Operation - Section 3 02/99 OM3013 Page 3-20 Operating Instructions Engine Maintenance Light (Protect Engine (9, Figure 3-2) "Warning" faults (light ON) are ones that require attention in the near future, but in most conditions will not greatly affect performance. "Severe" faults (light FLASHING) are ones that require immediate attention, because the engine could be significantly affected. Active fault conditions MUST be corrected as soon as possible. Engine Shutdown Light (Stop Engine) (7, Figure 3-2) When illu- minated, this red engine shut- down light indi- cates a serious engine problem exists. permit determination of the kind of "fault(s)* detected. The "fault" can be engine disabling.
Stop the truck in a safe area, as soon as possible. Shutdown the engine and notify Maintenance personnel immedi- ately Engine Maintenance Light (Check Engine) (8, Figure 3-2) Fault Scroll Switch (12, Figure 3-2) This Fault Scroll switch may be used to scroll through the recorded faults held in memory. It will display only active fault codes. This amber/yellow light, when illu- minated, indicates an engine "fault" exists. Current engine operation may proceed, but the machine should be scheduled for checkout/repair as soon as practi- cal.
To display the next active fault code, move the switch lever to the "up" position momentarily and release (switch is spring-loaded to the center "OFF" position). Activating the switch again will advance to the next fault code, etc. Once all active fault codes have been displayed, the fault code display sequence will be repeated, starting from the first fault code.
Moving the switch lever to the "down" position momentarily and releasing, permits the system to scroll (as described above) backwards through the fault "list." This blue engine maintenance light, when illuminated, indicates an "out-of-range" condition exists within the fuel temperature, cool- ant, oil, or intake air system(s) of the engine. The light may show initially as a constant "On", but will go to "flashing On", if the con- dition is allowed to get worse. Serious engine dam- age will occur if operation is continued without correcting the "fault". PMC Display (Optional) (10, Figure 3-2) This area may be used for optional Powertrain Manage- ment Controller Display.
Refer to the 330M Shop Manual for further details. Fault Check Switch (11, Figure 3-2) This Fault Check switch, when moved to the "ON" (down) position, may be used to activate the engine electronic control system diagnos- tic codes. When the system detects a "fault" and one of the indicator lamps (7, 8, 9) illuminates as previ- ously described, this switch will