New Holland NH 2003 – Transmission Controller (Transmission ECU / TCU): CP' - Clutch pedal required

An operational prompt or safety interlock code indicating that the system requires the operator to fully depress the clutch pedal to complete a shift or shuttle command. If this code appears while the operator is fully depressing the clutch pedal, it means the system is failing to recognize the pedal's position, usually due to a faulty clutch pedal switch, a failing clutch pedal potentiometer, or a wiring issue.

• T4
• T5
• T5060
• T6
• T7
• TS
• TM
• TM120-TM190
• TL
• 40 Series
• 60 Series
• 8160
• 8560
• 70 Series

1. 1

   Verify Operator Technique: Ensure the clutch pedal is being fully depressed to the floor during shuttle or shift commands.

2. 2

   Check for Accompanying Codes: Look for related electrical fault codes (such as 2011, 2012, or 2037) that pinpoint the exact sensor failure.

3. 3

   Inspect Mechanical Linkage: Check the clutch pedal return spring and linkage. A broken spring can prevent the pedal from returning fully, throwing off the potentiometer calibration.

4. 4

   Test the Bottom Clutch Switch: Use a multimeter to test the clutch pedal safety switch for continuity when the pedal is bottomed out.

5. 5

   Test the Potentiometer: Check the 5V reference signal to the clutch pedal potentiometer and verify that the resistance sweeps smoothly without dead spots as the pedal is depressed.

1. 1

   Access the Pedal Assembly

   Remove the lower dash or steering cowl panels to access the clutch pedal linkage, switch, and potentiometer.

2. 2

   Replace the Faulty Sensor

   If the switch is faulty: Disconnect the 2-pin wiring harness from the bottom clutch switch. Unthread or unclip the old switch and install the replacement. If the potentiometer is faulty: Disconnect the wiring harness. Unbolt the potentiometer from the pedal pivot axis. Install the new potentiometer, ensuring the mechanical linkage/rod is properly aligned so the sensor sweeps its full range.

3. 3

   Check Springs and Linkage

   Replace the clutch pedal return spring if it is stretched or broken to ensure proper pedal tension.

4. 4

   Calibrate the Transmission

   After replacing the potentiometer or transmission controller components, you must perform a transmission and synchro clutch calibration routine (often indicated by code 2024: Synchro clutches not calibrated). This teaches the Transmission ECU the new minimum and maximum voltage values for the clutch pedal.

5. 5

   Clear Codes

   Clear the inactive 2003 code from the Transmission ECU memory and test drive the tractor to verify shuttle shifting operates without the 'CP' prompt.