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Auxiliary Intermediate (PTO) Speed Switch Validation – Data Erratic, Intermittent, or Incorrect
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 523 PID: P089 SPN: 611 FMI: 2 LAMP: Amber SRT: |
Auxiliary Intermediate (PTO) Speed Switch Validation – Data Erratic, Intermittent, or Incorrect. The position of the intermediate speed control switch 1 does not match the position of the intermediate speed control validation switch. |
Intermediate speed control switch may not operate correctly. |
 Intermediate Speed Control Switch Configuration
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Circuit Description
Up to three Intermediate Speed Control set speeds (1,2,3) can be selected, depending on OEM availability. A multi-position switch or three individual switches must be installed by the OEM to support this feature.
Component Location
The Intermediate Speed Control (PTO) switch is mounted by the OEM, usually inside the cab of the vehicle or externally as a speed control switch.
Shop Talk
When activated by switch or hand throttle, the Intermediate Speed Control feature governs engine speed to the corresponding preset speed. The three preset speeds can be adjusted with an increment or decrement switch but can not exceed the low or high idle governor engine speed limits.
If Intermediate Speed Control validation is being use, Intermediate Speed Control Switched Set Speed Three will be used as the validation input.
Refer to Troubleshooting Fault Code t05-523
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