5-4. ELECTRONIC CONTROL UNIT (ECU)
This task covers:
General Safety Instructions
Tool Kit, Service Refrigeration Unit
The heater ignition system contains dangerous
voltages which can cause severe electrical shock.
Be sure to disconnect power before any mainte-
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).
Inspect the ECU (2) for overheating (burning), corrosion, or for terminal lug damage. Replace a defective ECU.
1. Position the ECU (2) in place in heater and secure with two screws (3).
2. Install wires (1) to terminals on ECU (2).