LAUNCH TECH CRP 429HD - Dtcs for J1587;J1708 and J1939

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LAUNCH CRP 429HD User's Manual
EN
provide additional information on where the DTC originated and the operating
conditions that caused it to set. Here below is an example to illustrate the
structure of the digits:
2.3.2 DTCs for J1587/J1708 and J1939
This section explains the basic elements of fault codes for J1587/J1708 and
J1939 data bus protocols, how to view these codes on CRP 429HD HD, and
what they mean. Each fault code on CRP 429HD HD contain three distinct
pieces of information, as described below.
J1587/J1708 fault codes consist of the following, in this order:
• SubsystemIdentier(SID)–IndicateswhatfunctionontheECUhasfailed.
• FailureModeIndicator(FMI)–Indicatesinwhatwaythefunctionfailed.
• Occurence(OC)–Indicatestheoccurencetimesoffaultcodes.
J1939 fault codes consist of the following, in this order:
• SuspectParameterNumber(SPN)–IndicateswhatfunctionontheECUhas
failed.