JLG 740A, Service And Maintenance Manual

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SECTION 3 - CHASSIS & TURNTABLE
3121160 – JLG Lift – 3-93
Table 3-11. EPM Diagnostic Trouble Codes
Diagnostic
Trouble
Code
Description Cause for Setting DTC
111 Closed Loop Multiplier High (LPG)
This fault sets if the Closed Loop multiplier exceeds the limits of nor-
mal operation and cannot correctly modify the fuel flow within its lim-
its.
112
HO2S Open/Inactive (Bank 1) This fault will set if HO2S 1 is cold, non-responsive, or inactive for 60
seconds or longer.
113
HO2S Open/Inactive (Bank 2) This fault will set if HO2S 2 is cold, non-responsive, or inactive for 60
seconds or longer.
121
Closed Loop Multiplier High Bank 1 (Gasoline) This fault sets if the Closed Loop multiplier exceeds the limits of nor-
mal operation. When the multiplier cannot correctly modify the fuel
flow within its limits, the limit is enforced.
NOTE: If this DTC is set in conjunction with DTC 132, the HO2S sen-
sors may be cross connected.
122
Closed Loop Multiplier Low Bank 1 (Gasoline) This fault sets if the Closed Loop multiplier exceeds the limits of nor-
mal operation. When the multiplier cannot correctly modify the fuel
flow within its limits, it is limited at -35%.
NOTE: If this DTC is set in conjunction with DTC 131, the HO2S sen-
sors may be cross connected.
124
Closed Loop Multiplier Low (LPG) This fault sets if the Closed Loop multiplier exceeds the limits of nor-
mal operation. When the multiplier cannot correctly modify the fuel
flow within its limits, it is limited at -35%. When this condition occurs,
the EPM perceives the engine to be running rich.
125
Closed Loop Multiplier High (Natural Gas) This fault sets if the Closed Loop multiplier exceeds the limits of nor-
mal operation. When the multiplier cannot correctly modify the fuel
flow within its limits, it is limited at 35%. When this fault occurs, it is
because the EPM perceives the engine to be running lean.
126
Closed Loop Multiplier Low (Natural Gas) This fault sets if the Closed Loop multiplier exceeds the limits of nor-
mal operation. When the multiplier cannot correctly modify the fuel
flow within its limits, it is limited at -35%. This occurs when the module
perceives the engine to be running rich.
131
Closed Loop Multiplier High Bank 2 (Gasoline) This fault sets if the Closed Loop multiplier exceeds the limits of nor-
mal operation. When the multiplier cannot correctly modify the fuel
flow within its limits, the limit is enforced.
132
Closed Loop Multiplier Low Bank 2 (Gasoline) This fault sets if the Closed Loop multiplier exceeds the limits of nor-
mal operation. When the multiplier cannot correctly modify the fuel
flow within its limits, it is limited at -35%.
141
Adaptive Lean Fault (High Limit- Gasoline) This fault sets if the Adaptive multiplier exceeds the limits of normal
operation.
142
Adaptive Rich Fault (Low Limit Gasoline) This fault sets if the Adaptive multiplier exceeds the limits of normal
operation.
143
Adaptive Learn High (LPG) This fault will set if the adaptive multiplier exceeds the limits of normal
operation.
144
Adaptive Learn Low (LPG) This fault will set if the adaptive multiplier exceeds the limits of normal
operation.