Last Saturday the wife and I went out for a good day trip of 330 miles. On the way home, 15 miles from he front door, while riding on the interstate at 75 mph, the bike (2010 Ultra Classic with 46,000 on the clock) started slowing down with some decel popping and went into limp mode. I pulled to the side, shut it off and restarted it, also the engine light illuminated as well while running, took off and 15 seconds latter went into limp mode again. I took the next exit and made it to a gas station, again I shut it off, turned off the radio, sat for a minute and fired it back up again. We took off again and it did not go into limp mode and we made it home without further problems. We had plans that evening and I went away for business Sunday and just this morning had the chance to check for codes. The codes that I found are P1511 EFI Power Management Mode and P2135 TPS Correlation Error. My question is, what does all of that mean? My first thought is that the connector going into the throttle body has become corroded. I have been told that this is a known issue with the 2010 model year and the MC has a gold pinned connector that can be swapped out for a fee of course.

Thanks in advance for all help and thoughts in advance!

 

easy to remove the connector from servo motor/throttle body and re-connect- that will renew the connection- if you are home you can clean it and maybe use dielectric grease

( which can be good or bad...grease can keep moisture out...or trap it in)

that's the easy step.

IF you have a piggyback tuner, remove and reconnect for same reason- some have had the tuner fail and just remove it to get home.




but the p2135 makes for suspect throttle position sensor itself or the wiring to/from.

reset the codes and see if symptoms re-appear or new codes

p1511 likely a result of the TPS error

Mike

 

Thx Mike, I did that there was no evidence of any corrosion.

 

I agree with Mike, clean the connector and use dielectric grease to keep moisture out. The ED manual's DTC priority list has P1511 at 91 and P2135 at 44, that means P2135 probably caused P1511. Here are a few pages from the ED manual and a copy of a service bulletin:

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 DIELECTRIC GREASE
__________________

 

Bad stator?

 

My guess is your ECM is bad. That's what my bike did last fall and a dealer replaced the ECM under the emissions warranty.

 

I would normally agree, however, he said he turned off his radio, and it didn't happen again. That's why I'm thinking its struggling to maintain a charge.

 

that ignores the codes set in the ecm- as given in the first post ( as does the guess that the ecm has failed)

a charging system fault would give a whole other series of indications.


the comprehensive post by Vernal is pretty definitive

Mike

 

Stator was replaced at 25,000 miles.

 

Same problem here in Europe.
Removing the connector from throttle body and reconnecting seems to help...for the moment. After 20 miles again limp mode and so on ...
Really exciting, running into limp-home in fast moving traffic!
At home, I cleaned the pins with alcohol. On the test ride ... again a limp mode.
Now my question: How to replace the socket terminals with new terminals? (if cleaning does not solve the problem).
Manual says: "The TCA is not sold separately."