New Holland 2073 – TCM: Shuttle Lever Reverse Switch Voltage Too Low

The voltage signal from the reverse switch within the shuttle lever assembly (FNRP Pod) is below the minimum expected threshold. The Transmission Controller has detected that the reverse switch input is either shorted to ground or has an open circuit. This prevents the controller from correctly identifying the operator's command to select the reverse direction, which affects the proper operation of the transmission system.

• T7.220
• T7.235
• T7.250
• T7.260
• T7.270
• T6010
• T6020
• T6030
• T6040
• T6050
• T6060
• T6070
• T6080
• T4020
• T4030
• T4040
• T4050
• TM115
• TM120
• TM125
• TM130
• TM135
• TM140
• TM150
• TM155
• TM165
• TM175
• TM190
• TS90
• TS100
• TS110
• TS115
• TS100A
• TS110A
• TS115A
• TS125A
• TS130A
• TS135A
• TL70
• TL80
• TL90
• TL100
• TL80A
• TL90A
• TL100A
• TN60A
• TN70A
• TN75A
• TN85A
• TN95A
• TN Specialty Models (F, V, N)
• JX70U
• JX80U
• JX90U
• JX100U
• JX1070U
• JX1080U
• JX1090U
• JX1100U
• Boomer Series
• Workmaster Series

1. 1

   Visually inspect the wiring harness leading to the shuttle lever (especially the loom under the cab floor) for chafing, pinching, or breaks.

2. 2

   Disconnect the electrical connector at the shuttle lever assembly and inspect pins and sockets for corrosion, dirt, or damage. Clean with a suitable contact cleaner if necessary.

3. 3

   Perform a continuity test on the reverse switch signal wire between the shuttle lever connector and the transmission controller to check for an open circuit.

4. 4

   Perform a short-to-ground test between the reverse switch signal wire and chassis ground.

5. 5

   Actuate the shuttle lever through forward, neutral, and reverse positions to check for smooth movement and distinct detents (mushy movement indicates a worn assembly).

6. 6

   Test the internal contacts of the shuttle lever switch with a multimeter to ensure continuity in reverse and infinite resistance in neutral/forward.

1. 1

   Prepare machine for service

   Ensure the tractor is on a level surface, engage the parking brake, turn off the engine, and disconnect the battery.

2. 2

   Access shuttle lever

   Remove any steering column shrouds or dash panels necessary to gain access to the shuttle lever assembly and its electrical connector.

3. 3

   Perform diagnostic checks

   Follow the diagnostic checks listed above to pinpoint the cause of the fault.

4. 4

   Repair wiring harness

   If a wiring fault (chafing, open circuit, or short) is found, repair the damaged section using appropriate connectors and heat shrink tubing. Replace the harness section if damage is extensive. The fault is commonly found in the loom under the cab floor.

5. 5

   Replace shuttle lever assembly

   If diagnostic tests indicate a faulty switch or worn detents, disconnect the electrical connector, unbolt the assembly from the steering column, install the new assembly, and reconnect.

6. 6

   Reassemble components

   Reinstall any removed panels or shrouds and reconnect the battery.

7. 7

   Clear codes and calibrate

   Turn the ignition on, clear stored fault codes using a diagnostic tool or menu, and perform a transmission calibration if required for your specific model.

8. 8

   Verify operation

   Start the tractor and test the shuttle lever to ensure proper engagement of forward and reverse gears.