John Deere CAB523644 – CAB: Separator Engage Switch Logical Conflict

The Cab Control Unit (CAB) has detected a logical conflict within the separator engagement system. This fault is triggered when the separator engage ON switch (cc# 933) and the separator engage OFF switch (cc# 931) are either both activated (ON) simultaneously or both deactivated (OFF) simultaneously. This indicates an overlapping or conflicting condition, typically caused by a faulty switch, damaged wiring, or an issue with the Cab Control Unit.

• 9450
• 9500
• 9550
• 9560 STS
• 9570 STS
• 9600
• 9650
• 9660 STS
• 9670 STS
• 9750 STS
• 9760 STS
• 9770 STS
• 9860 STS
• 9870 STS
• S550
• S650
• S660
• S670
• S670HM
• S680
• S680HM
• S690
• S690HM
• S760
• S770
• S780
• S790
• 8100
• 8200
• 8300
• 8400
• 8500
• 8600
• 8700
• 8800
• 9700
• 9800
• 9900
• 7660
• 7760
• CP690
• Amadas 9970 SP

1. 1

   Visually inspect the separator engage switch on the armrest console for physical damage, excessive wear, or debris that might interfere with operation.

2. 2

   Test the mechanical operation of the rocker switch to ensure it moves freely between ON and OFF positions and locks into place.

3. 3

   Inspect the wiring harness connected to the switch for chafing, cuts, or loose connections.

4. 4

   Test the internal contacts of the separator engage switch using a multimeter for continuity in both ON and OFF positions (there should be a clear change in state).

5. 5

   Inspect the wiring harness between the switch and the Cab Control Unit for short circuits to power/ground or open circuits.

6. 6

   Check the wires connected to the separator drive pulley solenoid for damage or loose connections.

1. 1

   Park and secure machine

   Park on a level surface, lower all implements to the ground, engage the parking brake, shut off the engine, and remove the key.

2. 2

   Disconnect battery

   Disconnect the negative battery cable before beginning any electrical repairs.

3. 3

   Access the switch

   Remove the necessary console panels to gain access to the rear of the separator engage switch and its electrical connector.

4. 4

   Perform Diagnostic Checks

   Follow the diagnostic checks listed above to identify the root cause of the fault.

5. 5

   Replace Faulty Components

   If the separator engage switch is found to be faulty, replace it with a new OEM part. If the wiring is damaged, repair the affected section of the harness or replace the harness if the damage is extensive.

6. 6

   Reassemble and test

   Reconnect electrical connectors, reassemble the console, reconnect the battery, start the machine, and attempt to engage the separator to verify the fault is cleared.