Engine Maintenance
62
Troubleshooting the Fuel Solenoid
System
NOTE: The fuel solenoid pull-in coil will
require 35 to 45 amps to turn on the fuel. The
unit’s battery must be in good condition. If the
battery has enough power to crank the engine
over, it has enough power to energize the fuel
solenoid pull-in coil.
If you suspect that the engine does not run
because the fuel solenoid is not operating
correctly, use the following procedure:
1. Disconnect the fuel solenoid wire connector
from the main wire harness.
2. Use the microprocessor keypad to enter the
Relay Board Test Mode. Refer to the
appropriate Microprocessor Operation and
Diagnosis Manual for detailed information
about the Relay Board Test Mode.
3. Energize the fuel solenoid circuits by
energizing the run relay [RUNR] with the
Relay Board Test Mode.
4. Check the voltage on the 8D circuit (pin A) in
the main wire harness connector for the fuel
solenoid. Refer to the following illustrations
to identify the pins in the wire connectors.
a. If battery voltage is not present on the 8D
circuit, check the 8D circuit and the
related circuits and components for a fault.
b. If battery voltage is present on the 8D
circuit, go to step 5.
Figure 35: Main Wire Harness
Connector Pin Identification
5. Check the CH circuit (pin C) in the main wire
harness connector for continuity to a good
chassis ground.
a. If there is no continuity between the CH
circuit and a good chassis ground, check
the CH wire for an open circuit.
b. If there is continuity between the CH
circuit in the main wire harness at the fuel
solenoid wire connector and a good
chassis ground, go to step 6.
6. Place a jumper wire between the black wire
(CH—pin C) in the fuel solenoid connector
and a good chassis ground.
1.
Fuel Solenoid Relay Contacts
2.
Fuel Solenoid Pull-In Coil
3.
Fuel Solenoid Hold-In Coil
4.
Fuel Solenoid Timer
5.
Fuel Solenoid Relay Coil
Figure 34: Simplified Schematic Diagram
of Fuel Solenoid System
1
2
3
4
5
AGA310
1.
Red (8D)
2.
White (8DP)
3.
Black (CH)
Figure 36: Fuel Solenoid
Connector Pin Identification
AEA704
AEA633
Summary of Contents for Spectrum DE 30-2
Page 4: ...4...
Page 12: ...Safety Precautions 12...
Page 16: ...Specifications 16...
Page 31: ...Unit Description 31 1 Access Panels 2 Defrost Dampers Figure 12 Back View of Unit 1 2 AGA215...
Page 42: ...Operating Instructions 42...
Page 48: ...Electrical Maintenance 48...
Page 106: ...Structural Maintenance 106...
Page 110: ...Mechanical Diagnosis 110...
Page 114: ...Remote Evaporator Specifications 114...
Page 116: ...Remote Evaporator Maintenance Inspection Schedule 116...
Page 122: ...Remote Evaporator Electrical Maintenance 122...
Page 126: ...Remote Evaporator Refrigeration Service Operations 126...
Page 128: ...Remote Evaporator Structural Maintenance 128...
Page 130: ...Remote Evaporator System Diagnosis 130...
Page 134: ...Wiring and Schematic Diagrams Index 134...
Page 135: ...135 Schematic Diagram Page 1 of 2...
Page 136: ...136 Schematic Diagram Page 2 of 2...
Page 137: ...137 Wiring Diagram Page 1 of 4...
Page 138: ...138 Wiring Diagram Page 2 of 4...
Page 139: ...139 Wiring Diagram Page 3 of 4...
Page 140: ...140 Wiring Diagram Page 4 of 4...