Thundermax Throttle Loss - How Diagnose and Repair User Manual download pdf

Throttle By Wire TPS and TGS Diagnostic Codes

Two sensors provide information to the ECM to control the throttle.

TPS = Throttle Position Sensor

TGS = Throttle Grip Sensor (Throttle twist grip)

If either of the sensors becomes faulty, the ThunderMax ECM places the throttle into one

of two for safety modes.

Engine RPM is reduced to “Idle Only”

Engine RPM is set to “Limited Performance Mode (Limp home)”

NOTE: This is not a “fault” within the ThunderMax ECM. The ThunderMax ECM is

responding to sensor faults on the motorcycle for rider safety.

The following link describes methods of diagnosing this condition

TT418: DTCs P2135 and P2101 Theory and Diagnostics

Recommended Maintenance Procedure to correct loss of throttle.

Locate the TCA connector (back side of the Throttle Body)

Disconnect the TCA connector

Inspect the TCA connector pins

NOTE: If your TCA connector pins are severely fretted or damaged then repair

is required***.

Clean and apply a light coat of dielectric grease to the connector.

Securely connect the TCA connector making sure it LOCKS into place.

***H-D dealer offers an updated pin released in 2011 (Part # 72663-11) These

new pins are made from silver to enhance conductivity to the TCA.

If you continue to experience loss of throttle control with stored DTC's for TGS and

TCA functions, you likely have a wiring problem with the TGS circuit in the

handlebars. TGS problem are commonly due to faulty wiring during a handlebar

change.

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Throttle By Wire TPS and TGS Diagnostic Codes Two sensors provide information to the ECM to control the throttle. TPS = Throttle Position

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Repairing or extending TGS wires using “solder and wire” techniques will not work properly. Proper installation of either a TGS with an extended

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Thundermax Throttle Loss - How Diagnose and Repair User Manual