General
Refer to the VRSCA Electrical Diagnostic Manual for information on the function and testing of the engine coolant temperature (ECT) sensor.
Removal
Warning! To protect against shock and accidental start-up of vehicle, remove the maxi-fuse before proceeding. Inadequate safety precautions could result in death or serious injury.
1. Remove right side cover and remove maxi-fuse. See 8.5 Maxi-fuse.
2. Remove airbox assembly. See 1.4 Airbox and air filter.
Caution! If airbox is not to be reinstalled immediately, cover throttle body intakes with tape to prevent contaminates/ objects from falling down the throttle bores. Do not use shop rags or objects that could damage the throttle body butterflies.
3. Cover air intakes to prevent debris from entering cylinders.
4. Remove block drain screw. Drain cooling system. See 6.3 Engine coolant.
5. Loosen clamps at each intake and lift throttle body straight up.
![](https://motoinstruction.ru/img/harley/2/111268.jpg)
Figure 1-9. Intake clamps, throttle body removed
Note. Observe the position of the clamps for reassembly.
6. With throttle cables attached, wrap a shop towel around body for protection and secure away from engine.
7. Cover intake openings to prevent objects from falling into intake bore. Remove throttle body and fuel rail.
8. See Figure 9-10. Unplug ECT sensor connector [90B] by pulling external latch outward and using rocking motion to remove.
![](https://motoinstruction.ru/img/harley/2/111269.jpg)
Figure 9-10. ECT sensor location: 1. Front intake; 2. ECT; 3. Rear intake
9. Loosen ECT sensor using socket. When sensor starts to turn easily, finish removing by hand.
Installation
1. Hand start new ECT sensor into thermostat housing 2-3 turns.
2. Tighten sensor to 23 Nm (17 ft-lbs).
3. Connect ECT sensor connector [90 В].
4. Uncover intake openings and throttle body.
5. Orient intake clamps as shown and install throttle body and fuel rail. Tighten clamps 1.25 Nm (11 in-lbs).
6. See 1.19 Spark plug/coil. Install coils.
7. Attach fuel lines.
- a. Insert fuel lines from injector back under frame and connect to fuel tank.
- b. Push connector onto fuel tank elbow until a "click" is heard.
- c. Install right angle connectors on rigid lines from injector. Push until audible "click" is heard.
8. Fill engine coolant system with GENUINE HARLEY-DAVIDSON EXTENDED LIFE ANTIFREEZE & COOLANT through the coolant overflow bottle.
9. Replace the maxi-fuse and right side cover.
10. After running engine, check coolant level in overflow bottle with coolant cold and motorcycle on jiffy stand. If level is below COLD FULL line, remove cap from overflow bottle and add antifreeze until fluid level reaches COLD FULL line.
11. Continue to run engine, check level, and add antifreeze until coolant level remains at COLD FULL line with the motorcycle on the jiffy stand.