Specifications

5
Fault Code / Troubleshooting
12
4. Check for debris in heat exchanger and coolant pump.
i. Listen to see if coolant pump is operating. If pump is not operating and the existing fault is for overheat, the likely issue is a plugged coolant pump.
1. Remove the magnet from pump (found on page 17) and clean. If magnet is plugged the coolant system must be ushed because it is contaminated.
Failure to do this will cause another plugged magnet and could lead to premature engine damage or failure.
5. Inspect the temperature and overheat sensors for corrosion at the terminal.
i. If corrosion is found, validate the cause. If there is coolant found in the connection replace the sensors.
6. If electrical connections are found good check sensors using the resistance chart found on page 19.
015 - OVERHEAT WITH EXCESSIVE TEMPERATURES
1. Sensor has detected excessive temperatures repeatedly.
a. This code indicates the heater has overheated 3 consecutive times.
2. Unlock control unit:
a. Document all codes.
b. Clear codes.
3. Follow procedures outlined for Code 12 and 14.
4. Run unit to ensure the issue is resolved.
017 - OVERHEAT WITH EXCESSIVE TEMPERATURE
1. This code is set when excess temperature (above 130 C) is seen at the overheat sensor
2. See code 015
020 - OPEN CIRCUIT - GLOW PIN (BE CAREFUL NOT TO PULL WIRES OFF GLOW PIN DURING REMOVAL)
1. Inspect glow pin leads for continuity, replace if necessary
2. Check for corrosion in terminals (maintenance)
021 - SHORT CIRCUIT - GLOW PIN (BE CAREFUL NOT TO PULL WIRES OFF GLOW PIN DURING REMOVAL)
1. Inspect glow pin leads for continuity, replace if necessary
2. Check for corrosion in terminals (maintenance)
030 - COMBUSTION AIR FAN (A FAN WITH RUB MARKS IS A NON-WARRANTY FAILURE)
1. Blower fan may be jammed, frozen or plugged
i. Clean if possible and retry fan
2. Replace as necessary
031 - BLOWER MOTOR INTERRUPTED
1. Inspect electrical connections for corrosion (maintenance)
2. Replace fan as necessary
032 - BLOWER MOTOR SHORT CIRCUIT
1. Inspect electrical connections for corrosion (maintenance)
2. Replace fan as necessary
041 - COOLANT PUMP OPEN CIRCUIT - NOTE: A DAMAGED/BROKEN COOLANT PUMP IS NOT WARRANTY
1. Inspect electrical connections for continuity and corrosion (maintenance)
2. Replace as necessary
042 - COOLANT PUMP SHORT - CIRCUIT
1. Inspect electrical connections for continuity and corrosion (maintenance)
2. Replace as necessary.
047 - SHORT CIRCUIT OR OVERLOAD - FUEL METERING PUMP (FMP)
1. Fuel pump positive wire (green w/red) is shorted to chassis ground
2. Unplug the fuel pump and power up unit
3. If fault Code 48 is displayed the fuel pump is defective
4. If fault Code 48 is not displayed recheck wiring
048 - OPEN CIRCUIT - FUEL METERING PUMP (FMP)
Disconnect connector from fuel pump and measure resistance value of fuel pump see values, page 19. If resistance values are O.K., then reconnect
cable harness to the fuel pump.
1. Check fuel pump electrical connector.
a. Pins of female plug end can become spread
b. Re-crimp if needed
c. Clear code and run unit.
d. If problem persists continue below
2. Inspect the wiring for damage, check continuity from the 8 pin housing for an external FMP, and 14 pin housing for an internal FMP.
i. Reference code 52
REVISION LEVEL A - 12/09/13