Mec 3072ES - Page 94

October 2008 "3072ES / 3772ES / 3772ES HD" Service & Parts Manual
Page 4-28
FAULT: BAD 5V SENSOR SUPPLY - CHECK P2-1 WIRING! ---------------------- Flash Code: 4/5
• The “5V sensor” supply is out of range; this supply is available to power external 5V-powered sensors –
check that is has not been overloaded or short-circuited to other wiring (CE models).
SENSOR Messages CE MODELS
The following are “sensor” HELP messages – problems have been detected which are likely due to
sensor issues (CE models).
FAULT: CHECK HEIGHT1 SENSOR ----------------------------------------------------- Flash Code: 6/1
FAULT: CHECK HEIGHT2 SENSOR ----------------------------------------------------- Flash Code: 6/1
• A height sensor is giving an out-of-range voltage (below 0.5V or above 4.5V).
FAULT: CHECK HEIGHT SENSORS----------------------------------------------------- Flash Code: 6/1
• When two height sensors are fitted, both should read the same height at all times; this message indicates that
the sensors are reading different heights. Check for loose sensors and/or re-calibrate.
FAULT: CHECK PRESSURE SENSOR-------------------------------------------------- Flash Code: 6/2
•A pressure sensor is giving an out-of-range voltage (below 0.5V or above 4.5V).
FAULT: CHECK ELEVATION SWITCH -------------------------------------------------- Flash Code: 6/3
• The elevation switch is in disagreement with the height sensor(s).
•During calibration, the height at which the elevation switch opens (while lifting) and closes (while lowering), is
recorded. Subsequently, height and these calibration points are continuously checked – any significant
difference generates this error.
• This section lists “CANBUS” HELP messages – problems have been detected with Can-Bus communications
between different modules (of course, only applicable if more than one module is connected together via
CANbus):
FAULT: CAN BUS! ---------------------------------------------------------------------------- Flash Code: 6/6
• There are problems with CAN bus communications between the different modules; messages expected from
one or more module are not being received, or messages intended to one or more module cannot be
transmitted.
• Check for open- and short- circuit problems with CAN bus wiring; ensure that the CAN bus is wired correctly
pin-to-pin; ensure that the vehicle chassis is not erroneously shorted to the chassis (for example, due to
insulator breakdown in the motor).