JLG 600SC_660SJC Service Manual - Manual (Page 172)

SECTION 6 - TURNTABLE
6-26 – JLG Lift – 3121157
6.7 CAT DGC DIAGNOSTIC SUPPORT AND
TROUBLE CODE DEFINITIONS
This section defines the diagnostics and recommended
troubleshooting procedures associated with the engine
control module (ECM) on the CAT 3.4 engine.
This section is organized in the following manner:
1st page of Diagnostic Information for a Given Fault (See
Figure 6-23.) then:
2nd Page of Diagnostic Information for a Given Fault (See
Figure 6-24.)
DTC XXXX- Diagnostic Condition
Block Diagram of Circuit
External Hardware Input/Output- This identifies the hardware that either sends an input
to the ECM or is driven by and ECM output.
Check Condition- This defines what condition to troubleshoot the fault condition.
Fault Condition(s)- This identifies the condition(s) that set the fault.
Corrective Action(s)- This identifies the RECOMMENED corrective action(s) that the
ECM is generally programmed to perform. In some instances, the calibration
engineer(s) may choose to perform a different action.
Emissions or Non-emissions related fault
Text to identify the circuit of interest and its use for control.
Text to describe t he conditions that cause the fault to set.
Figure 6-23. 1st page of Diagnostic Information for a Given Fault