Service Manual Manual

SECTION 3 - CHASSIS & TURNTABLE
3-134 – JLG Lift – 3121142
3.29 CAT DGC DIAGNOSTIC SUPPORT AND TROUBLE
CODE DEFINITIONS
This section defines the diagnostics and recommended trou-
bleshooting 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 Fig-
ure 3-80.) then:
2nd Page of Diagnostic Information for a Given Fault (See Fig-
ure 3-81.)
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 the conditions that cause the fault to set.
Figure 3-80. 1st page of Diagnostic Information for a Given Fault