JLG 740AJ Service Manual - Manual (Page 144)

SECTION 3 - CHASSIS & TURNTABLE
3-92 – JLG Lift – 3121160
Table 3-10. ECM Diagnostic Trouble Codes
Diagnostic
Trouble
Code
Description
11 All Systems OK
12 Throttle Position (TP) Sensor Low Voltage
14 Manifold Absolute Pressure (MAP) Low Voltage
21 Overspeed
22 Throttle Position (TP) Sensor High Voltage
24 Manifold Absolute Pressure (MAP) High Voltage
31 Fuel Pump Low Voltage
32 Heated Oxygen Sensor (HO2S) Low Voltage
33 Engine Coolant Temperature (ECT) Sensor High Voltage
35 Intake Air Temperature (IAT) Sensor High Voltage
41 Fuel Pump High Voltage
42 Heated Oxygen Sensor (HO2S) High Voltage
43 Engine Coolant Temperature (ECT) Sensor Low Voltage
45 Intake Air Temperature (IAT) Sensor Low Voltage
51 Low Oil Pressure
52 Crankshaft Position (CKP) Sensor Extra/Missing Pulses
53 Camshaft Position Sensor (CMP) Sensor Illegal Pattern
54 Engine Control Module (ECM) Fault Illegal Operation
55 Engine Control Module (ECM) Fault Illegal Interruption
56 Engine Control Module (ECM) Fault COP (Computer Operating Properly) Failure
61 System Voltage Low
62 System Voltage High