Engine Load Calibration
engine
Description
Engine throttle sensor value is below 90% at start, does not drop below 90% within five seconds, or does not drop below 10% at shutoff, and the control system modulates CSMV as required.
Activation Conditions
Activate alarm if: Condition 1 = At engine start if engine throttle sensor (Rack Position Sensor) value is less than 90%. Condition 2 = After start if the sensor value does not drop below 90% within five seconds. Condition 3 = At engine shutoff if the sensor value does not drop below 10% within five seconds.
Unit Behavior
Alarm only. Control system will modulate CSMV as required.
Reset Conditions
Alarm may be manually reset using the display mounted keys or by turning the unit off, then back on again.
Corrective Actions
1. Check Rack Position Sensor (RPS) Power And Wiring a. Inspect sensor, connector pins and terminals. No physical damage to sensor. No damaged or corrosion in connections. b. If required, power sensor by placing the unit in PC mode, check for power. Voltage reading between connector position 1 (positive) and position 2 (negative) should be 5 volts DC. Check connectors and wiring between terminals for damage, moisture or corrosion. c. Check for continuity from connector terminal 3 to ENCU-7. If good continuity is not present, check connectors and wiring between terminals for damage, moisture or corrosion. 2. Perform Engine Load Calibration: Perform Engine Load Calibration as referenced in Section 1.5.13. 3. Replace Rack Position Sensor (RPS): Replace sensor with known good component. Calibrate sensor and ENCU. Refer to Section 1.5.13.