Troubleshooting - Textron JACOBSEN Eclipse 2 Technical/Repair Manual

ELECTRICAL

Troubleshooting

Symptom: Machine will not power up.
Probable Cause
Faulty battery pack.
Faulty battery pack fuse.
Faulty generator.
Faulty engine on/off switch
Faulty 30A fuse.
Faulty power circuit.
Open ground circuit.
Faulty key switch.
Faulty key switch power circuit.
Faulty switch signal circuit.
4
Faulty main control unit.
Faulty main control unit power circuit.
Open main control unit ground circuit.
Symptom: Traction motor will not engage.
Probable Cause
Faulty traction motor connections.
Faulty bail potentiometer.
Faulty bail potentiometer power circuit.
Open bail potentiometer ground circuit.
Faulty bail potentiometer input circuit.
Faulty throttle potentiometer.
Faulty throttle potentiometer power circuit.
Open throttle potentiometer ground circuit.
Faulty throttle potentiometer input circuit.
Faulty traction motor.
Faulty traction motor controller.
Faulty main control unit.
4-34
Test battery pack. (See "Battery Pack Test" on page 4-45.)
Test fuse. (See "Battery Pack Fuse Test" on page 4-50.)
Test generator. (See "Gen-Set Output Test" on page 4-46.)
Test engine on/off Switch. (See "Engine On/Off Switch" on page 4-47.)
Test 30A fuse. (See "30A Fuse Test" on page 4-50.)
Measure voltage between battery pack positive terminal and ground. Measure voltage
between main control unit connector J1-3 and ground. Voltage must be approximately
48 VDC.
Measure continuity between battery pack negative terminal and main control unit
connectors J2-26 and J2-33. Continuity must be indicated.
Test key switch. (See "Key Switch Test" on page 4-48.)
Measure voltage between key switch terminal B and ground. Voltage must be
approximately 48 VDC.
With key switch in start position, measure voltage between key switch terminal A and
ground. With key switch in the start position, measure voltage between main control
unit connector J2-24 and ground. Voltage must be approximately 48 VDC.
Substitute main control unit with a known good main control unit.
Measure voltage between main control unit connector J1-3 and ground. Voltage must be
approximately 48 VDC.
Measure continuity between battery pack negative terminal and main control unit
connectors J2-26 and J2-33. Continuity must be indicated.
Check connections (moisture, loose or corroded pins, etc.) and repair as necessary.
Test bail potentiometer. (See "Bail Potentiometer Test" on page 4-55.)
Measure voltage between main control unit connector J2-31 and ground. Measure
voltage between bail potentiometer terminal 1 and ground. Voltage must be
approximately 5 VDC.
Measure continuity between main control unit connector J2-30 and bail potentiometer
terminal 1. Continuity must be indicated.
Measure voltage between main control unit connector J2-32 and ground. Measure
voltage between bail potentiometer terminal 2 and ground. Voltage must range
between 0 and 5 VDC.
Test throttle potentiometer. (See "Throttle Potentiometer Test" on page 4-54.)
Measure voltage between main control unit connector J2-15 and ground. Measure
voltage between throttle potentiometer terminal 3 and ground. Voltage must be
approximately 5 VDC.
Measure continuity between main control unit connector J2-29 and throttle potentiometer
terminal 1. Continuity must be indicated.
Measure voltage between main control unit connector J2-16 and ground. Measure
voltage between throttle potentiometer terminal 2 and ground. Voltage must range
between 0 and 5 VDC.
Test traction motor. (See "Traction Motor Test" on page 4-52.)
Substitute traction motor controller with a known good controller.
Substitute main control unit with a known good controller.
Remedy
Remedy
4262930-Rev A