4-4 General Troubleshooting TP-5606 6/02
Will not start Weak or dead battery Recharge battery. Section 3. Battery
(cranks okay) Check electrolyte level
(continued) and specific gravity
(batteries with filler
caps only).
Perform load test,
or replace battery.
Defective air heater Check/replace air heater Engine Service Manual
Defective C1 relay Check/replace C1 relay Section 7. Engine/Generator
Components
Problem Possible Cause Corrective Action Reference
Engine Incorrect generator Check AC output Section 9. Wiring Diagrams
starts, but output voltage voltage. Section 7. Component
stops after Testing--Separate Excitation
start switch
is released
Open wiring (P1 or P2 Check continuity Section 9. Wiring Diagrams
connector)
K1 relay coil defective Check continuity Section 7. Controller
Circuit Board
Section 9. Wiring Diagrams
If LED1 is not lit, K1 Test stator Section 7. Stator
relay is not receiving Section 7. Engine/
power from stator Generator Components
B1/B2 winding
No/low oil pressure Check oil level; Section 3. Lubrication System
add oil if low Engine Service Manual
Check/repair oil pump
High water temperature Check engine cooling Engine Service Manual
system
Low oil pressure Disconnect lead from one switch and isolate
switch, high engine the lead from ground. If engine continues to run,
temperature switch replace that switch.
NOTE: Verify proper pressure or temperature
before replacing switch.
Problem Possible Cause Corrective Action Reference
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