1485 Jacobs Rd.
Deland, FL 32724
386.738.7307
P/N 53-00606-100 Rev. D 032619
www.intellitec.com
Intellitec
SERVICE MANUAL
BATTERY CONTROL CENTER -
MINI DIESEL
TROUBLE SHOOTING - Charging Circuit
A. Auxiliary battery does not charge.
no
B. Main battery continues to drain.
C. Main battery doesn't charge from converter.
A. Auxiliary Start fails to operate.
1. The isolator relay may not be closing. Operate the engine at a high idle for at least twenty (20)
seconds and check the chassis battery voltage. The voltage must be at least 13.3 volts before
the isolator activates. Check the alternator, if the voltage is less than 13.3 volts.
Check for voltage on the coil terminal of the isolator relay. This voltage is available on J1-5. If
there is
voltage on the coil, replace the printed board. If there is voltage on the coil, check for
voltage between the main and auxiliary batteries. If the voltage is more than 0.1 volts replace the relay.
1. Isolator relay may be bad. Check for voltage on the solenoid coil lead which is available on J1-5,
when the engine is off. If there is no voltage, replace the relay.
1. The converter is not putting out at least 13.3 volts. Check converter, turn off excess 12 volt loads if
necessary.
2. Converter circuit breakers in Battery Control Center open. Reset breakers are located on lower
edge of box.
1. Fuse 17 may be blown. Check F17.
2. The Auxiliary battery may be dead. Charge battery.
3. Isolator relay may be defective. To test the relay, press the "AUX START" switch on printed
circuit board while measuring the voltage between the two batteries. (The isolator relay should
"click" indicating that it is closing.) If the voltage is more than 0.1 volt, replace the relay.
4. Switch or wires may be faulty. Check for 12 volts at J4 pin 2, while pushing switch. If there is not 12
volts, check wiring, if OK, replace the switch.
Auxiliary Start
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