Sensor Supply Voltage 1 Low
electrical
Description
Sensor voltage is below 4.00 V, and engine operation requires shutdown.
Activation Conditions
Voltage to sensor is below 4.00 V
Unit Behavior
Engine Operation: Required Shutdown. Electric Operation: Will not activate in electric operation.
Reset Conditions
If trigger on message not received for five seconds, alarm reset or alarm may be manually reset by turning the unit off, then back on again.
Corrective Actions
1. 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 and terminals. (See wiring schematic Section 10.) Verify there is no physical damage to sensor, and no damage or corrosion in connections. c. Check power from ECU. Should read approximately +12 VDC from terminal ENCU-43 to ENSSN-3. d. Check ground to ECU. Check wiring from terminal ENCU-20 to ENSSN-1 e. Check signal to ECU. Check wiring from terminal ENCU-2 to ENSSN-2