TM 9-4520-260-13
5-4. ELECTRONIC CONTROL UNIT (ECU)
This task covers:
a. Removal
b. Inspection
c. Installation
d. Testing
INITIAL SETUP
Tools
General Safety Instructions
Tool Kit, Service Refrigeration Unit
Material/Parts
The heater ignition system contains dangerous
voltages which can cause severe electrical shock.
Diesel fuel
Be sure to disconnect power before any mainte-
nance actions.
Tags
Equipment Condition
Power disconnected and fuel supply turned off.
1. Tag (Item 13, Appendix E) and remove wires (1) from ECU (2).
2. Remove two screws (3) securing ECU (2) to heater, and remove ECU (2).
INSPECTION
Inspect the ECU (2) for overheating (burning), corrosion, or for terminal lug damage. Replace a defective ECU.
INSTALLATION
1. Position the ECU (2) in place in heater and secure with two screws (3).
2. Install wires (1) to terminals on ECU (2).
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