62-11640 7–56
00130 CHECK ENGINE RPM SENSOR
• ACTIVATION: If ambient temperature is above 32°F (0°C), and this is the second or third start attempt,
and the engine oil pressure switch is closed (oil pressure good), and engine speed is sensed at less than
1000; OR, if ambient is below 32°F (0°C) and the DC amp draw is more than 2 amps, and this is the sec-
ond or third start attempt, and engine speed is sensed at less than 1000.
• UNIT CONTROL: Engine Operation: Alarm Only and engine will be considered running.
Electric Operation: This alarm does not activate in electric operation.
• RESET CONDITION: Auto reset when engine speed is greater than 1,000 rpm or alarm may be manually
reset using the display mounted keys or by turning the unit off, then back on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, the active
alarm should clear itself (refer to reset condition above). Operate the unit through the appropriate modes to see
if any active alarm occurs. Continue with the steps below as necessary.
CORRECTIVE ACTIONS:
1. Check For Alarm 00041 (Engine Stalled)
Check for Alarm 00041 (Engine Stalled). When alarms 00041 and 00130 occur at the same time,
generally, the engine has run out or is running out of fuel. This causes the engine to surge. Check
fuel in tank and add fuel as necessary. Check fuel lines between the fuel tank and the fuel pump inlet
to ensure air is not being drawn in.
2. Check Engine Speed Sensor (ENSSN)
a. Check actual engine speed using a hand held tachometer and compare with speed shown in unit
data. Must be ± 20 rpm. Must be a steady reading.
b. Inspect sensor, connector pins & terminals. Verify there is no physical damage to sensor, and no
damage or corrosion in connections.
c. Check power from ENCU. +5 VDC from terminal ENCU−43 to ENSSN−3.
d. Check ground to ENCU. Check wiring from terminal ENCU−20 to ENSSN−1.
e. Check signal to ENCU. Check wiring from terminal ENCU−2 to ENSSN−2.
3. Check Circuits With Test Sensor
Substitute known good sensor and check unit data reading (Refer to Section 3.14). Must be within ±
50 rpm of reading on tachometer.
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