Group 38 Fault Codes, Instrument Cluster
Troubleshooting
MID 140 PSID 200 J1939 Data Link Interruption, Engine ECU
General information
The control units share important messages via the SAE
J1939 Control data link. If one control unit is missing in-
formation from another control unit, this fault code is
used to indicate which control unit is expected to trans-
mit the message via the J1939 data link.
Fault code
FMI 9
Abnormal update rate.
Conditions for fault code:
•
If the instrument cluster does not receive the mes-
sage from the engine control unit via the J1939
control data link within a specific time period, the in-
strument cluster interprets this as a communication
fault from the engine control unit and a fault code is
stored.
Possible cause:
•
Fault in the J1939 data link between the instrument
cluster and the engine control unit.
Reaction from the instrument cluster:
•
Fault code is stored.
•
Noticeable external symptoms:
•
•
Warning light lights up.
Appropriate check:
•
Fault-trace the J1939 data link, see service informa-
tion group 371 ”Data links, fault-tracing”.
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