Not sure if im in the correct section but wanted to get some insight on replacing my throttle by wire. I'm pretty well mechanically inclined and like to work on my bike as much as possible and 99% positive I have an issue and need to replace my throttle by wire. I have a 2014 flhx and before I get to taking more then I need to apart I wanted to see if anyone has pictures or can give me a breakdown of what all needs to be taken apart to replace the throttle by wire. I've been told it's quite a time consuming job but I'd like to give it a try. Thanks in advance for any help you guys can give me!

 

You should get a manual for yourself, very helpful in these jobs.

 

"Throttle by wire" has several components. Which part do you need to replace? Twist-grip sensor? Throttle body? Something else? Has your bike been properly diagnosed?

 

How do I go about getting a manual? Or where is the best place to get one I guess I should ask.

 

@strych9 it's the actual wire that runs thru the handlebars. And yes the diagnosis came a tech from vance and Hines and confirmed from a Harley tech, we started with unplugging and checking to make sure the connection was clean on the bottom left side of the air cleaner, then we checked the connection at the ECM under the seat.

 

Dealer, Ebay, put an ad on the "Want to Buy" section here, good luck.

 

You should find someone competent that can dispose to the root cause.

 

@TriGeezer the diagnosis came from 2 techs one from vance and Hines the other was a certified harley tech. I know that doesnt guarantee that they are correct but seems like it's very likely to me since they both said the same thing. The harley tech also told me they had some issues and recalls with the throttle by wire wire for a few years.

 

Do yourself a favor before you try to fix the handlebar wiring. That wiring generally has no problems unless somebody changed the bars and messed up (common).

The common issue is at the throttle body connector. Access it, unplug it, then plug it back in to see if it fixes your issue. If it does, the terminals in that connector need to be replaced.

There's a bulletin regarding this issue:

TT418A service bulletin applies to 2008-Later Touring, Police & Trike Models

Symptoms: Driveability or Performance Concerns; Abnormal or Erratic Mechanical Operation; Intermittent or Erratic Electrical Operation.

Note: Throttle Position Sensor (TPS) circuit DTC's P0120, P0220, P0122, P0123, P0222 and P223 should take diagnostic priority over a P2135 code. If any of these TPS codes exist concurrently with the P2135, they should be investigated first using the diagnostic manual.

The TCA has two potentiometers (designated as TPS1 & TPS2) and a electric DC motor for controlling the actuation of the throttle. The two TPS sensors work opposite of each other. As the throttle plate opens , TPS1 voltage ranges from 0.0-5.0 Volts, while TPS2 voltage ranges from 5.0-0.0 volts. The sum of the two TPS voltages should always measure approximately 5.0 volts. These wire are: TPS1, pin # 37 (BN/V wire) of the ECM, and TPS2 pin #36 (BN/R wire) of the ECM

The TPS1 and TPS2 sensors should never add to more than 5.13 Volts Direct Current (VDC) or less than 4.87 VDC . A sum of voltages out of this range should register a current P2135 code.

Troubleshooting:

It is believed that FRETTING CORROSION is a major contributor of this code. A poor connection at the Throttle Control Actuator (TCA) can affect the sensor voltages reported to the ECM and this will set this DTC. As you can see from the General Information section, the sensor voltage only need to be altered by 0.13 VDC to possibly set the code.

The most common vehicles to have these symptoms are those with more than 8,000 miles (12875 Kilometers) or 103 cubic inch and larger engines. Vibration is believed to contribute to the FRETTING CONDITION.

Repair Procedure:1. While monitoring the TPS1 and TPS2 voltages on Digital Technician 2 (DT 2), wiggle the TCA [211] and the ECM [78] connectors.
2. If the voltage changes while wiggling the ECM connector , replace the affected ECM terminals (part # 72605-08). These wires are: TPS1, pin #37 brown/violet wire of the ECM, and TPS2, pin #36 brown/red wire of the ECM.
3. If no voltage change is noted while moving the ECM connector , the connection issue could be in the TCA. Replace all socket terminals with NEW terminals (part # 72663-11, used in current production) at the TCA connector[211B].
4. BEFORE CONNECTING the TCA CONNECTOR, clean the male TCA pin terminals with a swab and alcohol, and ASSEMBLE WITH DIELECTRIC GREASE.

DTC P2101
General Information: The TCA contains two potentiometers (designated as TPS1 & TPS2) and a electric DC motor for controlling a actuation of the throttle. TPS1 & TPS2 are mounted in the TCA. They are connected to the keyed shaft of the throttle plate and used to communicate the throttle plate position.
Each TPS supplies input to the ECM in response to the position of the throttle plate. The ECM activates the motor in the TCA to move the throttle plate, based on signals from the Twist Grip Sensor (TGS). When the ECM send voltage modulations to pins 2 & 3 0f the TCA to move the throttle motor, it checks fo subsequent TPS1 and TPS2 voltage changes. If it does not sense TPS changes it will set this code.

Troubleshooting: First verify that the throttle plate moves freely when engine is not running. If it does not the TCA needs to be replaced.
Poor ECM connections seem to be the most likely cause. Be aware that this issue may be aggravated by the seat pan making contact with the ECM connector. In most cases, this is caused by the installation of an aftermarket seat.
A poor connection at ECM pins #29 & 30 could cause an interruption in voltage to the throttle motor and set this code. Similarly the ECM uses voltage from pin #52 yellow/green wire to supply power used at pins #29 & 30 and could cause the same symptoms.

Repair Procedure:
Identifying the connection issues at this location may be difficult.
1. Replace all socket terminals with NEW terminals (part #72663-11 used in current production) at the TCA connector [211B].
2. BEFORE CONNECTING the TCA CONNECTOR, clean the male TCA pin terminals with a swab and alcohol, and ASSEMBLE WITH DIELECTRI

 

@strych9 thanks so much I really appreciate it!! The bars are stock and only thing "aftermarket" done was new grips put on but that was over a year ago.