SECTION 3 - CHASSIS & TURNTABLE
3-70
– JLG Lift –
3120895
ENGINE COOLANT TEMPERATURE (ECT)
SENSOR
The engine coolant temperature (ECT) sensor is a
g
thermistor (a resistor which changes value based on tem-
perature) mounted in the engine coolant stream. Low cool-
ant temperature produces a high resistance of 100,000
ohms at -40°C (-40°F). High temperature causes a low
resistance of 70 ohms at 130°C (266°F). The ECM sup-
plies a 5-volt signal to the ECT sensor through resistors in
the ECM and measures the voltage. The signal voltage will
be high when the engine is cold and low when the engine
is hot. By measuring the voltage, the ECM calculates the
engine coolant temperature. Engine coolant temperature
affects most of the systems that the ECM controls.
After engine start-up, the temperature should rise steadily
to about 85°C (185°F). it then stabilizes when the thermo-
stat opens. If the engine has not been run for several
hours (overnight), the engine coolant temperature and
intake air temperature displays should be close to each
Table 3-9. 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
Содержание JLG 400S
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Страница 100: ...SECTION 3 CHASSIS TURNTABLE 3 48 JLG Lift 3120895 Figure 3 35 Swing Drive Installation...
Страница 101: ...SECTION 3 CHASSIS TURNTABLE 3120895 JLG Lift 3 49 Figure 3 36 Swing Motor...
Страница 105: ...SECTION 3 CHASSIS TURNTABLE 3120895 JLG Lift 3 53 Figure 3 38 Swing Brake S N 64802 to Present...
Страница 107: ...SECTION 3 CHASSIS TURNTABLE 3120895 JLG Lift 3 55 Figure 3 39 Swing Torque Hub...
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Страница 137: ...SECTION 3 CHASSIS TURNTABLE 3120895 JLG Lift 3 85 Figure 3 50 Hyd Tank Installation...
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Страница 149: ...SECTION 3 CHASSIS TURNTABLE 3120895 JLG Lift 3 97 Figure 3 54 Deutz EMR 2 Troubleshooting Flow Chart...
Страница 150: ...SECTION 3 CHASSIS TURNTABLE 3 98 JLG Lift 3120895 Figure 3 55 Deutz EMR 2 Vehicle Side Connection Diagram...
Страница 151: ...SECTION 3 CHASSIS TURNTABLE 3120895 JLG Lift 3 99 Figure 3 56 Deutz EMR 2 Engine Side Connection Diagram Sheet 1 of 2...
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Страница 153: ...SECTION 3 CHASSIS TURNTABLE 3120895 JLG Lift 3 101 Figure 3 58 EMR 2 Engine Plug Pin Identification...
Страница 154: ...SECTION 3 CHASSIS TURNTABLE 3 102 JLG Lift 3120895 Figure 3 59 EMR 2 Vehicle Plug Pin Identification...
Страница 155: ...SECTION 3 CHASSIS TURNTABLE 3120895 JLG Lift 3 103 Figure 3 60 EMR2 Fault Codes Sheet 1 of 5...
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Страница 288: ...SECTION 4 BOOM PLATFORM 4 24 JLG Lift 3120895 Figure 4 12 Rotator Counterbalance Valve...
Страница 303: ...SECTION 5 HYDRAULICS 3120895 JLG Lift 5 15 Figure 5 22 Main Valve...
Страница 313: ...SECTION 5 HYDRAULICS 3120895 JLG Lift 5 25 Figure 5 25 Variable Displacement Hydraulic Pump...
Страница 318: ...SECTION 6 JLG CONTROL SYSTEM S N 61718 TO PRESENT 6 2 JLG Lift 3120895 Figure 6 2 ADE Block Diagram...
Страница 322: ...SECTION 6 JLG CONTROL SYSTEM S N 61718 TO PRESENT 6 6 JLG Lift 3120895 Figure 6 4 Control Module Location...
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Страница 413: ...SECTION 7 BASIC ELECTRICAL INFORMATION SCHEMATICS 3120895 JLG Lift 7 11 Figure 7 13 Connector Installation...
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