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Curtis B.
Curtis B., Technician
Category: Construction and Road Equipment
Satisfied Customers: 1231
Experience:  Technican turned service manager with multiple lines of equipment and rental units.
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Cat 320L SN:7jk19018 with 3066 eng 1. No auto throttle 2.

Customer Question

Cat 320L SN:7jk19018 with 3066 eng
1. No auto throttle
2. Govenor cable was melted due to muffler all has been replaced
3. throttle works in manual mode
4. Can't open the calibrate screen to calibrate the governor actuator
5. Shows active e15 code
6. Checked all wires ohm meter and with light low resistence and will conduct current
7. Dail control registers on display A1 to A10
8. Is there a governor actuator fuse in this system and if so where is it.
9. Green LED is on at ECM
10. Throttle display changes from A1 to A10 with Auto/Manual Switch in either position and Display U1 to U10 with pump in backup mode and Auto/Manual in either position
11. Throttle Auto/Manual switch has been check with ohm meter and light low resistence and conducts current. All wiring to Auto.Manual switch has been checked and low resistence and conducts current.
Submitted: 1 year ago.
Category: Construction and Road Equipment
Expert:  catmastertech replied 1 year ago.


The serial number posted is for the engine. If it is original, your machine serial number should be 9KK04476.

Are you able to use the dash to access the G/A calibration mode? Are you using the correct service manual for this machine?

E15 code is showing the throttle is in manual control.

The letter A should not be showing either, it appears when one of the backup switches are in manual control.

The fact you have throttle control with manual throttle switch means it is powered correctly.

The issue is with the machine controller (ECM).

Which lights on the front of the controller are on with the key on? (Green must be on for power to the controller.)

Use the fuse panel has a fuse for the actuator and should be marked G/A fuse in the manual.