SECTION 3 - CHASSIS & TURNTABLE
3121262
– JLG Lift –
3-175
DTC 642- 5 Volt External Low Voltage
• Engine Control Module
• Check Condition- Key on
• Fault Condition- ECM 5-volt output is below the acceptable
limit
• Corrective Action(s)- Illuminate MIL and/or sound audible
warning or illuminate secondary warning lamp
• Non-emissions related fault
The ECM supplies 5-volt power to sensors, switches, and actu-
ators external to the ECM. By supplying the power to these
devices, the ECM can accurately measure their output relative
to its own ground reference. The ECM can also control when
the devices are active and put the devices in a low or no power
state based on the current operating condition of the engine
or vehicle.
If this fault sets, something other than the ECM is drawing the
5-volt power output of the ECM below an acceptable thresh-
old. This may be due to a short in the wire harness, malfunc-
tioning device, or failure of the ECM power output circuitry.
Diagnostic Aids
• Measure the 5-volt output of the ECM while cycling the key
on and the engine stopped. Verify that the output is lower
than the fault thresholds configured in the diagnostic cali-
bration.
• Inspect the 5-Volt output circuit in the wire harness and
look for shorts to ground or other harness circuits.
• Disconnect each device powered by the 5-volt output of
the ECM one-at-a-time. Powered devices may include the
throttle actuator, smart sensors, smart actuators, etc. After
disconnecting device, observe the system fault and deter-
mine if the fault has cleared. If the fault clears, troubleshoot
the disconnected device for failures.
• With all 5-volt powered devices disconnected, look for a
change in the fault state and measure the 5-volt output of
the ECM and verify it is within acceptable limits.
PINK/WHITE
4
3
5
1
2
TAN/ORANGE
GREEN/RED
PURPLE/BLUE
BLACK/GREEN
Содержание JLG 1500SJ
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Страница 40: ...SECTION 1 SPECIFICATIONS 1 16 JLG Lift 3121262 NOTES...
Страница 56: ...SECTION 3 CHASSIS TURNTABLE 3 6 JLG Lift 3121262 Figure 3 5 Chassis Component Location Sheet 1 of 2...
Страница 58: ...SECTION 3 CHASSIS TURNTABLE 3 8 JLG Lift 3121262 Figure 3 7 Turntable Component Location Sheet 1 of 2...
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Страница 92: ...SECTION 3 CHASSIS TURNTABLE 3 42 JLG Lift 3121262 Figure 3 18 Drive Hub Special Tools Sheet 1 of 4...
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Страница 95: ...SECTION 3 CHASSIS TURNTABLE 3121262 JLG Lift 3 45 Figure 3 21 Drive Hub Special Tools Sheet 4 of 4...
Страница 102: ...SECTION 3 CHASSIS TURNTABLE 3 52 JLG Lift 3121262 Figure 3 32 Reggiana Riduttori Hub Sheet 1 of 2...
Страница 147: ...SECTION 3 CHASSIS TURNTABLE 3121262 JLG Lift 3 97 Figure 3 53 Swing Bearing Tolerance Boom Placement Sheet 1 of 2...
Страница 148: ...SECTION 3 CHASSIS TURNTABLE 3 98 JLG Lift 3121262 Figure 3 54 Swing Bearing Tolerance Boom Placement Sheet 2 of 2...
Страница 151: ...SECTION 3 CHASSIS TURNTABLE 3121262 JLG Lift 3 101 Figure 3 56 Swing Bearing Removal Sheet 1 of 4...
Страница 181: ...SECTION 3 CHASSIS TURNTABLE 3121262 JLG Lift 3 131 Figure 3 67 Deutz EMR 2 Vehicle Side Connection Diagram...
Страница 182: ...SECTION 3 CHASSIS TURNTABLE 3 132 JLG Lift 3121262 Figure 3 68 Deutz EMR 2 Engine Side Connection Diagram Sheet 1 of 2...
Страница 183: ...SECTION 3 CHASSIS TURNTABLE 3121262 JLG Lift 3 133 Figure 3 69 Deutz EMR 2 Engine Side Connection Diagram Sheet 2 of 2...
Страница 184: ...SECTION 3 CHASSIS TURNTABLE 3 134 JLG Lift 3121262 Figure 3 70 EMR 2 Engine Plug Pin Identification...
Страница 185: ...SECTION 3 CHASSIS TURNTABLE 3121262 JLG Lift 3 135 Figure 3 71 EMR 2 Vehicle Plug Pin Identification...
Страница 186: ...SECTION 3 CHASSIS TURNTABLE 3 136 JLG Lift 3121262 Figure 3 72 EMR2 Fault Codes Sheet 1 of 5...
Страница 187: ...SECTION 3 CHASSIS TURNTABLE 3121262 JLG Lift 3 137 Figure 3 73 EMR2 Fault Codes Sheet 2 of 5...
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Страница 273: ...SECTION 4 BOOM PLATFORM 3121262 JLG Lift 4 25 Figure 4 6 Boom Assembly Sheet 7 of 7...
Страница 299: ...SECTION 4 BOOM PLATFORM 3121262 JLG Lift 4 51 Figure 4 12 Load Pin Removal Tool JLG P N 4846765...
Страница 305: ...SECTION 4 BOOM PLATFORM 3121262 JLG Lift 4 57 Figure 4 14 Jib Assembly Sheet 2 of 3...
Страница 318: ...SECTION 4 BOOM PLATFORM 4 70 JLG Lift 3121262 Figure 4 18 Powertrack Hosing Sheet 2 of 3...
Страница 319: ...SECTION 4 BOOM PLATFORM 3121262 JLG Lift 4 71 Figure 4 19 Powertrack Hosing Sheet 3 of 3...
Страница 332: ...SECTION 4 BOOM PLATFORM 4 84 JLG Lift 3121262 Figure 4 22 Outer Mid Boom Extend Retract Cables...
Страница 333: ...SECTION 4 BOOM PLATFORM 3121262 JLG Lift 4 85 Figure 4 23 Fly Boom Extend Retract Cables...
Страница 350: ...SECTION 4 BOOM PLATFORM 4 102 JLG Lift 3121262 Figure 4 29 Rotator Counterbalance Valve...
Страница 505: ...SECTION 5 BASIC HYDRAULIC INFORMATION HYDRAULIC SCHEMATICS 3121262 JLG Lift 5 151 Thispageleftblankintentionally...
Страница 516: ...SECTION 5 BASIC HYDRAULIC INFORMATION HYDRAULIC SCHEMATICS 5 162 JLG Lift 3121262 NOTES...
Страница 536: ...SECTION 6 JLG CONTROL SYSTEM 6 20 JLG Lift 3121262 Figure 6 2 Control System Block Diagram...
Страница 545: ...SECTION 6 JLG CONTROL SYSTEM 3121262 JLG Lift 6 29 Figure 6 10 Control Module Location...
Страница 561: ...SECTION 6 JLG CONTROL SYSTEM 3121262 JLG Lift 6 45 Figure 6 19 System Test Flow Chart Platform Tests...
Страница 563: ...SECTION 6 JLG CONTROL SYSTEM 3121262 JLG Lift 6 47 Figure 6 20 System Test Flow Chart Ground Station Tests...
Страница 654: ...SECTION 7 BASIC ELECTRICAL INFORMATION ELECTRICAL SCHEMATICS 7 10 JLG Lift 3121262 Figure 7 13 Connector Installation...
Страница 657: ...SECTION 7 BASIC ELECTRICAL INFORMATION ELECTRICAL SCHEMATICS 3121262 JLG Lift 7 13 Figure 7 20 Jib Electrical Components...
Страница 678: ...SECTION 7 BASIC ELECTRICAL INFORMATION ELECTRICAL SCHEMATICS 7 34 JLG Lift 3121262 Figure 7 41 Pump Harness...
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