CLAAS Id7531h / 7531h – MFA (A100): Voltage of the signal specified by the stop sequence incoherent contact.

The electrical signal coming from the stop sequence button/contact is erratic, out of expected range, or incoherent. As a system response to this fault, the Claas Sequence Management (CSM) is rendered inactive.

• Axion 810
• Axion 850
• Axion 920
• Axion 950
• Arion 510
• Arion 620
• Arion 640

1. 1

   Check the stop sequence contact (S185) physical switch/button on the armrest

2. 2

   Check the MFA (A100) armrest multifunction module that receives the signal from the S185 contact

1. 1

   Visual Inspection

   Access the multifunction armrest (MFA A100) and locate the stop sequence contact switch (designated as S185). Inspect the switch for physical damage, sticking, or liquid intrusion (a common issue on armrest controls).

2. 2

   Wiring and Continuity Test

   Check the wiring harness and connector between the S185 contact and the MFA (A100) module circuit board. Look for pinched wires, corrosion, or loose pins that could cause an 'incoherent' voltage drop or spike.

3. 3

   Test the Switch (S185)

   Using a multimeter, test the S185 switch for proper operation. Ensure it provides a clean, consistent signal when pressed and released. If the resistance jumps erratically, the switch is faulty.

4. 4

   Module Verification

   If the switch and wiring test perfectly, the fault lies within the MFA (A100) armrest multifunction module's internal circuitry.

5. 5

   Clear Codes and Retest

   After repairing the wiring, replacing the switch, or replacing the module, clear the fault codes and test the Claas Sequence Management (CSM) to ensure it is active again.