3.10 | Tractor Valve Set-up -John Deere
Modern John Deere (CANBUS)
Applicable to:
John Deere tractors with CANBUS-based SCV control (typically 2005+ models).
Connection Method
John Deere CANBUS-based SCV systems are controlled by COMMAND directly over the ISOBUS, so the only hardware requirement for direct control is that COMMAND be connected to the tractor ISOBUS via the 4-way Deutsch DT connections on either the cab (T3H-C006) or external (T3H-C005) breakout harnesses.
Installation Steps
1. Connect COMMAND to the ISOBUS using either:
- T3H-C006 (in-cab), or
- T3H-C005 (rear ISOBUS)
2. Ensure a secure connection at the 4-way Deutsch connector.
3. Power on the system and verify ISOBUS communication.
(See Section 5.4)
Operation Notes
COMMAND interfaces with modern John Deere tractors by sending CANBUS messages to the integrated valve controller, commanding either port A or port B flow of the rear tractor SCVs.
To operate the SCVs in automatic control mode, the user must push the respective SCV lever into the detent position (not float). This will cause "AUTO" to appear on the console/display to indicate that the SCV is ready for automatic control commands.
Moving the lever will disengage AUTO mode on the console/armrest but "AUTO" may remain visible in the SCV status area as it's still in automatic control mode. To re-enter AUTO mode, push the SCV lever into detent position again.
IMPORTANT: Moving the SCV lever will disengage AUTO mode in modern JD tractors, so movements based on any current valve signals will cease. Always keep this in mind during operation - the lever must be pushed into detent position again to resume automatic control.
John Deere Legacy (Analog)
Applicable to:
John Deere tractors with analog SCV control (typically pre-2005 models).
Connection Method
COMMAND can control John Deere legacy valve systems through the use of a T3H-V001 COMMAND Legacy Output Adapter.
Installation Steps
10-way Metripack 150 Series Connection
- Connect the T3H-V001 adapter to the T3H-C002 ECU breakout harness at the round Deutsch HD series connector.
2. Connect the 10-way Metripack connector on T3H-V001 to the tractor's SCV signal input plug.
John Deere SCV Controller Connection Overview
Operation Notes
COMMAND interfaces with legacy John Deere tractor SCVs by sending analog voltage signals to the integrated valve controller, commanding either port A or port B flow of two of the rear tractor SCVs (generally SCV1 and SCV3).
To operate the SCVs in automatic control mode, the user must push the respective SCV lever forward into the detent position. This will cause "AUTO" to appear on the console/display to indicate that the SCV is ready for automatic control commands.
Moving the lever will disengage AUTO mode on the console/armrest. To re-enter AUTO mode, push the SCV lever into detent position again.
IMPORTANT: Moving the SCV lever will disengage AUTO mode in modern JD tractors, so movements based on any current valve signals will cease. Always keep this in mind during operation - the lever must be pushed into detent position again to resume automatic control.