battery cable. TEST the system for normal operation.
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C6 CHECK FOR CORRECT SJB OPERATION
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Disconnect the SJB connectors.
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Check for:
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corrosion
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damaged pins
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pushed-out pins
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Connect the SJB connectors and make sure they seat correctly.
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Operate the system and verify the concern is still present.
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Is the concern still present?
Yes
INSTALL a new SJB. REFER to Smart Junction Box (SJB) See: Power and Ground Distribution/Power Distribution Module/Service and Repair. TEST
the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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Pinpoint Test D: DTC U0155
Smart Junction Box (SJB)
Pinpoint Tests
Pinpoint Test D: DTC U0155
Normal Operation
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DTC U0155 (Lost Communication with Instrument Panel Cluster (IC) Control Module) - set by the Smart Junction Box (SJB) 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:
