Massey Ferguson 00.1.61 – Dash: Issue With 9.5 Volt Output Voltage From Dash To Sensors (Dash)

The 9.5V reference voltage supplied by the instrument cluster to various machine sensors (such as the variable steering setting potentiometer or auxiliary hydraulic oil temperature sensor) is out of the expected range. This is typically caused by a short circuit in the sensor wiring, a failed sensor pulling the voltage down, or an internal failure within the dash's power supply circuit.

• 5710SL
• 5711SL
• 5712SL
• 5713SL
• T4
• 4707
• 4708
• 4709
• 4710
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S

1. 1

   Verify main supply voltage from the battery and alternator is within normal operating specification (12V-14V). Low or spiking system voltage can cause reference voltage dropouts.

2. 2

   Perform a sensor isolation test by disconnecting sensors that rely on the 9.5V reference one by one. Monitor the 9.5V output circuit; if voltage returns to normal, the disconnected sensor is internally shorted.

3. 3

   Inspect the wiring harness between the dash and the sensors for chafing, bare wires, or pinch points that could cause a short to ground or a short to voltage.

4. 4

   Measure the voltage directly at the dash output pin for the 9.5V sensor supply with the sensor harness completely disconnected. If the voltage is incorrect or zero with no external load, the dash module has an internal failure.

1. 1

   Turn off the tractor and disconnect the battery before performing electrical repairs.

2. 2

   If the diagnostic checks isolated a shorted sensor, replace the faulty sensor and reconnect the harness.

3. 3

   If the wiring harness was found to be damaged, repair the chafed/shorted wires using appropriate weather-sealed connectors, or replace the affected harness section.

4. 4

   If the dash module failed the output test (no 9.5V output with the harness disconnected), remove the trim panels surrounding the steering column/dashboard.

5. 5

   Disconnect the main electrical connectors from the rear of the instrument cluster.

6. 6

   Unbolt and remove the faulty dash module.

7. 7

   Install the replacement instrument cluster and reconnect the wiring harnesses.

8. 8

   Reconnect the battery.

9. 9

   Connect a diagnostic tool (such as the AGCO Electronic Diagnostic Tool) to clear the 00.1.61 fault code and verify that the 9.5V reference voltage is now stable.