JLG 601S ANSI Service Manual - Manual (Page 113)

SECTION 3 - CHASSIS & TURNTABLE
3120746 – JLG Lift – 3-73
232 MAP Low Voltage This fault will set when the MAP reading is lower than the sensor
should normally produce. When this fault is set the Adaptive learn will
be disabled for the remainder of the key on cycle and the MIL will be
on.
234 BP High Pressure This fault sets in the event the BP value is out of the normal range.
235 BP Low Pressure This fault sets in the event the BP value is out of the normal range.
242 Crank Sync Noise The EPM must see a valid Crankshaft position signal while running. If
no signal is present for 800ms or longer, this fault will set.
243 Never Crank Synced At Start The EPM must see a valid Crankshaft Position signal while cranking
before it starts. If no signal is present within 4 cranking revs, this fault
will set.
244 Camshaft Sensor Loss The Camshaft Position Sensor is used to determine which cylinder to
fire. This fault will set if the EPM does not detect a cam pulse when the
RPM is greater than 1000. Normally the engine will run with this fault
present. In some instances this fault may cause rough engine opera-
tion.
245 Camshaft Sensor Noise This fault will set if the EPM detects erroneous pulses from the cam-
shaft position sensor causing invalid cam re-sync.
253 Knock Sensor Open This fault will set if the Knock Sensor input to the EPM is less than 0.2
volt while engine rpm is greater than 1500 and MAP is greater than 8
psia.
254 Excessive Knock Signal This fault will set if the Knock Sensor input to the EPM is greater than
4.5 volts while MAP is less than 8 psia and knock spark retard is at
maximum.
311 Injector Driver #1 Open (2.5L) This fault will set if the EPM detects low feedback voltage on the inter-
nal injector while the injector drive circuit is in the off-state and battery
voltage is greater than 9 volts.
312 Injector Driver #1 Shorted (2.5L) This fault will set if the EPM detects 10 injector firings with the internal
driver sense voltage greater than 4 volts while the injector is in the on-
state and battery voltage is less than 16 volts.
313 Injector Driver #2 Open (2.5L) This fault will set if the EPM detects low feedback voltage on the inter-
nal injector while the injector drive circuit is in the off- state and bat-
tery voltage is greater than 9 volts.
314 Injector Driver #2 Shorted (2.5L) This fault will set if the EPM detects 10 injector firings with the internal
driver sense voltage greater than 4 volts while the injector is in the on-
state and battery voltage is less than 16 volts.
315 Injector Driver #3 Open (2.5L) This fault will set if the EPM detects low feedback voltage on the inter-
nal injector while the injector drive circuit is in the off-state and battery
voltage is greater than 9 volts.
316 Injector Driver #3 Shorted (2.5L) This fault will set if the EPM detects low feedback voltage on the inter-
nal injector while the injector drive circuit is in the off-state and battery
voltage is greater than 9 volts.
Table 3-10. EPM Diagnostic Trouble Codes
Diagnostic
Trouble
Code
Description Cause for Setting DTC